20w40

Helix · Post by **Helix** » Tue Jul 28, 2009 10:25 pm

Who still uses 20w40 in there bikes?

Buffalo-guy · Post by **Buffalo-guy** » Tue Jul 28, 2009 11:57 pm

Yamaha

Barry S. · Post by **Barry S.** » Wed Jul 29, 2009 4:35 am

Don't worry about it, use 2-stroke gear oil in the trans.

Post by **oldjapanesebikes** » Wed Jul 29, 2009 7:22 am

At the risk of starting another oil discussion

, I run 20W40 in the tranny of my GT550, and its also specified for my GS400. The factory service manual of the GT750 calls for 20W40 (page 12), but I've always run 20W50.

rbond · Post by **rbond** » Wed Jul 29, 2009 7:47 am

I ran 10w40 in my GS400C for years. I tried early on to use 20w50, but it started using oil at a very quick rate. Switched back to 10w40, hardly used any.... With an all roller crank, etc. a 'heavy' oil is not needed and actually is a hinderence. Unless you are racing a bike, I don't think a heavier oil is needed for the transmission either, since every component is designed to run in regular motor oil, not gear oil. (90w120, etc.)

Coyote · Post by **Coyote** » Wed Jul 29, 2009 7:57 am

I can't find 20W-40 anywhere. I am using 10W-40 in my GT550 tranny. I also use it in my GS1000 as the recommended 20W-40 is not available.

tz375 · Post by **tz375** » Wed Jul 29, 2009 9:01 am

I used Zero weight gear oil for a couple of seasons, but can't get it anymore, so now it's back to Honda two stroke transmission oil.

Post by **Suzsmokeyallan** » Wed Jul 29, 2009 10:04 am

Using an oil with a specific weight depends a lot on many things, one of these is where you live. A 10W-40 looks way to thin when its up to operating temperatures in places where the ambient temps are always above 90F.
Therefore i still use Castrol GTX 20W-50 in the Buffalo, which is the recommended grade of oil for that transmission.
Oh i can see the faces now,,, ANOTHER oil forum.

Suzukidave · Post by **Suzukidave** » Wed Jul 29, 2009 2:04 pm

Suzsmokeyallan wrote: Oh i can see the faces now,,, ANOTHER oil forum.

H2RICK · Post by **H2RICK** » Tue Aug 04, 2009 10:33 am

Don't worry about it, use 2-stroke gear oil in the trans.

I vote with Barry on this one. I've ALWAYS used gear oil in my stroker trannys.
my .02 worth...

rngdng · Post by **rngdng** » Tue Aug 04, 2009 6:53 pm

Gear oil....GL5-rated.

Lane