Originally Posted by
pa_sjo
JE rate them at 9:1 on a 47cc head with a OE head gasket..
The yank rods and pistons have a 19.00 small end, not 20mm.. You could re-bush the eagle rods but it quickly becomes not the bargain you first thought.
The yanks use a 19.95mm pin, .787 in old english. Trying to fit the xe or let pistons is pointless though, as the compression height is all wrong for the rod length.