DO THE TON

Blood Sweat Tears and Grease => Projects => Specials => Topic started by: Rick4004 on Feb 09, 2019, 17:42:23

Title: Honda RS1000 - CB400F Mini Replica
Post by: Rick4004 on Feb 09, 2019, 17:42:23
I've just started a new project that I hope doesn't drag out too long, and doesn't take up too much time. Most of the parts used will be just stuff that I already have sitting around from past projects.
My inspiration - Honda RS1000 Racer Circa 1979.
These go by various names, RCB900, RCB1000, RS1000. These bikes were built from 1976-81 in various configurations, in fact, being hand built, it's doubt-full that any two were exactly the same. If you do a google search you will find lots of different seats/fairings/tanks used over the years. The last ones built in 80-81 even had mono-shock rear ends.
To me, the iconic signature features of these bikes is the solo seat, long tank, half fairing, and the curved muffler.
Anyway, as a teenager, these were my favorite racebikes, and when I was 17 I bought a 1980 DOHC CB750F that was the child of these racebikes.
I've got enough CB400F rolling chassis sitting around that I decided my next 400F should be an mini endurance racer.
Attached is a photo of the inspiration, and a quick CAD model of my 400F mini replica.
Title: Re: Honda RS1000 Mini Replica
Post by: Rick4004 on Feb 09, 2019, 18:26:07
I wanted to laydown the shocks to get that period twin shock race look. Step one was to measure the physical dimensions of the RS1000 and input those parameters into Tony Foale's suspension software. I have a 1/12 Tamiya scale model of the RS1000 and used that in conjunction with photos I was able to gather the dimensions, and estimate a spring rate. This gave me the spring force at the rear wheel and the rising rate curve.
I was then able to transfer that data to locate the shock mountings on the 400F. The spring force on the 400 is a little less than the 1000, but the 400 should be lighter, so I think it's a good starting point.
Title: Re: Honda RS1000 Mini Replica
Post by: Rick4004 on Feb 09, 2019, 18:36:14
I bought these generic chinese shocks off of ebay. 340mm long. My research indicated that these come with either 7mm or 8mm diameter springs on them, depending who the seller is. I chose the seller based on the fact that it was specifically stated in the description that the springs were 8mm. Of course, when they arrived, they were 7mm. I think the spring will be too light and I'll be searching for heavier springs.
I cut off the old shock mounts from the frame, cleaned up the tubes, and used some 3d printed marking guides that I built off the CAD data to position the holes for the new shock mounts.
Title: Re: Honda RS1000 Mini Replica
Post by: hooligan998 on Feb 10, 2019, 02:07:33
Very cool.  In.
Title: Re: Honda RS1000 Mini Replica
Post by: julian.allard66 on Feb 10, 2019, 05:41:44
Tamiya make a model of the RS1000, you might find it helpful for measurements etc.

CBX550 engine would give you a twin cam engine cheaply

Sent from my SM-T560 using Tapatalk

Title: Re: Honda RS1000 Mini Replica
Post by: Rick4004 on Feb 10, 2019, 10:22:12
julain.allard66 - Yes, I have the Tamiya model, I took some measurements off of it when inputting the suspension parameters. The CBX550 would make for a cool project, they were fast for their day. But, they are also pretty rare, and parts aren't easy to find. As I stated, this is a cheap build using existing parts, and I have lots of 400-4 stuff sitting around.
Title: Re: Honda RS1000 Mini Replica
Post by: Ichiban Moto on Feb 11, 2019, 13:44:31
Chris has things for those shocks and this tool:

