Originally Posted by
1.9 xr2 on 40's
for reliablility i'd look to honda 125's too, cg xr etc, c90's are ok for the job but honda 4 stroke 125's are bomb proof
cbt and you are on the rd
c50,70 and 90 are four strokes too and have been around for a long time.The CG can burn valves out iirc,I think my mate has had four engines in his,and yes he does ride it like its an R1 cos he's a tit ! !
I have only blown one engine in a bogseat and maybe destroyed a gearbox.