Need some help please, I Purchased FL250 with a new 4 stroke motor , unmounted. thats all there was, i took it as it was a project for my son and I.
Fitted a centrifugal clutch with 17T sprocket - to output shaft on 15HP motor. Motor is good for 4000 rpm, but thats it.
I then fitted 13T on input shaft of gearbox, the gearbox is a 9.5:1 reduction to the wheels.
Runs well at top end but struggles on take off; Burnt one set of springs already.
Obviously 13T sprocket too small, but without knowing the original ratio between the two pulleys i am only guessing.
could someone please help me out with diameter of both pulleys.
also did the original FL250 come out with variable speed drive??
many thanks