07-08-17, 08:30 PM
Yamaha specifies (in the 2005 owner's manual) API service SE, SF, SG type or higher. When you check the API website, it says that all these specs are obsolete. It also cautions that SG may not be suitable for petrol engines built after 1993. The other two are not suitable for motors built after 1979 and 1988. WTF?
What VNA said about the JASO MA1 & MA2 specs is true. JASO are the only organisation that actually test oils for clutch slippage in motorcycles. If you're really concerned about this possibility, it follows that you should only buy a JASO MA1/2 approved oil. But a lot of the bike-specific oils on sale in the UK haven't been tested by JASO, so where does that leave us?
The answer is it leaves us in a minefield. As I've said already, if you aren't sure then play safe and get something with a picture of a bike on the can. It's the sensible thing to do. But there are better oils out there and cheaper ones, too. If you feel inclined to work out which is which, you can save a few quid and put a higher quality oil into your motor.
Right, tyres ... round and black works for me.
What VNA said about the JASO MA1 & MA2 specs is true. JASO are the only organisation that actually test oils for clutch slippage in motorcycles. If you're really concerned about this possibility, it follows that you should only buy a JASO MA1/2 approved oil. But a lot of the bike-specific oils on sale in the UK haven't been tested by JASO, so where does that leave us?
The answer is it leaves us in a minefield. As I've said already, if you aren't sure then play safe and get something with a picture of a bike on the can. It's the sensible thing to do. But there are better oils out there and cheaper ones, too. If you feel inclined to work out which is which, you can save a few quid and put a higher quality oil into your motor.
Right, tyres ... round and black works for me.