/o/ tourist here, assuming moped questions goto this thread.
Bought a 125cc chinese engine for my 50cc chinese moped. It came with technical instruction paper saying
>Lubricant: 15W40-SE
>Fuel: unleaded gasoline with RQ-93 or higher
What the hell does SE and RQ mean? I've been using the usual cheap semi synthetic bike oil as the engine has a wet clutch and it's been working fine.
Also:
>Valve gap: 0.05mm
That's from a hot engine, right? And isn't the exhaust valve gap supposed to be wider?