Sand the stock maxi high torque head of any type flat, because it will block the decomp hole that the Polini kit still puts in there for some ungodly reason,
Head sanded flat,
Throw the Stock single reed away (or mod it) run 2 stage or other reeds,
15 MM bing around 88-90 jet w 217 atomizer/needle jet, One clip or more rich on the needle with estoril or circuit pipe type pipe and you got over 7 hp down low,
No super expensive clutch, no pull start, no straight cut gears fancy needle bells fancy clutches, no HPI ignition, no nothing needed,
I can’t believe how many people spend $2000 on a e50 nowadays and mine are still running great from over a decade ago and go just as fast or almost just as fast with all these new aftermarket crap parts and I could take my bikes anywhere without exploding!