I think your mistaken. The transmission gears sit in gear oil just like a manual trans on a car. It's only our clutchs that are sitting in the same motor oil as the engine.
Eddie V
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I think your mistaken. The transmission gears sit in gear oil just like a manual trans on a car. It's only our clutchs that are sitting in the same motor oil as the engine.
Eddie V
Hi Eddie V,
The GS family of motorcycle engines, and about 95% of all four cycle motorcycle engines for that matter, use the same shared oil supply for both the engine and the transmission. It's because of this shared oil supply, and the shear created by the gears in the transmission, that motorcycles benefit from a more robust oil additive package compared to a car.
W
waterman
Guest
Perhaps he's thinking of the gear oil for shafties.
But not all shafties use separate oil for their secondaries--650 just use plain oil for everything. Not sure about the 450 auto, it is kinda odd in its own way. Nothing like a good oil thread to stoke the fire
:clap:.
I stopped at Advance auto on the way home. No CI-4/CI-4+ diesel oils from the major players. 
but I picked up some Advance brand oils, ( 2) 5w30-sm spec and (1) 20w50-sl spec, on there grand opening special (max purchase 3) for the low, low price of $3.88 per gallon.
(warren unilube I.E. coastal?)
going back for some more tomorrow!
but I picked up some Advance brand oils, ( 2) 5w30-sm spec and (1) 20w50-sl spec, on there grand opening special (max purchase 3) for the low, low price of $3.88 per gallon.
(warren unilube I.E. coastal?)going back for some more tomorrow!
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charger71798
Guest
OK guys, my point is a diesel oil does not have a JASO MA/MA2 ISO-L-EMA2
SAE 80w90 API GL-1 rating. It is simply for a internal combustion engine-no clutch or transmission. I will say no more. Anyway your engine is so good does it really matter?
J
jabberjoe87
Guest
whats wrong with castrol 10w40? NOTHING!!!!
Which oils meet the JASO MA/MA-2 spec? I know Amsoil does but anyone else?
Keep in mind that in order for an oil to meet the spec, it needs to be tested for the spec. Testing costs a lot of $$, so oil manufacturers aren't going to spend the money testing unless it will help them increase sales and offset the cost. For example, diesel engine oil makers are not going to spend money testing their oil to some motorcycle specific test criteria since 99% of their oil is used in HD truck applications.
you mean like this I FEEL that synthetic is a waist of your money!!!!
It will only have an effect on your waist if you drink it.
Earl
G
Guest
Guest
The GS650G uses engine oil in the transmission, fed by the engine oil pump. But it's a strange transmission.
It used to be common with a lot of vehicles. My MGA used engine oil in the transmission also.
Earl
Perhaps he's thinking of the gear oil for shafties.
Yeah, that may be it. I know I have changed the gear oil in both my final drive and the trans. I do have a shaft drive gs1100.
I guess your saying the chain drives use the motor oil in the gears also. Wow. I didn't know that. Thanks.
Eddie V
C
charger71798
Guest
Nessism, I will say more. I first want to say that I use a lot of your suggestions in a lot of areas. The diesel oil does have a JASO DH-1 rating other motorcycle oils with the JASO MA and SAE 80w90 API GL-1 ratings should be: Bel-Ray EXS, Castrol GPS, Golden Spectro 4, Lucas H.P. Motorcycle, Maxima Maxum 4, Mobil 1 MX4T, Motul 300V Sport, Pennzoil Motorcycle, Royal Purple Max-cycle, TorcoT-4SR, Valvoline 4-Stroke
Sorry if this comes across like I'm trying to win an argument, that is not my intention.
I just checked the web sites for Bel-Ray, Castrol, Lucas, and Maxima and none of these oils are rated GL-1. I got tired of checking after that so not sure about the other oils. Does this mean these are bad oils? Of course not. Another thing, all of these oils are very expensive - $8/quart or more.
I'll take diesel engine oil for $12/gallon thank you. It has a heavy duty additive package designed to protect commercial trucks with engines that cost tens of thousands of dollars. No, these oils are not MA rated for motorcycle clutches. Doesn't mean they will cause clutch problems though, just that they were not tested.
C
charger71798
Guest
I hear ya loud & clear.
