Help! Please!

my sons bike only has a mild port clean up, and if i remember right, ken may have done the head mod last time he had it ?????
mine is ported and head mod, with all the other goodies too
so that may be the secret, but it's kens secrets not mine, hahahaaaaaa
 
go to his website im pretty sure its 150 for port and 60 for the head but dont quote me on that
 
just click the link at the bottom of my sig, well worth every penny !!!!!!!
 
I may have a similar problem. When I am in the top gears especially 6th I get more acceleration with my THUMB at half throttle. I hope it is a dirty carb thing. I put in some seafoam after I rode a little tonight I really hope it helps. If not I will be cleaning the carb. If that doesnt help I guess the reeds are next. Am I on the right track?

Also I sometimes get what sounds like its hitting the rev limiter but if I let off the throttle then get back in to it it will climb past the rpms that it was sounding like rev limiter. I have no Idea what this could be or if it is related to the WOT slugishness.
Any advice would be apprciated.