Topic: Flat 4 into 1 exhaust

[Mantree]

I have been building a 72 cb750 into a touring bike for my girlfriend starting with lowering the bike back to a reasonable hight (PO had installed +4 forks on and I had trouble touching at 6'6).  Now I am having trouble with the home made 4 into 1 scrapping on speed bumps.  I was thinking of using a flat 4 into 1 collector to save vertical space.  I was hoping that someone else  had a  set like this that I could look at.  I'm also looking at lowering the rear just a bit because with the cb550 forks the front I about 1" short now (rider is 5'4) and I need to shorten the center stand and kickstand (90 deg with the kickstand down and takes 3 people to get it on the center).   

[heffay]

sounds like it's still quite a hack job... buy stock parts and stop suffering... and stop riding over speed bumps.
i know, not what you wanted to hear... but if you're 6'6" and can't lift the rear off the ground, well um...

[Retro Rocket]

Scroll down to the bottom of the page in the link, you can buy the flat collector from these guys....

http://www.coneeng.com/collectors.html

[Stev-o]

The Kerker exhaust hit on speed bumps on my stock K5....

[jdubb1977]

My Kerker scrapes a bit also ('76 750F).  My easy solution is to take the bumps slow & at an angle. 

[madmtnmotors]

CycleX has some sidewinder exhaust options as well, both 4 into 1 and 4 into 2:

http://www.cyclexchange.net/Honda%20SOHC%20High%20Performance%20Exhaust%20Page.htm

[Don R]

Check out an F2 header 77/78 factory 4 into 1. They're pretty flat and can fit a K. The 75/76F do not fit with a drum brake pedal.

[Mantree]

Thanks retro rocket I spotted that was 1 option I was thinking as for not getting the rear up the center stand has been cut and extended with a custom kick to help with the pos mods now that its up the rear is almost 5" off the ground.  I did find this set up that I think I will copy
http://home.earthlink.net/~castleman/pipes.html
Sorry for the late reply taptalk isn't letting me know that I have had responses

[Mantree]

Has any one done scrambler pipes before

[Hon3ybadger]

I have a picture of F2 pipes on my projects thread. 76 cb750 F1 brought back from the grave. Dont ask why I have F2 pipes with an all F1 bike but it works.

[Mantree]

Thanks I actually found stock 4 into 4 pipes from a 74 750k now I just need flanges


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[Lostboy Steve]

I have been building a 72 cb750 into a touring bike for my girlfriend starting with lowering the bike back to a reasonable hight (PO had installed +4 forks on and I had trouble touching at 6'6).  Now I am having trouble with the home made 4 into 1 scrapping on speed bumps.  I was thinking of using a flat 4 into 1 collector to save vertical space.  I was hoping that someone else  had a  set like this that I could look at.  I'm also looking at lowering the rear just a bit because with the cb550 forks the front I about 1" short now (rider is 5'4) and I need to shorten the center stand and kickstand (90 deg with the kickstand down and takes 3 people to get it on the center).

I actually like the way the flat collector looks.

[Jerry Rxman Griffin aka MuthaF'er]

Either a F0/F1 or a F2/F3 header.