hmmmnz
27th March 2010, 11:27
well i have a curious wee encounter
the bike is a xr 200/250 (200 frame, and soon to be 250 engine)
i bought the engine as "going but smokes"
so i have stripped the top end,
the piston measures 73.87mm across it, (standard piston)
but the barrel measures 74.55mm
with a ring gap of about 2-3mm :sick:
hmmm
lol, the bore doesnt seem scored and i doubt that it would wear half a mm,
but who in there right mind would go to the hassle of a rebore to half a mm over size and still use the original piston???
so what say you savages??
a royal fuck up, or something else
should i go for the next rebore 74.75 and new piston and rings
or keep the bore the same and get 74.5mm piston and rings
the bike is a xr 200/250 (200 frame, and soon to be 250 engine)
i bought the engine as "going but smokes"
so i have stripped the top end,
the piston measures 73.87mm across it, (standard piston)
but the barrel measures 74.55mm
with a ring gap of about 2-3mm :sick:
hmmm
lol, the bore doesnt seem scored and i doubt that it would wear half a mm,
but who in there right mind would go to the hassle of a rebore to half a mm over size and still use the original piston???
so what say you savages??
a royal fuck up, or something else
should i go for the next rebore 74.75 and new piston and rings
or keep the bore the same and get 74.5mm piston and rings