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Buell Motorcycle Forum » Old School Buell » Archive through November 19, 2009 » Need help with Keihin CV carb « Previous Next »

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Riddle66
Posted on Monday, November 09, 2009 - 06:45 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

I have a chopper with a 99 Cyclone 1200 on it. It keeps fouling out the plugs. At idle it runs good for a good while. If you take out the plugs they are covered with carbon. Accelerate and black smoke comes out pipe. I think carb is extremely rich. I don't know any history on bike, just bought it as a project. It has straight pipes on it if that changes anything. Thanks for any help.
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Brinnutz
Posted on Monday, November 09, 2009 - 09:54 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

If you would have left the motor in the Cyclone frame and not chopped it, you wouldn't have these problems. Problem solved.
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Jayvee
Posted on Tuesday, November 10, 2009 - 12:37 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

First see what jets are in your carb.
Assuming it's a Keihin.
Straight pipes are only going to work well at full throttle, so you might consider what you will be using the bike for, drag racing? Or Street? If street, second, get a muffler.
In the meantime, check out this list of links to various methodologies of tuning the CV carb: http://xlforum.net/vbportal/forums/showthread.php? t=491296
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Jasonl
Posted on Tuesday, November 10, 2009 - 01:56 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

I'm with Brinnutz. Not a fan of destroying good bikes to build mongrels.
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Skntpig
Posted on Tuesday, November 10, 2009 - 02:50 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

Get a muffla. You won't be able to tune it with your drag pipes.

Find a used cyclone frame and convert it back. The bike will Stop, Go, AND TURN!
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