http://chrislivengood.net/wp/advanced-spring-rate-estimator-new/

ps. anyone know Chris' username here?
Title: Re: Honda RS1000 Mini Replica
Post by: Rick4004 on Feb 12, 2019, 18:58:31
I wanted to disassemble the shocks, check them for assembly issues, and rebuild them with fresh oil. But first, I needed a spring compressor that fit. I have an S&W compressor, but it wouldn't work on these shocks. So, out came some flatbar, nuts,bolts, and threaded rod. Worked like a charm.
Title: Re: Honda RS1000 Mini Replica
Post by: Rick4004 on Feb 12, 2019, 19:10:48
ICHIBAN - I emailed Chris and he was very helpful. I was going to just purchase the shocks from him already rebuilt, but the shipping from the USA to Canada was $65USD. I ended up buying them direct from China for $85 US shipped to Canada, so I figured I'd might as well just rebuild them myself.
Title: Re: Honda RS1000 Mini Replica
Post by: Rick4004 on Feb 12, 2019, 19:16:06
I wanted a better swingarm for this project, something longer, wider, and stronger. I had a CBR600F1 sitting here with all the parts that I need to make it work. Only problem is that it is 20mm too wide to fit in the frame.
Cutting out the 20mm is the easy part. Getting everything lined back up and keeping it straight during welding will be the harder part.
Title: Re: Honda RS1000 Mini Replica
Post by: 1fasgsxr on Feb 13, 2019, 19:10:14
Why not take off the 20 at the pivot? 10 from each side.
Title: Re: Honda RS1000 Mini Replica
Post by: Rick4004 on Feb 15, 2019, 11:05:25
1fasgsxr - Just look at the photo, there isn't 10mm of material available to remove. Plus, by taking it out of the middle I leave all the bearing surfaces undisturbed, which means stock Honda bearings/seals can be used. Just need a shorter bearing spacer in the middle.

As an aside, the CBR300R uses the exact same bearings as this 1988 CBR swingarm.
Title: Re: Honda RS1000 Mini Replica
Post by: Rick4004 on Feb 15, 2019, 16:38:13
Well, looky what showed up at the door this morning. Wheels from a Suzuki GS500. I've always used wheels from the CBR600F1 when getting rid of the spoked wheels on the CB400F. The front CBR wheel is good for a 110 wide tire, and the rear is good for a 130 or 140 tire. But, they are getting harder and harder to find with good brake disks, so the nice sets that I used to find for less than $100 a set are now creeping up to $200 - $300 a set.
I thought about trying CBR250/300 wheels, but they are still pretty expensive too. Then I thought about the GS500. The stock tires are 110 front and 130 rear, and unlike the CBR that was only made for 3 years, the GS soldiered on basically unchanged from the early nineties into the mid 20-teens, so there are tons of wheel out there and they are cheap. I paid $90 USD for this set from a 1994 model. The shipping to Canada was more than the wheels.
After a quick check it looks like the rear axle for the GS will mate up with the CBR-F1 swingarm just fine. The GS front axle is a meek 15mm diameter, while the CBR-F4 forks that I have sitting here are base on a 20mm axle, so I'll have to see if I can do some bearing switcharoo  to use an F4 axle, or make some sleeves to use the GS axle.
Title: Re: Honda RS1000 Mini Replica
Post by: Rick4004 on Feb 15, 2019, 16:54:38
I made up a mandrel to fit into the swingarm pivot tube, and the mandrel expands as you tighten it down to grip and hold the tube. Then just some machine clamps on the arm.
I can now machine out the center section width that I need, and I end up with perfectly square surfaces for welding everything back together. (In theory anyway).
Title: Re: Honda RS1000 Mini Replica
Post by: Rick4004 on Feb 17, 2019, 18:43:43
So much work, so little accomplished. I made up a dual expansion mandrel to fit into the swingarm pivot tube to align the two halves before/during welding.
Took about 3 hours of machining, then 15 minutes welding. I think I'll add some half moon sleeves on the outside of the pivot tube, but it's good enough for now to proceed with mock-up.
Title: Re: Honda RS1000 - CB400F Mini Replica
Post by: Rick4004 on Feb 24, 2019, 14:49:48
Jumping around a bit already. I'm waiting for some tooling to continue with the swingarm so I turned my attention to the tail section for a bit.

1. The pile of parts are 3/4" MDF cut up to make a buck for the tail section.
2. Dry fit all the parts to make sure they all go together.
3. Everything glued together, and all the edges and radii "faired" to each other.
Title: Re: Honda RS1000 - CB400F Mini Replica
Post by: Rick4004 on Feb 24, 2019, 14:57:07
I started with the top panel of the tail section. Started forming the edges around a piece of 3" diameter tube. Got it roughed into shape. Will have to refine the edges as the other panels are mated up.
Title: Re: Honda RS1000 - CB400F Mini Replica
Post by: canyoncarver on Feb 24, 2019, 18:34:27
I'm in.  You have a great work process.  Thanks for sharing it.  Cool bike man.
Title: Re: Honda RS1000 - CB400F Mini Replica
Post by: JustinLonghorn on Feb 25, 2019, 08:58:48
I'm on board, man.
Title: Re: Honda RS1000 - CB400F Mini Replica
Post by: Maritime on Feb 25, 2019, 09:57:53
Signing up. this looks fun!
Title: Re: Honda RS1000 - CB400F Mini Replica
Post by: Rick4004 on Mar 07, 2019, 19:57:26
I formed the front seat section flanges by starting them on the bead roller using a "tipping wheel". This gets the flanges to about 70 degrees, and it's easy to get them to 90 by just backing the flange with a 2x4 and forming with a soft hammer.
To form the 3" radius flange i used a combination of hand forming over a piece of tube, and using the English Wheel.
Title: Re: Honda RS1000 - CB400F Mini Replica
Post by: Rick4004 on Mar 07, 2019, 20:01:19
My tooling arrived, so I switched back to the chassis. I added the first set of tubes to brace the shock mount area. I might do additional bracing, but I'll wait until I decide where the battery is going to mount.
Title: Re: Honda RS1000 - CB400F Mini Replica
Post by: Rick4004 on Mar 07, 2019, 20:10:06
I threw the frame up on the frame jig to get the rear wheel aligned. I checked the rear wheel position and compared it to my CAD models and they are within 1mm, so that's good.

