Originally Posted by England-Kev
Piston + Barrel upgrade...
You guys who have done the upgrade to new Gilardoni Barrel sets, I wonder, did you feel the need to change the big end bearings at the same time? Also, is there any way of telling if your bike has already had the cylinders changed to Gilardoni?
If you still have the motor in the frame, you can check the rods for play and make a decision. If the bike has high miles, it might be worthwhile to pull it down and clean the sludge trap in the crank pin, but that takes more disassembly.
You can change the rod shells in situ. Kinda hard to check the pin for roundness tho.