What is the correct barrel and head combo?
On my '93 '21 SE, I have SP(L2) barrel with an R head on the rear(top) cylinder and an R(H2) barrel with an R head on front(bottom) cylinder.
Is that combo ok? Or should it be sp head with sp barrel and r head with r barrel.
I tend to jet both the same but for some reason I always get some pitting on the top of the piston on the rear cylinder. And when it seize up it's always the rear cylinder that's dinged up.I've never had any problems with the front cylinder.
The only mods on the bike is wire splice, 3 holes in airbox, and JHA over-rev chambers.