Do you still have that 83's? Yes I know the difference, but can be converted with paint job. It just reads 'Special' now but might add Midnight on side covers, I guess.

Turn the adjuster clock or anti clockwise to the chose setting you want, soft, medium and hard (the setting with the slot.) you also need to measure the air pressure in the shock. add air if the pressure is not up to 4.0 kg/cm (57psi). Since this rear shock absorber is old school tech and finding it damaged or air hose oil leaks replace the entire shock. (DO NOT DISASSEMBLE THE SHOCK ABSORBER IT CONTAINS NITROGEN) new after market shock absorbers are available if you need to replace it,

@@cyclonefish1463 hello Thank you very much for those explainations, it helps me a lot bro!

No. Mixing gasoline with oil only happens in 2 stroke bikes, not with this ?

Do not mix oil. Not with four stroke engine. Oil mix is done only on two stroke engine bikes for example RD350 and other two strokes of other brands beside Yamaha.

Where do you get parts for it??

Innerweb

I did managed from various sources online, UK (Starter motor), US , Australia (cmsnl.com) ,Taiwan (headlight), Hong Kong eBay(front fork tubes) and some small items from China. But now I am having issue purchasing carburetor diaphragm, though it's available I am having some payment gateway issues online. It's a last part that have stalled my ongoing project.

That's great to know, where you are from?

I am.

Sorry, I know.