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  #1 (permalink)  
Old 05-02-2010, 03:47 AM
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76 or 77 Yamaha 750 special help

I will be buying a 76 or 77 yamaha 750 from a buddy of mine this thursday for little of nothing and wanted to do some work to it. This is about the only forum i found that had any people who had worked on this bike.

My main concern is cutting the rear section of the frame off. I've seen a few mock ups of how to do it, but does anyone have a link to a build. I searched and found 2 but they dont follow what i've been seeing. I lost the link i had that showed it done by relocating the shock bolt and using struts...which im opting for.

Good thing about the bike is it runs, just needs some tlc.

Any help would be apreciated.

Thx in advance
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  #2 (permalink)  
Old 05-02-2010, 09:05 AM
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thats easy, just make a strut to fit where the shock goes, make it to the length u want to give you the bike heigth you are after.


www.wickedwillychoppers.com
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Old 05-02-2010, 10:20 AM
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Hi bigboi18184

How about "Konging" the frame?

LINK

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Triking and being a "Sarky Bastid" - it's a way of life!
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Old 05-02-2010, 06:27 PM
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I like that link thx, dont like the seats though i wonder if i could cut off the rear secton and throw a bobber style seat on it.
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Old 05-05-2010, 09:25 PM
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Went and looked over the bike real good with at my friends house today and determined i would just hard tail it. Doesn't look to hard, seems to just cut off the sub frame and weld from the front bar to the shock mount. Seems a little different from konging, but all I'll need is longer tubing to go the shock mount.....same principal ( i hope )

Also need to find something on relocating the foot brake and shifter. My search continues and my chop starts next friday.
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Old 05-05-2010, 10:25 PM
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Don't forget to post pictures up here, we like pictures :-)

Tink
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Triking and being a "Sarky Bastid" - it's a way of life!
Reliable - apparently!
mizzo b'stard - official.
'81 LH (4W1) Trike - "The Outcast"
'79 SF (3H3) project
JUST SAY NO
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Old 05-06-2010, 06:57 AM
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Changed my mind up a bit, found a Honda CB 400 hawk in the paper today and decided to do it as my build since its chain driven and let my buddy buy the Yamaha and do it for his build.

Going put up some pics tomorrow of both of them. Their both bone stock and in relatively good condition other than a few rust spots. Both of them ran before being sat up for a year or so. So im hoping to clean the tank, carbs and lines out and try to start them up soon.

Anyone know what size rear tire will fit on the cb400 with no mods? Seen 140 somewhere online but cant be sure whether it was for the hawk or not.

Supposed to start chopping them up either tomorrow or next Thurs. This should be fun lol, seen a build on another forum that only took the guy 10 hours and looked pretty good. Going for that time frame hahaha
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Old 05-06-2010, 11:49 AM
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Well went and checked out the Honda and gonna get is for $125, and it comes with the original tool kit. Should start tearing them down sometime tomorrow, first order of business is to clean the carbs and tank and get them running.
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Old 05-06-2010, 03:51 PM
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[IMG][/IMG]
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The lights come on as they should when i kick the motor over so i atleast know the electrical is wired right. $125 wasn't bad either, he said he put 1k miles on it before he bought his new one and this one just sat in his shed for the past 4 years. Going to hard tail it....throw a seat on it and prolly ride it like that. Not wanting to tie up too much $$$ in it, prolly no more than $1-2k all said and done.

Last edited by bigboi18184; 05-06-2010 at 06:19 PM..
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Old 05-06-2010, 10:27 PM
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Well well well i just cant seem to make my mind up... was going to do hard tail but after seeing this beauty here i may keep the shocks after all and just run some apes and a solo seat. BTW this is the CB 550 but frame looks exactly same a cb400 and the bike pictured has a powder-coated frame and tank. This is one i was looking to buy for $700 the other day.....its on Dallas craigslist.


[IMG][/IMG]

[IMG][/IMG]

Has anyone ever tried to put an 11" shock on this bike or any bike that wasn't specifically made for it? Just curious before i order a set....may buy a cheap set from auto zone and if it don't work takem back....here's what i was thinking.

OEM cb400A shock :



Aftermarket 11" shock :

[IMG][/IMG]

This would be a 2" drop in the rear.



AND


i did find a universal hard tail for $125

http://www.tcbroschoppers.com/store/...products_id=10

Last edited by bigboi18184; 05-06-2010 at 10:54 PM..
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Old 05-06-2010, 11:05 PM
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I'd say it depends on the look your going for. I'm a die hard fan of dual shock chops cuz they're rare. They're rare because the right shocks to use when stretching are expensive. (about $1200 for a good pair of nitrogen gas shocks)
With a 400cc bike, I wouldn't expect you to be doing too much long distance traveling so hard-tailing is a much more reasonable solution.
Either way you decide to go, your in the right place for advice. Just make sure your buddy that bought the 750 gets on these forums. There's always room for one more tripler
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Old 05-07-2010, 03:03 PM
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750

Build it as a streettracker look up mule bikes.com

olddude
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