The sprockets are about .25" out of line. I can get an offset front sprocket, or machine .25" off the sprocket carrier. I think I'll wait until the tires show up to decide. Offset front sprockets are $80 USD, and I can machine the carrier for nothing, so as long as I have clearance from the chain to tire, I'll likely lean towards machining the carrier.
Title: Re: Honda RS1000 - CB400F Mini Replica
Post by: Rick4004 on Mar 09, 2019, 17:43:15
I marked out the shock mount locations, clamped them in place, checked alignment with a thru rod, and tacked the mounts in place. I have a gusset made for the right hand mount, but I'll wait until I get the rear wheel positioned and spacers made before I commit to fully welding the shock mounts. I made the mounts a bit wider than the shock mount to allow for some adjustment. When the time comes I'll machine some spacers to take up the gaps.
Title: Re: Honda RS1000 - CB400F Mini Replica
Post by: Rick4004 on Mar 11, 2019, 18:38:25
Mail today! (actually DHL). I did some research for these Arashi disks, and people seemed to be happy. The price was right compared to new, and at least you aren't getting worn out or bent used samples on Ebay.

I laid out the stock GS disk and a CBR954RR disk in CAD and the CBR disk was going to make the caliper mounting easier to the CBR600F4 forks that I'm using. I need an adaptor to go from the 5 hole GS disk to the 6 hole CBR disk. I 3D printed an adaptor that seems to work well. Once I have everything nailed down I'll machine this out of aluminum.
Title: Re: Honda RS1000 - CB400F Mini Replica
Post by: Rick4004 on Mar 13, 2019, 19:20:39
I 3d printed a prototype caliper bracket to mate the CBR954RR caliper and disk to the GS500 wheel and CBR600F4 forks.
I really hesitated before buying a 3d printer, but after getting it I haven't regretted it for a second. Something like this bracket used to mean a couple of hours programming, and 4 hours of standing in front of the milling machine, and $20 of aluminum.
Now, it's 20 minutes of CAD modeling, and 4 hours of doing something else while the part prints using $1 worth of print material.
Title: Re: Honda RS1000 - CB400F Mini Replica
Post by: Rick4004 on Mar 13, 2019, 19:27:06
Taking .25" off the cush drive was easier said than done. The back of the carrier has 5 drive spokes, so it wouldn't fit in a 3 jaw chuck, or a 4 jaw chuck.
I ended up holding the front of the carrier in a 3 jaw, and machining "backwards". I used a long drawbar thru the spindle to secure the carrier against the cutting force.
Title: Re: Honda RS1000 - CB400F Mini Replica
Post by: Rick4004 on Mar 19, 2019, 14:25:48
Right side rearset and brake finished. The rearset is a prototype that I did a few years ago and never put into production, the pegs/levers are Tec-Bike that I had bought just to check out the quality, (not bad, but not to Tarozzi standards) and the master cylinder is a Yamaha/Brembo from a 1999 R1 that was lying around in the parts bin.

Say what you will about Amazon, but I ordered the remote reservoir on Thursday and it was delivered on Sunday. USA guys are used to quick/cheap shipping, but us in the Great White North are not. Before Amazon, everything took 2-4 weeks to arrive.
Title: Re: Honda RS1000 - CB400F Mini Replica
Post by: Maritime on Mar 19, 2019, 14:44:42
Yep, especially to the maritimes or Winterpeg LOL. Toronto or Vancouver you had next day or 2 day. We've never had that.  Looking great!
Title: Re: Honda RS1000 - CB400F Mini Replica
Post by: Rick4004 on Mar 24, 2019, 17:22:14
Busy week, lots of moving stuff around in the shop getting ready for spring.

