| Listed in parts books | Not catalogued by year yet |
PISTON SET NORTON 99+.030
Piston set for the Norton Model 99 engine, +.030 oversize.
This is a piston set for the Norton Model 99, listed at +.030 oversize. It's a Norton part, not a Triumph part, so if you're wrenching on a pre-unit or unit Triumph twin this one isn't for your engine — this is for the Norton 99 twin specifically, and the .030 designation means it's meant for a cylinder bore that's already been machined out to that oversize spec, typically during a rebore to clean up wear or damage.
Read more
We don't have much more detail on this one in our records beyond the basic listing. If you're rebuilding a Norton 99 and need pistons at this oversize, give us a call and we can confirm the set will work with your bore before you order.
Sorry if we got something wrong here. If you think this information isn't correct, .