Scooterotica

can someone tell me what is the standard rod length and stroke for a pk / small frame and are the pk 125 the same. cheers simon.

'Rod length is 97 mm, stroke is 51mm. Early PK's will have a 19mm flywheel cone, and the ETS onwards have a 24/25 cones. Can't remember offhand if any of the intermediate models used 20/20 cones but measure your flywheel Boss to see what you need. Obviously the thicker the taper the stronger the crank.

Juan wrote:'Rod length is 97 mm, stroke is 51mm. Early PK's will have a 19mm flywheel cone, and the ETS onwards have a 24/25 cones. Can't remember offhand if any of the intermediate models used 20/20 cones but measure your flywheel Boss to see what you need. Obviously the thicker the taper the stronger the crank.

wont be needing a vespa crank, now whats the rod length and stroke for a j125 4speed and a parma135 kit ?

No idea about the j crank. I think all of the Parmakits, there's about 20 odd models, are based on a standard configuration crank.

j100/125 95mm long x 48mm stroke