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Author Topic: 76 CB360, Of course...this sucks.  (Read 56800 times)

Offline trek97

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76 CB360, Of course...this sucks.
« on: Jul 06, 2011, 23:03:48 »









Mine is the super cool one...sitting behind that weird looking thing.  LOL HA.







BEFORE March 2011










May 2012



April 2012



BEFORE W CLUBMANS



Before stretching




More on the 18 tooth sprocket...This sprocket fit the shaft perfectly, however, the shoulders on both sides you see in the pic makes it way too thick.  I took it to the machine shop.  It is very hard steel.  The cutter at the machine shop wouldnt hardly scratch it.  The grinder they have only removes .005 per cut.  That would take forever and cost a fortune.  So, I took it home and use the 4" grinder to shave off most of the shoulder,  its a little less than 1/8 inch thick and on both sides.  It took me atleast 2 solid hours.  I got it down to .015.  Then took it back to machine shop.  for the finishing.   otherwise its good the bolt holes are correct and the diameter makes it very very close to the clutch shaft and the guard inside...but it does clear, atleast it did on my bike.  and it was all worth it to me, drastically reduced rpms at higher speeds and I really dont notice a change at take off...I also dont drag race the thing from a standing stop.  Great for cruising @ 70 mph.  Runs about 3700 @ 55 mph.  But if your a stop light hot rod you may not like it.  I ordered through the Honda shop its from Parts Unlimited # K222520  cost about $19.00
« Last Edit: May 02, 2014, 23:24:20 by trek97 »

Offline ChimeraMW

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Re: SWING ARM STRETCH, 76 CB360, How do you like it???
« Reply #1 on: Jul 06, 2011, 23:08:52 »
The stretch and chain look good!
http://www.chimeramotorworks.com - Coming soon
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Offline hond cb350e

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Re: SWING ARM STRETCH, 76 CB360, How do you like it???
« Reply #2 on: Jul 06, 2011, 23:11:22 »
what swing is that off

Offline trek97

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Re: SWING ARM STRETCH, 76 CB360, How do you like it???
« Reply #3 on: Jul 06, 2011, 23:24:34 »
I made it myself using the original stock swing arm.  added 4" to the front bushing end that attaches to bike frame.
Here is more details about the swing arm work.
Since posting mine.  I have had alot of people PM me.  About their Swing arm stretch projects and experiences.  It would be GREAT to see your pics.  Before, During and After shots.  If it was DIY like mine, or you TRUSTED and PAID somebody else.  I am real interested to see how you guys approached it.  Heres what I did to add 4 inches.
BEFORE STRETCH
 
Before welding,got the tubing from speedymetals.com about $30 incl shipping. they have great selection I was able to get the same size and thickness tube as honda used.  best for wire welding.



The numbers are now meaningless, thats what I had after notching myself, not even close to right.  Machine shop touched em up and made them perfect.  All 3 corrected to be right.  If its not perfect...try again.  check and triple check measurements as your welding.  check for warping.  your ass will be riding on these welds.  My friend did the welding for me, I trust his welds.  I WOULD DIE ON MY WELDS.  He is educated has a certification...his welds have reason and purpose. 

After welding w new bushings ready for install.  Machine shop bored tube correctly for bushings.

Out with the old in with the new...Halfway through swap. 

End result.  Rides great, new bushings helped that.  New chain, longer shocks from DCC lowered it a bit but not much, modified a brake lever connector rod using longer one off 69 CL350 sprint.  Had it up to but never over 80 mph on good straight road.  Barely noticeable in cornering.  I dont take hard turns at high speed anyway.  Im a 44 year old dad.  pretty conservative rider.  I am delighted it actually worked and I didnt have to scrap it. 

My only advice...Dont try this, dont over estimate your own welding ability,  dont try to cut corners,  your friends may brag about their abilities,dont trust me,dont trust anyone...if you are crazy enough try something like this, and ANYTHING about the entire project is questionable or not ABSOLUTELY PERFECT.  Do the smart thing...Just scrap it.  Put the bike back together as it was.  It wouldnt be worth GETTING HURT.

cracks should scare you.   I did not cut the arms.  I think it could, and would be disastrous.  I believe compromising the integrity of the original arm is a bad idea.  I gained my length on the bushing end.  I measured the original swing materials using my digital caliper, and ordered the new steel to the exact thickness specs.  (Welding 2 pieces of different thickness material together is not ideal.)  A good and trusted friend at the machine shop cut and fit the steel, perfectly.  My best friend, who is an educated welder w a certification did all the welding on my patio while I watched, double checked and measured.  I was not about to blindly trust "god knows who"...If he or I had any questions about the entire project it wouldve been scrapped immediately. 
The swing arm floats, so it really does not support any weight per se.  The weight of bike and rider is transferred from the frame through the resistance of the shock springs to the axel, bearings, hub, up through spokes, down around rim, through the tire and to the ground.  HOWEVER, Even though the arms are "connected" to one another through the axel.  The arms will twist and flex a bit.  Due to the fact that each shock is somewhat  independent of each other.  This twisting and flexing minor as it may be. eventually will cause breakage at the weakest link...anyone care to take a guess where?  At the EXACT point these guys are cutting and welding.  Espeacially if the welded parts are of different thickness.  The heat needed for good penetration on the thicker steel will harden the thinner.  Causing it to become brittle.  OR,  if its welded at a lower temp setting for the thinner material, it will not penetrate the thicker deep enough.  The bead will literally just be sitting on top of the thicker metal.

