Cam journal and cam FUBAR

[GSX1000E]

Chuck, could you just cut the center section of that guard and peel them up to form wings that might direct the slinging oil towards the cam ends?
Sort of out with a downward angle?

[rustybronco]

#13 is the oil feed tube to the head?

http://www.partsoutlaw.com/oemparts/a/yam/5004175ff8700209bc784b68/oil-cleaner

[chuck hahn]

Yes Dale..thats the oil feed tube.

[rustybronco]

GregT, machining for a needle bearing sounds like a good idea if you can drill it for an oil passage then deburring the hole so it doesn't bugger up the rollers.

Chuck, 'can' you update to the later style balancer, or have you already if it's possible?

What oil did you finally go with when you first re-built the motor?

[chuck hahn]

I didnt mess with the cams the last time Dale as they didnt show any signs of wear. The oil was Honda 50/50 synthetic blend HP4. This is what Randy suggested as you may recall from the earlier project.

I wasnt aware of any upgraded balancers from all that I have been able to find and read regarding the oil issue. An article in Motorcycle Classics ( I think it was ) detailed the issue of the oil being whipped to a froth and the fix back then was the added 2 inch "spacer" that made the sump deeper and thus required more oil in the tank as well.

Randy said the Honda oil had anti foaming agents and would be a great oil for the machine. In any case just because I didnt see anything in particular the last time doesnt mean these blocks and cam werent already on the way out.

[rustybronco]

If you look at the parts list for that bike they list an early and a late balancer.

Try a full synthetic oil in it this time. Amsoil 20W50 possibly?

[rustybronco]

Deeper sump...

http://www.yamahapartshouse.com/oemparts/a/yam/5004175ff8700209bc784b68/oil-cleaner

Crank balancer old type.

http://www.yamahapartshouse.com/oemparts/a/yam/5004175df8700209bc784b61/crank-balancer-old-type

Crank balancer new type.

http://www.yamahapartshouse.com/oemparts/a/yam/5004175df8700209bc784b62/crank-balancer-new-type

Looks like #12 has been changed.

[chuck hahn]

Dale ...heres the article I had mentioned on the phone today. Its quotes the problems found and in one paragraph it states that several oil engineers stated that had the oil technology of today existed back in 73, then there probably would have ever been a recall.

No that statement in itself makes me wonder just what is the very very best racing oil in existence today that has the most superior anti foaming properties. If theres a super great anti foaming race oil I would like to know what it is and run that. And this article was written by the man directly involved in the recalls and the fixes implemented far as I recall.

http://www.classicyams.com/4-stroke/4-stroke/yamaha-tx750-story.html

[chuck hahn]

What I am looking for and cant find anything on Ebay is part 31 here..and of course the longer bolts. That spacer and the good oil should resolve everything.

http://www.partsoutlaw.com/oemparts/a/yam/50041756f8700209bc784b40/crankcase

[chuck hahn]

Put 10 miles on the bike today. Running Lucas motorcycle racing oil in it right now. Took tank cap off and it didnt have any foam in it when I got back.