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Blood Sweat Tears and Grease => Projects => Restorations => Topic started by: clem on Oct 18, 2015, 21:51:19

Title: CT70 Resto
Post by: clem on Oct 18, 2015, 21:51:19
I feel like I have a knack for picking up the worst piles of you know what to try and do something with. This one is no different. It was pretty horrible when I got it. I only paid $80 bucks for it and the deal should have gone the other way, I should have been given $80 for the haul away charge. Any way I am going to do a full restoration on this one. I may put off the engine for a bit since we have a XR70 that nobody uses and that engine may fill in for awhile until I can tear down and rebuild the original. Here are a few pics of the mess.
Title: Re: CT70 Resto
Post by: clem on Oct 18, 2015, 21:57:37
Pretty much everything but the frame, hubs, upper triple, swing arm and gas tank(it's plastic) will have to be purchased. Some has been bought and since I'm pretty much done with my DS7 I'll start dumping money into this dump. This is going to be my neighborhood ride to compete with the golf carts and what not that litter my streets. I was able to pick up a very good speedo from ebay for very cheap so I was pretty stoked on that. New fenders, rim halves and street tires are here.
Title: Re: CT70 Resto
Post by: Hurco550 on Oct 19, 2015, 21:23:30
im digging it man
Title: Re: CT70 Resto
Post by: clem on Oct 19, 2015, 23:25:25
Thank you dude. I dig these funky little bikes too.
I got a few more parts today. Wiring harness, seat hinge bracket, swing arm pivot bolt and the long air box cover screw...small details. I may buy new bars and switches next so that I can close up the headlight bucket.
Title: Re: CT70 Resto
Post by: Hurco550 on Oct 20, 2015, 10:52:25
I have a 79 z50 on the way =) I am enjoying watching these little bikes being built =)
Title: Re: CT70 Resto
Post by: canyoncarver on Oct 20, 2015, 13:34:01
Damn dude, you jumped right into this one.  Cool little bikes. 
Title: Re: CT70 Resto
Post by: clem on Oct 20, 2015, 23:14:20
Yeah, I've been having this for a few years. I figured if I started  a thread that I might actually do something with it.
Title: Re: CT70 Resto
Post by: clem on Oct 31, 2015, 23:30:09
I put off buying the new handlebars and switches to make this thing a roller. It's getting there slowly but so far I think it's a good improvement. It's kind of nice to not have to weld, cut and grind stuff up for a change.
Title: Re: CT70 Resto
Post by: clem on Nov 30, 2015, 21:33:52
I got as far along as I could before Christmas season. I got the handle bars, cables, throttle assembly and a few other things. I'll start tearing the engine down while it's the giving season. I'm sure the pics of the engine will be a horror show so we'll  wait until after Christmas has passed.
Title: Re: CT70 Resto
Post by: DohcBikes on Nov 30, 2015, 22:27:36
Gorgeous
Title: Re: CT70 Resto
Post by: 5ivemoto on Nov 30, 2015, 23:48:38
Looks sharp. Super interested to see you get into the engine! Spell it out so I can use this as a ct70 for dummies kinda thread! I've got one looming in the garage.

Anyway diggin  the build. Rooting for ya.
Title: Re: CT70 Resto
Post by: clem on Nov 30, 2015, 23:59:16
Would have been cool to have this version in the states.
Engine build will be a learning experience for me so we'll see how it go's.
Title: Re: CT70 Resto
Post by: clem on Nov 15, 2018, 22:57:29
So it's been a little time since the last post but I've gotten busy on this one again. Took the engine apart and it was messy. Years of grime and found sludge and some light corrosion on the inside. Piston was stuck, shift drum was stuck. I took it down to split the cases. I have them cleaned up and have new case screws on order to replace the existing fasteners. The shift shaft was bent so a new one along with the kick start shaft is on order from honda. I picked up another shift drum from the bay to replace what I currently have. The shift forks have wear marks so I need to replace them. Bad part is that the guide pins will not come out of the forks. I'll post up more step by step when it goes back together. It was to dirty to be picking up my phone for the teardown.

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Title: Re: CT70 Resto
Post by: clem on Nov 15, 2018, 22:58:52
More picks of the dirtiness.