I did manage to get the front wheel/disk adaptor from a 3d printed part to a machined aluminum part.
Title: Re: Honda RS1000 - CB400F Mini Replica
Post by: Rick4004 on Mar 30, 2019, 19:24:10
Well, it happens to the best of us. A wasted afternoon of machining. The front side went OK, when I flipped it over to do the backside I got my datums confused when programming, so the the very first cut you see should have been centered around the drilled hole. DOH!

Sometimes when you screw up you get lucky and catch it before it ruins the part, not this time. The center of the raised area needs to be concentric with the hole. Try again tomorrow.
Title: Re: Honda RS1000 - CB400F Mini Replica
Post by: Rick4004 on Mar 31, 2019, 14:47:16
F**k-up salvaged. I thought about it overnight, and decided I could salvage the part. I re-zeroed the part correctly and finished the machining. I then skimmed another 0.20" off the screwed up tower, machined a 0.25" spacer, and welded it on to the tower. Re-mounted the part in the holding jig, zeroed the cutter at the height of the good tower, and took the approx. 0.05" off the spacer.

All good.
Title: Re: Honda RS1000 - CB400F Mini Replica
Post by: Maritime on Apr 01, 2019, 08:52:59
Nice save.
Title: Re: Honda RS1000 - CB400F Mini Replica
Post by: Rick4004 on Apr 24, 2019, 21:20:30
Some progress, finished the tail section. (Besides some minor trimming)
This project is actually a filler project. I am still in the process of hammering out the final finish details on another CB400F that has been a long ongoing project.
If this was going to be polished there would still be some more work required filling in some weld marks, but since I am planning on paint a thin layer of filler will suffice.
Time to start on the gas tank, and painting the wheels.
Title: Re: Honda RS1000 - CB400F Mini Replica
Post by: canyoncarver on Apr 25, 2019, 12:10:32
Nice seat.
Title: Re: Honda RS1000 - CB400F Mini Replica
Post by: JustinLonghorn on Apr 25, 2019, 13:14:56
Purrdy.
Title: Re: Honda RS1000 - CB400F Mini Replica
Post by: Rick4004 on May 07, 2019, 18:16:14
I made some more progress. I finished my buck for the gas tank. I tried something new this time, a blending of old technology and new technology. I 3D printed some components of the buck to go along with the MDF sections. I did a quick video to explain.https://www.youtube.com/watch?v=My5Ptr-greY&feature=youtu.be (https://www.youtube.com/watch?v=My5Ptr-greY&feature=youtu.be)
Not sure why the video is so small?
Title: Re: Honda RS1000 - CB400F Mini Replica
Post by: Rick4004 on May 07, 2019, 18:20:30
Some still shots of the buck, and the patterns laid out on the sheet. 2' x 4' x .080 thick 3003-H14.
Total time into the buck so far is about 10 hours. I got sick of tripping over the tail section buck this week so I sacrificed it to the Gods of Garbage to clean up the shop a bit.
Title: Re: Honda RS1000 - CB400F Mini Replica
Post by: Special K on May 07, 2019, 20:25:45
You da man!!!
Amazing work Rick, I wish I had your skillz!

Sent from my SM-N960F using Tapatalk

Title: Re: Honda RS1000 - CB400F Mini Replica
Post by: Rick4004 on May 10, 2019, 09:32:56
Thanks Special K. But I don't consider myself as having any more skills than anyone else could if they set their mind to it.

In about 2000 I just decided that I wanted to learn how to TIG weld. The local Lincoln dealer was having an open house, they had a Tig welder setup. I had a quick 5 minute lesson, and was welding. I bought the welder and just started practicing.

The next year I bought a small combination lathe/milling machine that I could get in the basement, and learned how to use it. 5 years later I did my research on the internet and converted it to CNC.

A few years ago I decided I should learn how to work with sheet metal. I used my lathe/mill/welders to build an English wheel, bought some hammers and shot bag, and started to work with aluminum sheet. My first gas tank took 2 years and 3 tries, but on the 3rd attempt I had something.

