I built this a few years back( 8 years or so.) Was a complete engine swap and had to build the pipe. Not the whole pipe but sections of it others wise it would not fit or perform properly. Just thought I would share for the 2 stroke nerds! forums.everything2stroke.com/threads/29124-pics-of-nelsons-yamazuki
1992 JOG 70CC BBK CHINNY KIT FROM USMCDOC
V3 REEDS,19MM DELLORTO CARB,DOPPLER FULL CIRCLE CRANK,70 MAIN JET,STOCK ARIBOX,LV ZX-R PIPE, 1000 contra SPRINGS,1500 clutch springs,4.5G ROLLERS, STOCK CVT AND CLUTCH 53mph
1992 sleeper-92cc, polini intake,43.5 stuffer crank,24mm sudco carb,tecnigas next-r 100cc pipe,case work and matched cylinder,to be determined...