surely the costs involved are huge , oneoff pistons ,stroked cranks oneoff exhausts . wouldnt it be cheaper and easier to sell your kx engine and fit a MTH or Zabel 700 . these can be picked up for ?1000 ($1900) and produce 85hp as standard also all the r&d is already done so no problems with carbs,jetting,exhausts etc mind you theres a guy in Oz working on a turbo f/injection cr500 !