400ex mods?
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A Keihin FCR 39, 40, or 41. The bigger the more top end the less bottom. It seems like most guys go for the 39 or rhte 40, I have the 39. I got it from Curtis Sparks Racing. I run the thumb throttle on it. The Hot Cams are getting some bad reviews by a few people, an old design. I have one and have zero problems with it. I have the stgage 2. With a Hot cam you don;t need to harden the rocker arms($250), you do with most cams. There is a thread called "440 Pros and Cons". I posted a detailed post for a few scenarios and the rough pricing for each. Good Luck, feel free to ask me any questions.
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sparks racing is in california.
go to www.cdracingonline.com
this place will be able to hook you up on what you need. they will answer questions. they do sell sparks products, hotcams, and many many others. they have a lot more than what they have on their site. the # is 308-696-7805
go to www.cdracingonline.com
this place will be able to hook you up on what you need. they will answer questions. they do sell sparks products, hotcams, and many many others. they have a lot more than what they have on their site. the # is 308-696-7805