Just noticed my 01 gg300xc has the A cyclinder as is stamped on the back of the cylinder. The piston I ordered and installed was the vertex D piston. the vertex catalog says stock bore is 72 and my piston is 71.97 where as their A piston is 71.94 not a huge difference but is my motor about to be toast Ive only run the bike maybe a max of 20 minutes no real riding just putting up and down the street to make sure of no funny noises. The only oddity I have noticed is when revving the bike the rpms dont hang they immedietly come down once off the gas, is this normal with a fresh topend. I havent rode the bike in quite a while as I've been spending time on my rm. Any help is greatly appreciated.
How screwed am I ?
- Thread starter wheels7
- Start date
ok well i pulled the head and noticed the piston i have is the a piston the box was mismarked as my piston says on the top A 71.94 so im good there. Does anyone know about the rpm coming right down with throttle no run on? could it be the powervalve because I havent been able to see if the bike has any top end power. it seems very strong off the bottom.
Gonzo
New member
My 250 doesn't tend to run on much for a stroker. And mine's also strong off the botom. I've got the supermoto and can quite happily pull away in 2nd/3rd without any problems and accelerate from 25mph in top without any bogging.
Just run it. Mine's been so reliable, I keep wondering if I'm doing something wrong!
Just run it. Mine's been so reliable, I keep wondering if I'm doing something wrong!
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