The bearing that failed is at the starter clutch end of the generator shaft.

I coming to the realization that Yamaha quality control took a vacation when they built my bike. The reason the bearing failed is that the spacer on the end of the shaft between the starter clutch washer and the bearing was installed backwards. I know this because the spacer is beveled on the interior on one side to mate up to the shaft, the other end butts up against the bearing. It was turned around, which caused excessive lateral force on the inner race of the bearing causing premature failure.

But the good new is parts will be in Wednesday and the inner race is removed from the shaft and the outer race is removed from the block. The outer race was tricky but I got it out.

Hopefully when I get her all back together I won't have any more problems. The engine rolls over real smooth and quiet by hand now so all should be good.

 

Jeez that's some lucky streak you are having and hopefully no damage resulting from it. I also hope this isn't an insight into the future of my bike after the dodgy valve incident! GL getting it back on the road.

 

Thanks. Got it back on the road yesterday. It sounds good and runs even better! I had pulled the oil pan to check for debris. It was a good thing I did. I pulled out the remains of the bearing cage and a few other unsightly bits. Got fresh oil and filter in now and will do a flush and another filter and new oil in 100 miles just to be safe.

Good to have Ol' Blue back on the road!

 

How did you get the stuck race out? This has just happened to mine, destroyed the stator and bearings and metal everywhere! I spent 4 hrs so far trying to get the race out but its not moving! Any advice???

 

Hey Sideways, just saw this post. I bought a pilot bearing puller from Harbor Freight, also called a blind bearing puller.

http://www.harborfreight.com/3-jaw-pilot-bearing-puller-4876.html

To get the outer race out of the block, I had to use a Dremel with a cutting wheel and cut a shoulder into the bearing face for the puller teeth to grab onto. Once I got it set up it came out fairly easily. I stuffed a rag into the cavity to keep small metal shavings and particles from getting into the sump, but ultimately had to drop the oil pan anyways because the ball bearing and some of the chewed up cage had dropped into the pan when I pulled the rotor out.

Take your time and you should be able to get it out just fine. Good luck!

 

Hey hooligan, so do you remember which way that spacer is supposed to be installed? I disassembled my stator for inspection and now I'm not sure if I installed it correctly. The manual doesn't cover that in detail.

 

http://www.r1-forum.com/forums/showthread.php?t=344980

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The tapered bit should face the generator.

Man, that was painfully but got it out. Cleaned the crap out the sump, changed the oil, started the bike and sounds good... rev the motor slightly and I hear a funny grind type noise from the stator cover... thinking I should have changed the other bearing too! Do you think the other bearing could be my problem? It looked good... I'm learning to hate this bike! Anyone with an r1, get this bearing and generator cover changed before it goes! I had magnets everywhere too!

 

Sideways I have the 05 R1 and the bearing behind the cover has came apart took forever to figure out where the metal was coming from. I am still trying to figure out how to get that bearing out. It is sandwich between the cover and another piece that the stator mounts too. I just don't want to damage anything trying to get it out.

 

I knocked the metal chunk bit out of the cover through the hole with the screw in. Tapped out quite easy, I may have used a little heat. To get the bearing out I used a vice, put 2 pieces of wood on one side either side of the hole and a stack of washers on the other sude to press bearing out. Tightened vice, applied heat with blow torch and closed vice, just took it steady and it popped out. To get new bearing in, did the same in reverse, just used one or two washers to push it in all the way. Don't forget to use heat and plenty of it, only way it would move! Hope this helps.

PS, don't heat the outer cover when putting the chunk with bearing in, in the outer cover.

 

I heated the metal chunk up for 5 minutes with a heat gun and it almost fell out all the way. I had to put the long screws in and laid a piece of wood across the 3 screws and one light hit and it popped out. I will take my press to get the trashed bearing out. I know the tricky part will be getting the metal chunk lined up with the 3 screws. I guess I will insert the long ones through and slightly thread them in. I will freeze the metal chunk for several hours before hand and heat the cover up with a heat gun hopefully it should line up and drop in correctly.:tocoo:

 

In my original posts, I did not mention that I also replaced the outer bearing in the cover as well. After I got the outer bearing out of the cover, I dremeled away a bit of the material to make installation of the new bearing easier. The plate held it in place fine after that and I did not have any issues with it after the fix. Just a FYI.

 

I know this is an old thread but does anyone know the part number for the inner bearing?

I can't find it on the fiche. What is it listed under on the fiche?

