how did you get 40 hp out of a ts 250??? I know spend so much money you could have bought a husky (husky is pooh on the road... )
I would be keen to see what you did as my ts although "boltonised" with an alloy muffler and rejetting wasn't overly powerfull.
TS250XE
Porting inlet and exhaust
Inlet piston skirt shortened
COMPRESSION and Combustion shaping
LT250 Quadracer carb (leftover)
Gutting of Expansion Chamber
RM or Aftermarket Silencer
.
TS250 Reed / Powervalved
Porting raise and widened Exhaust
Dual Reeds ( No noticeable difference )
COMPRESSION and Combustion shaping
YZ 250 Expansion chamber slight reshaping
Aftermarket Silencer