What engine do I have  By  miken (Read 1,872 times)

Here is the pic I think it is a 257cc the plate says 15w40 eng oil / I was told to use yp250 manual / in that manual the rear gear says 10w40 I drained it but it is way to thick. I think it is gear oil

That's what it is linhai.

JR

BN169mm is the designation for the Linhai/Yamaha 250/260/300 cc series of engines

www.partsforscooters.com/scooter-parts-diagrams/VOG-260-BN169MM-Engine-Parts

Check for the oil purg tube first before going too crazy. How many miles on the bike? A bike that needs a valve adjustment tends to drip oil since they close too early causing a build up of crankcase pressure from the blowby it causes.

put some cardboard under your ride when you park it.

also, is it actually leaking oil?

wiping the engine clean, then inspecting the next day will give you a good indication where the oil is coming from.
wiping my engine was pretty simple because i didn't have all that garbage under the seat.
you raised my seat and all you seen was engine.
as a matter of fact, that's all you had to do to work on my ride was raise the seat.
i removed everything else.
i didn't realize the storage compartment rim was the support for the seat, so i added my own support in the form of 2 lengths of swing set chain.
i even got it to where i didn't need to bolt the seat down, i didn't raise the seat, i removed it.

ah the joys of owning your own stuff, where warranties mean nothing.

my forte is the 244, but to my uneducated eye this appears to be the water pump.
i could be 100% wrong about that though.

my engine didn't leak oil either, but there was always oil on the bottom of the engine.
the stator wires always seemed to be oily.

my guess is you are getting blowby from the engine vent, maybe even a tiny amount from the stator wire seal.
unless you are adding oil between changes, i wouldn't worry about it.

like i said though, i don't know much about the 257.