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Who makes a good honda 400ex 460cc big bore kit?

7K views 3 replies 4 participants last post by  bako700r 
#1 ·
And how much are they? Is there a difference between a stroker or a big bore kit. If there is which on is better?
 
#3 ·
Unless you are doing a drag only set up don't do anything bigger than the 440 reliability goes out the window. Full system, get rid of the air box ( if where you ride isn't water/muddy) take the choke plate linkage and plate off. Get a #42 pilot jet, and rejet the carb ( stock jets are a 38/148) head work with a cam. It becomes a whole new bike. Just did my brothers last night. Runs 10x better :thumb:
 
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