Now my sheet metal skills are improving and it's really a question of speed. What used to take 3 hours now takes 1 hour, and I continue to find better ways to do things.
Title: Re: Honda RS1000 - CB400F Mini Replica
Post by: DesmoDog on May 10, 2019, 11:45:06
I'm just now seeing this, looks like a cool project! Nicely done
Title: Re: Honda RS1000 - CB400F Mini Replica
Post by: Rick4004 on May 11, 2019, 17:32:56
I made some more headway on the gas tank. I got the parts cut out for the bottom and tunnel.
Title: Re: Honda RS1000 - CB400F Mini Replica
Post by: Luugo86 on May 11, 2019, 19:04:05
  I would say you have more tools and machines than 90% of ppl on this site. Nice metal work.
Title: Re: Honda RS1000 - CB400F Mini Replica
Post by: Rick4004 on May 11, 2019, 19:28:14
And, I wanted the indentation on the side of thank for the quick fill, even though I wasn't going to use it. I make up a set of dies from some particle board that I had lying around, and stuck it all in the press.
I had to flatten out (stretch) the material around the perimeter of the panel after dimpling, but all in all it went pretty well. Dies like this are not very strong (I had to anneal the area of the panel that got dimpled) but they only took an hour to make, and you could probably use them a few more times before they gave up the ghost.
Title: Re: Honda RS1000 - CB400F Mini Replica
Post by: Rick4004 on May 11, 2019, 19:36:47
I've been going back and forth on where to locate the battery. The RCB's located the battery in the typical location under the seat, but I've always loved the look of them located in the tail section. This was typically done when running a total loss electrical system where the alternator is removed, and the battery is changed at every pit stop/rider change.
I am probably going to sell this bike after it's finished, so I'm worried that the battery in the tail section might be too out in left field for some potential buyers.

Thoughts?
Title: Re: Honda RS1000 - CB400F Mini Replica
Post by: irk miller on May 11, 2019, 21:36:40
I love it so far.  IMO, any battery location should be a reasonably easy access.  If the tail section provides that, I don't see it being too far out.  I assume we're talking LiFePO4, so there's not a concern to have weight above COG.
Title: Re: Honda RS1000 - CB400F Mini Replica
Post by: Pete12 on May 12, 2019, 08:36:31
Hey Rick, what make of 3d printer did you buy, I'm looking at getting one myself.
Nice work on the bike too, very impressive.
Title: Re: Honda RS1000 - CB400F Mini Replica
Post by: Rick4004 on May 12, 2019, 10:11:41
Pete12 - I bought a Creality CR10. The build size is 12" x 12" x 16"H. Since I bought mine 2 years ago they have done some upgrades, the best one being a filament sensor that stops the print if you run out of filament, and then allows you to start again when you load a new roll. Mine doesn't have that and that's the only negative comment that I would make about the printer. You end up with rolls of filament with just a little bit left on them.
Title: Re: Honda RS1000 - CB400F Mini Replica
Post by: Pete12 on May 13, 2019, 08:09:03
Thanks very much Rick, I'll look for one of them with a filament sensor, much appreciated.
Title: Re: Honda RS1000 - CB400F Mini Replica
Post by: teazer on May 13, 2019, 09:55:28
How about putting the battery under the seat hump to keep the clean look.  Batteries don't need a lot of access for maintenance as long as they are kept charged.  Add a Battery Tender connection to keep it charged.  You could also add a door to the top of the seat for access if you were feeling trick.
Title: Re: Honda RS1000 - CB400F Mini Replica
Post by: Rick4004 on May 13, 2019, 22:57:55
Teazer - I might just put the battery under the seat as you suggest. If I was keeping the bike for myself, I would have it come out the top of the seat, it's a classic endurance race design that I love, but maybe the cleaner look would be easier for resale.
Title: Re: Honda RS1000 - CB400F Mini Replica
Post by: Popeye SXM on May 13, 2019, 23:26:51
I am really enjoying this project, great work. For me a clean look is best for resale, most people will not be thinking of how to change the battery when they first see the bike
Title: Re: Honda RS1000 - CB400F Mini Replica
Post by: Rick4004 on May 23, 2019, 19:42:11
Finally got some time to work on this project again. I got the tank pieces fitted and ready to be tacked together. (hopefully this week). And, my fuel filler arrived! I had a choice if this 80mm one or a larger 105mm one. I picked the small one, but now I wish I had picked the larger one. Oh well.

This is what a days work will get you. I started this morning digging up material, did all the programming, and milling, lathe work, tapping holes, and was done by about 3pm.

