Ok all you fourstroke fans owners of the kfx 400 and ltz 400 i have what you've been looking for.i have done the home work and research.
we will soon be building 460 bigbore kits,these kits are going to be so trick,they will come complete with upgraded valve springs new cams,and a two stage sleeve setup.there will be a a steel liner with a aluminum liner inside that which will be ceramic plated.we haven't got everything finished and dialed in yet,and the dyno testing will be next week and i will be sure to post more numbers and more specifics on the components after the testing is done.
we do expect over 50 hp out of this setup.