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Title: Re: CT70 Resto
Post by: trek97 on Nov 16, 2018, 08:36:56
Oh my gosh dude, that thing was a mess.   :o
Title: Re: CT70 Resto
Post by: advCo on Nov 16, 2018, 09:33:26
Right on man, I had no idea this thread existed. Looks like we're both suckers for saving the mini trails. I can't decide which one of us was worse off when we started  ;D

I almost bought a DAX a year or so ago. It was pretty roached the guy only wanted a couple hundred for it. We were about to make a deal when he sold it to someone else.

You going big bore?
Title: Re: CT70 Resto
Post by: canyoncarver on Nov 16, 2018, 11:45:12
Mmm, crusty.
Title: Re: CT70 Resto
Post by: 1fasgsxr on Nov 16, 2018, 13:10:08
Wow that was nasty! 
Title: Re: CT70 Resto
Post by: Maritime on Nov 16, 2018, 13:18:26
nothing like starting with a real pile of crap eh? looking much better now
Title: Re: CT70 Resto
Post by: clem on Nov 16, 2018, 15:59:48
Right on man, I had no idea this thread existed. Looks like we're both suckers for saving the mini trails. I can't decide which one of us was worse off when we started  ;D

I almost bought a DAX a year or so ago. It was pretty roached the guy only wanted a couple hundred for it. We were about to make a deal when he sold it to someone else.

You going big bore?
I thought about an 88cc kit since the cylinder is toast and the end of the muffler is stuck in the head. I wound up buying a used head only to find screwdriver marks where a monkey tried to pry the cam chain cover off. I could probably still use it but I'm leaning towards the CHP 88cc kit with the head, cylinder and carb. I was trying to keep it all original Honda but that may not be possible while still doing this for a reasonable price.
The CT's are rad for sure and it seems like they are hard to come by down here. I would like to find another one to do a custom build with a big Chinese motor in it that I won't mind thrashing on some trails. That's kind of the thought I had for a mini trial challenge. Find a cheap bike, get it running and reliable, take it on a long two or three day trail ride while doing some camping. I figured you could earn points for every dollar your bike costs below a set amount then get points for reusing crusty parts, swapping or donating parts to competitors and maybe points for every mile you do on the trail ride before a mechanical failure. The guy with the most points at the end of the ride is crowned Mini Trail Champion.
Title: Re: CT70 Resto
Post by: clem on Nov 16, 2018, 16:01:25
More pics of the head, shift forks and re usable items. Old and "new" head.

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Title: Re: CT70 Resto
Post by: clem on Nov 16, 2018, 16:02:44
Few more of the shift forks. Look like one needs to be replaced.

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Title: Re: CT70 Resto
Post by: advCo on Nov 16, 2018, 16:36:30
I thought about an 88cc kit since the cylinder is toast and the end of the muffler is stuck in the head. I wound up buying a used head only to find screwdriver marks where a monkey tried to pry the cam chain cover off. I could probably still use it but I'm leaning towards the CHP 88cc kit with the head, cylinder and carb. I was trying to keep it all original Honda but that may not be possible while still doing this for a reasonable price.
The CT's are rad for sure and it seems like they are hard to come by down here. I would like to find another one to do a custom build with a big Chinese motor in it that I won't mind thrashing on some trails. That's kind of the thought I had for a mini trial challenge. Find a cheap bike, get it running and reliable, take it on a long two or three day trail ride while doing some camping. I figured you could earn points for every dollar your bike costs below a set amount then get points for reusing crusty parts, swapping or donating parts to competitors and maybe points for every mile you do on the trail ride before a mechanical failure. The guy with the most points at the end of the ride is crowned Mini Trail Champion.

That would be awesome. And I agree about using Honda parts, I always try to but the aftermarket piston/cylinder kits are so cheap it almost doesn't make sense to use OEM honda and get the cylinder bored, etc. Beatrice Cycles has the CT70 88cc kit on sale for $100 right now. http://dratv.com/88ctalalc7.html

I've been debating whether or not to go with the 88cc on my z50, but since I've never ridden one I'll probably do a hone and rings and save the upgrade for later.

