I stroked the stock v1Lks engine using a v1 race crank. Upgraded small and large end conrod bearings. Hybrid ceramics bearings in the case. 4 pedal reed block milled out to fit v-force 8 pedal Banshee reeds. Power jetted tm28. Flat cut race gears and roller bearing clutch bell. Lightened stock clutch with blue springs. Mars cut high comp head. Llightly ported 90cc brn kit. Many thanks to Devin from MLM, Ian from Twinline Motocycle, Daryl at MS&M machine shop, 1977mopeds, and Treats.