The front will get one of those one way vent valve thingies.
Title: Re: Honda RS1000 - CB400F Mini Replica
Post by: Rick4004 on Jun 11, 2019, 18:51:32
Finally got back to doing some more work on this project. I built a painting stand to paint the wheels. The stand makes it really easy to spin the wheel and get even paint coverage. Much easier than hanging them.
The yellow is an aluminum primer.
Title: Re: Honda RS1000 - CB400F Mini Replica
Post by: Rick4004 on Jun 11, 2019, 18:56:43
Someone commented that I had way more equipment than the average builder, so I decided to make this rear caliper bracket by hand. (Well, truth be told I did use a drill press and a band saw. But, as a youngster, I  made lots of parts like this with a hacksaw, angle grinder, and hand drill.
With some patience you can get pretty close to CNC quality just cutting it within 1/32"-1/16" and hand filing the rest of the way.
If you look back to the first picture of the rear wheel you will notice a HUGE rear disk that came on the GS500. The RG250 had the same bolt spacings, so I ordered a rear disk from that bike. Much smaller and lighter.
Title: Re: Honda RS1000 - CB400F Mini Replica
Post by: Rick4004 on Jun 11, 2019, 19:02:40
I thought I'd take a shot of the tank template that I made before I threw it out. If you can make it out of cardboard, it will be easier to make in aluminum. If you can't make it in cardboard without creasing or tearing the cardboard, then that means you are going to have to stretch/shrink the aluminum in those areas.
Title: Re: Honda RS1000 - CB400F Mini Replica
Post by: Rick4004 on Jun 11, 2019, 19:04:23
Overall view of the bike so far. I don't like the look of the CBR600F4 fender, so I think I'll have to make one to fit.
Title: Re: Honda RS1000 - CB400F Mini Replica
Post by: Special K on Jun 11, 2019, 19:29:46
I am really enjoying this thread!
Keep up the good work Rick!
Title: Re: Honda RS1000 - CB400F Mini Replica
Post by: ridesolo on Jun 11, 2019, 21:48:22
It's very enjoyable watching your work! 
Title: Re: Honda RS1000 - CB400F Mini Replica
Post by: Rick4004 on Jun 17, 2019, 20:16:51
I am going to try to make RCB half fairing from aluminum. I needed a windshield to start from so I didn't have to try to make something fit afterwards. I was going to use one from an NS400 since I have an NS windshield and fairing mounted on another bike, and I was going to use that as a starting point. Until I priced out an NS400 windshield. $190USD from Gastaffson windscreens. With shipping thats around $275 CDN. Too much for this cheap ass Scottsman.

I had seen these little quarter fairings all over the internet, especially on Alliexpress for $35-$40USD, and there was one available on Amazon.ca for $60 CDN with shipping. I figured for that much I'd order one and if I didn't use the windshield for this project, I'd use the whole fairing on some other project.

I was pretty happy with the quality for $60. The main body as ABS or polycarbonate, and it is smooth and well finished. The windshield looks like an injected molded acrylic or something. I think I can use it as the basis for my half fairing.
Title: Re: Honda RS1000 - CB400F Mini Replica
Post by: Rick4004 on Jun 22, 2019, 19:17:32
I made up a quick temporary bracket to start the process of building the fairing. Needed to check bar clearance.
Title: Re: Honda RS1000 - CB400F Mini Replica
Post by: teazer on Jun 23, 2019, 17:04:56
The tank and frame mods etc are all so good, that I am just not feeling that fairing.  I just bought one for a much smaller bike and it's great value, but you may want to look at something in the Aitech or Beasley lines that are closer to RCB shape.
Title: Re: Honda RS1000 - CB400F Mini Replica
Post by: Rick4004 on Jun 23, 2019, 19:03:12
I am only keeping the windscreen. I'll use the uppermost 2" or so of the fairing as a pattern to start building the aluminum fairing. Look back to the very beginning of the thread, you will see a CAD model of the fairing. The end result will hopefully be very close to the original RCB upper.
Title: Re: Honda RS1000 - CB400F Mini Replica
Post by: teazer on Jun 23, 2019, 20:18:45
Good.  I was worried there for a minute. :-)
Title: Re: Honda RS1000 - CB400F Mini Replica
Post by: eyhonda on Jul 14, 2019, 10:54:24
Following! Awesome work, Rick!  I thought you had mad skills before, but now you're killing it!   I've been away from here for a long time since I have a HawkGT and VFR8.   Anyway, I also got a 3D printer (Ender 3 w mods) and yes it decreases prototyping times.  I love the metal work going on here!  Any new progress?