Thanks to Ron for the piston catalog info.
My math is a little fuzzy here and there...I said the stock 261 piston compression height is 2.062. My bad,that's 235 compression height,I just measured a NOS 261 piston as 2.030 which is close enough to the Silvolite catalog's 2.029. I haven't measured a 261 rod length,but Pat Smith lists it as 6.812.


70 Triumph 650 cc ECTA current record holder