solid cylinder, good quality, did it's job to podium variated class! I used it with polini speed cases, a 19 PHBG, and a simo calibratatatata. also kinetic cdi, polini var, malossi clutch and bell, stock 10.? to 1 gears
great low end, pulled hard to about 9000 rpm. i cut my own base gasket, used the included head gasket and everything sealed well.
this was all stock cyl and cases, no porting except opening the intake to match the 19 carb. maxed at about 390, held strong through two full weekends of racing and a bit of riding/testing in between. get it!
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warning wont work well on stock cases
July 13, 2015
taco eater :
moped man from portland , OR United States
this kit works well on polini cases the ports will suck air even with silicone on stock cases /to make stock cases work you must weld and bore them / not worth it / cost to weld and bore is more than buying polini cases / if you want reliability /buy there cases / don't be a retard / cause it will cost you a fortune / for a slow hard staring ped
won me gold at moped gp east '21 round 2 
warning wont work well on stock cases