Thanks in advance!!!

 

Hi

Bearing part number 93306–20230

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this is a typical yamaha failure
i have a freaking collection of these covers, bearings and stators.
the rotor has failed on me 4 times.

 

Thanks yall!!!

 

did you replace the outer and the inner bearing?

 

Hey r1curt, sorry for the overdue response. If you're referring to my original post, the answer is yes, I replaced both inner and outer bearings.

 

I recently replaced my generator cover because it was damaged and started leaking. Before I took it apart, the bike ran fine and did not make any noise. I pulled the generator completely apart, lubed everything, and installed the new cover. I did not replace the inner or outer bearing. Today I tried to start the bike after it has sat for 2 months. When it fired up, I heard this loud whine, which seemed to come from the generator cover area. It sounded like the typical Yamaha whine but very loud and isolated. it got really loud as the bike ran and then the bike stalled as if the engine locked up... I can turn the engine over by hand until it gets to the compression stroke, which tells me it is not locked up. The starter will push it to it too then is stuck. However, for some reason the starter went out too. It took quite a while for me to start it. . The starter has died for some reason. Any idea on what went bad? All the bearings seem to be okay. It was dark, the bike only ran for a minute, and that cover was hot... Did yours do this too?

 

My bearing failed after repairing the head. I never had the cover off, it was a case of pure coincidence. But I saw your other post and can't help thinking when you had all the stuff apart that maybe you reinstalled the starter clutch backwards. The bearing in it is a one way bearing and freewheels when not being turned by the starter motor. If installed backwards, the engine can over speed the starter motor and burn it up.

 

Dude... That makes too much sense but it has to be a coincidence ..... As the bike ran, it ran like crap but then it started to clean up and idle normal that's when this sound of a whirling gear or a turbo became present. It sounded like the typical Yamaha whirl but amplified and I immediately started to trouble shoot the general area for what I was hearing as a bearing dying..I didn't mess with the bearing but as I was matching up I could help but think that as the engine turned the gear must be turning which would run the starter. That would suggest why it slowly stalled and why the starter was full of destroyed brushes and other junk... How did that happen? Now you got me doubting myself and I have the shop manual to-boot... SO, you're saying that there's a chance that I got this backwards and the engine was running the starter?

 

SO, you're saying that there's a chance that I got this backwards and the engine was running the starter?

Yes, there is a high probablility that is what happened. The starter clutch is geared to allow the relatively small starter motor to turn the crank to start the engine against compression forces. But if that starter clutch can not free wheel, the engine then spins the starter motor at a much higher ratio and of course destroys the starter motor.

 

I am also thinking that since I did not have the bearing carrier straight and the bearing itself fully pressed it that the gear could not freewheel because of the pressure from the rotor that it did spin the starter and cause that damage which may have bogged the engine down and killed it. Dude. Thanks for the thoughts.

 

I pulled everything apart and I didn't do that. I'm thinking that I pressed the bearing carrier and bearing in too shallow and when I installed that cover it forced the two gears together and wouldn't allow it to 'freewheel.' That is evident from the

 

.....the damage to the rotor... I can't upload it because the photo is too large...

 

Here's the starter...

 

Okay guys I'm having the same issue with an 07 well sort of the same issue my stator failed am I rotor failed put magnets all over my s*** I cleaned it all up now when I put it in it makes almost like a knocking noise and it's not coming from the motor it's coming from the stator case itself has anyone ever experienced this maybe I installed the bearings backwards or not flush I don't know I've done this and rebuilt this thing probably 30 times I cannot figure it out please any information will help me I have replaced the stator rotor and bearings thank you

 

I HAVE !!LOL...I replaced the cover plate, journal, bearing and every spacer and bearing to include to rotor...SO, Everything in that area is super tight so if you damaged ANY machined surface you're going to have to replace it. The bearing journal in the cover plate along with the bearing might be the culprit. BOTH NEED to be pressed in with a hydraulic press once you replace BOTH. The old socket and hammer isn't going to do it...The bearing in the crank area usually doesn't go bad because it's drenched in oil. . Put you hand in there and slowly spin it and if you feel ANY resistance( bumps, notable increased resistance to turn) it's bad too. I had replaced EVERYTHING in the parts breakdown from that area and WALLA! It's GTG.

 

There is a bearing in the starter gear that is directional and it is very easy to install backwards. That may be your issue. But if the knock continues, it could very well be you have crank shaft bearing or journal damage.