Originally Posted by
Riketsu
Since when Ninja and GRP are different engines? I thought GRP was a re-branded Ninja engine.
If a GRP plug doesn't leak in a Novarossi underhead does that mean a Novarossi plug will not leak in a GRP underhead???
No, it doesnt mean like that. Nova plugs only fit on Nova engines. Most of the other plugs can also fit on Nova engines.