Sucks about the second head, a good welder or some JB could probably fix that  ;D. I wonder if you ran a weld bead around that exhaust collar it would loosen itself up.
Title: Re: CT70 Resto
Post by: clem on Nov 16, 2018, 18:47:46
The standard bore OEM Honda cylinder is $115 at Partzilla. That's not bad for the quality. I have an new OEM muffler for it also and from what I've read, it's not much of a performance killer to have the stock exhaust with the 88cc kit. I still have a little time to decide on which way to go. I am just trying to get the bottom end closed back up so that I can mount it in the frame and put the kickstand back on the bike. After that I am going to take it one parts fiche at a time and finish it up. I don't really need a whole lot of parts to finish it but the ones I do need are the more expensive ones like a new seat, tail light/bracket and ignition switch.
Title: Re: CT70 Resto
Post by: Brodie on Nov 16, 2018, 20:19:19
I would recommend the 88cc kit.

Out of my 3 Zeds the 125 is the funnest to ride. The 160 is too much power for the size and the stock 50 is fine to cruise on but any incline has me pushing with my legs as well.
Title: Re: CT70 Resto
Post by: canyoncarver on Nov 16, 2018, 23:40:14
... The 160 is too much power for the size ...

I did not think this possible.
Title: Re: CT70 Resto
Post by: Luugo86 on Nov 17, 2018, 06:31:07
I did not think this possible.


  haha I agree
Title: Re: CT70 Resto
Post by: Brodie on Nov 18, 2018, 01:23:41
Ha yeah that is what I thought. Maybe if I stuck some bigger tyres on but at the moment when you are flying along at 100kph a few cm from the ground and can stand the front wheel up by twisting the throttle quickly it gets a bit sketchy.
Title: Re: CT70 Resto
Post by: clem on Nov 26, 2018, 21:56:27
More updates: ordered a bunch of parts and got all but one part in. It just happens to be the kickstart shaft on back order and the cases can't be closed up until that's in. Bummer.

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Title: Re: CT70 Resto
Post by: clem on Nov 26, 2018, 22:18:49
New parts. I've also noticed over the course of the last few years that this project has sat that Honda is starting to discontinue more parts for these bikes. I must have gotten some of the last rim halves back then. The key switch is still available from Honda so I picked one of those up before they go discontinued also.

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Title: Re: CT70 Resto
Post by: JustinLonghorn on Nov 27, 2018, 09:23:05
In.
Title: Re: CT70 Resto
Post by: cxman on Nov 27, 2018, 14:30:35
its not to late i have a spare 350/4 motor
Title: Re: CT70 Resto
Post by: canyoncarver on Nov 27, 2018, 14:38:09
Nice effects pedal setup....
Title: Re: CT70 Resto
Post by: clem on Nov 27, 2018, 20:11:10
its not to late i have a spare 350/4 motor
That would be insane and lethal.

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Title: Re: CT70 Resto
Post by: clem on Nov 27, 2018, 20:13:06
Nice effects pedal setup....
Ha, yeah I dig the route 66 pedal. Its OD and compression with a clean mix for both sides. That and the carbon copy are probably my two favorites. I might have to grab a good flanger and go all Cure on everybody.

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Title: Re: CT70 Resto
Post by: advCo on Nov 28, 2018, 09:19:56
Ha, yeah I dig the route 66 pedal. Its OD and compression with a clean mix for both sides. That and the carbon copy are probably my two favorites. I might have to grab a good flanger and go all Cure on everybody.

Carbon copy is one of my favorite pedals in my arsenal. MXR makes great stuff, I have their phase 90, boost pedal, and a modded blue box that sounds like the guitar solo in D'yer Makr when you crank it.
Title: Re: CT70 Resto
Post by: JustinLonghorn on Nov 28, 2018, 11:30:16
I'm a bass player (well, I was a bass player), besides a tuning pedal, the only pedal I ever used was a Big Muff Pi.
Title: Re: CT70 Resto
Post by: clem on Nov 28, 2018, 14:00:18
Justin you will always be a bass player. You can't get out of that.

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Title: Re: CT70 Resto
Post by: Hurco550 on Dec 03, 2018, 12:54:19
Justin you will always be a bass player. You can't get out of that.

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I played rhythm guitar for 15 years or so, got stuck in a plateau skill wise and switched over to playing bass. I enjoy it, but it was an unpopular transition, going FROM guitar TO bass haha.

I guess in the end, I really just wanted to be like Jussy..