Also there are more pressures placed on the arm.  Pushing and pulling.  The arms are constantly being compressed by the force of the rear tire pushing the bike forward.  Not to big of an issue with these small lightweight bikes w little horse power.  However,  The pulling apart force generated every bump and pot hole we hit.  could be tremendous.  Pulling that arm free of the rest of the bike and you. If one cuts and welds those arms I wonder where its gonna pull apart, after hitting that pot hole at 80 mph while passing that big truck.
I can write alot more...If you like?  Its your ass on that thing.  I recommend you dont do it.

Rear Fender mount....

  A couple guys have contacted me about the rear fender on swing arm.
I have plans to improve it this winter.  Right now its kinda scabby.  I was ready to ride so I just threw it on there in about 30 minutes.  its held up real good though doesnt rub and haven't  touched it since install.


This is the original cb360t front fender.  I had ground the rivets off to remove the brace rod.
So, I had to dig brace out of the garage.  I couldnt believe I kept it.  I cant believe I found it.

My plan is to hide the brace rod behind the shocks for a cleaner appearance.  But to get it on the road this is what I did.

The brace rods are about an inch short of what I needed for tire clearance.  So I cut and drilled little tabs to add the height I needed (first scabby part,  I intend to re-do nicer this winter.


Next I cut front mount from piece of sheet metal.  and drilled and tapped swing arm sheet metal.  1/4-28 bolts.  I used fine thread cause the swing arm steel is pretty thin.  This bracket could also be nicer looking. 

Moved tail light from bracket behind seat to fender cause it left a big gaping hole.  So taillight fills 2 1/4" gap tween seat and fender. 



also all the electronics (rect, regulator, solenoid are hid under seat.)


so thats it. PM me if you have any more questions
« Last Edit: May 06, 2012, 22:11:18 by trek97 »

Offline Hellcat450

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Re: SWING ARM STRETCH, 76 CB360, How do you like it???
« Reply #4 on: Jul 06, 2011, 23:40:28 »
Like it, alot!

And the engine is very...eer..red? :P

Good looking bike imo, great work!
You devalue everything, you cheapen the world when you sing.

Offline ProSimex

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Re: SWING ARM STRETCH, 76 CB360, How do you like it???
« Reply #5 on: Jul 06, 2011, 23:43:13 »
looks good! thats a very red engine you have there!
"Love is the feelin you get when you like something as much as your motorcycle."

"That's got CV's? Take a #2 phillips screwdriver, heat the tip with a torch until cherry red and plunge it into your eye. It will hurt less. Really."- Kopcicle

Offline trek97

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Re: SWING ARM STRETCH, 76 CB360, How do you like it???
« Reply #6 on: Jul 07, 2011, 00:00:46 »
LOL...The original engine finish was totally blemished and messed up.  And I was really putting alot of thought into the paint scheme for the whole bike.  I went to bed and "literally"  I had a dream....the tank and fenders were satin graphite and the engine was "RED".  So I sandblasted the engine and...you can see what happened next.  Thanks for looking.
« Last Edit: Jul 07, 2011, 00:02:55 by trek97 »

Offline Hellcat450

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Re: SWING ARM STRETCH, 76 CB360, How do you like it???
« Reply #7 on: Jul 07, 2011, 00:12:31 »
Actually, I think the red on the engine works.
If I only saw the engine out of the bike I would wonder what maniac painted it all red, but in the bike it really works with the other colors somehow.


Again, great work on the bike :)
You devalue everything, you cheapen the world when you sing.

Offline PHeller

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Re: SWING ARM STRETCH, 76 CB360, How do you like it???
« Reply #8 on: Jul 07, 2011, 12:25:28 »
I think the all red engine looks kinda funky.


Maybe some let some raw aluminum show through? Fins, stator cover, that kind of thing.


The swingarm looks good though.

Offline beersnchicken

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Re: SWING ARM STRETCH, 76 CB360, How do you like it???
« Reply #9 on: Jul 07, 2011, 12:44:36 »
Stretch looks really good, I'd blast that engine 1 more time and paint it black though.
B&C

Offline MitchellSK

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Re: SWING ARM STRETCH, 76 CB360, How do you like it???
« Reply #10 on: Jul 07, 2011, 13:34:40 »
Looks good. Hide the battery & electronics to open up the frame.

Post a "before" picture.
or Motion Photos On Facebook
Sold all my bikes :(
Bike-less at the moment in a great place to ride. Moved cross-country to Santa Rosa, CA near HWY 1

Offline dirtbag

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Re: SWING ARM STRETCH, 76 CB360, How do you like it???
« Reply #11 on: Jul 07, 2011, 13:40:48 »
Perhaps ditch the rear fender too.
'75 cb360
'79 RD400
'06 GSXR 750

Offline Jake73

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Stretch looks hawt.

Offline reelinfeele

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Looks awesome. It proBably doesnt wheelie anyway. How does it handle?
I feel sorry for people that dont drink. When they wake up in the morning, that's as good as their gonna feel all day.

Offline eriksz

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looks pretty good, engine is def unique but goes with the colors