Finally!!! I am going to put this motor back together this weekend. Rebuilt the top end of my 99' Sport 400. Also, I bought a sport port kit from race logic and had my friend do all the machine port work for me. Therefore, I would think I would need to rejet the carb? What size do you think? Or will I be ok w/the stock since I have not done the aftermarket pipe and clutch kit yet, that is next.

 

Watch out for detonation with the stock pipe until you are able to get another one. As a rule of thumb, I always either move the clip down a notch on the needle or go up one size on the jetting. Most of the time you'll end up where you started, but get it broke in first. Bubba

 

with the stock 34 mm carb,stock pipe (that sux) start at least at
240-250 main jet,needle raised one notch (drop the clip)your next step then is reeds.

 

I am replacing the reeds with Boyesen dual pedal, low thru mid range power.