Getting ready to do a 107 in my RGC 103. Lots of good info out there but have heard some guys will bore stock cylinders and match pistons, where others like to start with new aftermarket cylinders and bore/match pistons from there. Any advantages? Does the heat cycles on the stock cylinders have any bearing?

 

You aren't far from Hillside. Scott bores the stock cylinders, you could call him or he might chime in.
I think centering the new bore and using the correct torque plates during boring makes all the difference, not necessarily the heat cycles.

 

They're "paper weights" if you don't reuse them ... Absolutely nothing wrong with boring them provided you use a reputable machinist ... Hillside is very much on top of this!

 

If you can reuse your cylinders, but all means do so. First, you'll save some money, and second your current cylinders have already gone through many heat cycles (seasoned) so they will tend to hold their shape better.

 

 

Thanks for the replys. Teardown has started!!!

 

no reason not to have your cylinders bored,we do tons of them for riders & other shops.just make sure their done by a good shop with the right equipment.centering on the 3.937 bore cylinders (98" or 107") is very important.scott (hillside) is up in your area,and will do a fine job

 

take pics and post. always enjoy following mods!