The Clearances for an 3.875" (88ci) piston are as follows from the manual:

Top Ring = 0.010" - 0.020"

Second ring = 0.014" - 0.024"

Oil Rings= 0.010" - 0.050"

Would a 3.875" (95ci) be OK with the high clearances of the above or would they need to be made bigger.

Cheers for any input in advance

Mal

hi,   i run about 18 to 24 on the top & 18 to 20 on the second ,  oil about 20 to 30 ,  thats for a higger than 9 - 9 .5 comp ratio  as the more C.Ratio the more heat  . the heat for expansion for the top ring is greater  than the 2nd ring  the oil ring is staggered  it can be up to 35 clearance , you don't want the top ring butting @ high temp,  the EVO barrells grow a lot more than  a twin cam as the evo's are weaker & taller,   cast iron  barrells are stronger & more stable &  don't grow like alluminum but need to be set up good  piston clearance etc & kept in tune  or the black death will kill the pistons & bore ,   i like big bore cast iron barrells  like axtell + can do modifications to keep the piston cooler but thats another story ,  on a high comp motor a bit of extra race  clearance isn't going the hurt anything