Rear axle nut won't stay tight

[SpectraSVT]

Close...Club moto.

Took over to my buddy's house afterwards and he is going to JB Weld it on tuesday. Gonna use the good stuff not the weaker "instant" one. Its nice to know that it worked on yours too..good news for me!

Gonna order a Fastway case saver cause it comes with stainless steel bolts instead of the cheapo ones Yamaha puts on there. If it weren't for my do-it-all buddies I would be up a creek right now.

I'm gonna borrow a torq ratchet and see how far the nut will torq down. If it don't even come close to 60lbs then I'll replace everything and try again. I got it pretty tight today...slowly tightened it instead of doing quickly like I used to.

 

[darringer]

I have found the POR-15 to be better than JB weld. It is easier to use. After it is applied, use a wet finger to smooth out. After it got tacky, I painted it with aluminum paint. the paint becomes impregnated in the epoxy and will not come off. It was then invisible to everyone but me. The stuff hardens like ceramic. If you heat it while it's curing ( I use a 100-watt light blub ) it hardens in about an hour. If not, overnight. If I can, later I will take a picture of it and post.

 

[SpectraSVT]

thx...I'll look into that.

 

[darringer]

Here is the repaired case. Sorry it's so dirty. I just haven't gotten around to throwing it away yet.

 

[Studboy]

Excellent repair!

 

[SpectraSVT]

Woow that looks good actually! I got a hole in the same exact spot. Not very big but enuff to spill my gear oil all over the place. Not like anyone can see that spot anyways.

 

[darringer]

SpectraSVT, good luck with the repair. Let us know how it goes. The bike threw a chain, and there was no case saver on it at the time. Won't ride without one anymore!

 

[SpectraSVT]

Supposed to start working on tomorrow nite. But seeing how I didn't throw a chain and my case saver got ripped off, I am wondering how "saver" it actually is..

 

[SpectraSVT]

Well the repair is going great. Should finish everything tomorrow with the case. Still have to get the bolt out of the case so the new case saver can get bolted on properly.

I had been tightening my axle nut with a crescent wrench since I got the bike but I wanted to get the exact torq reading for where its popping loose so I could yell at Yamaha. Yamaha spec is 90 ft.lbs. Using a torq wrench and socket, instead of crescent, it torq'd down to 90 ft/lbs with no popping. SO I am stumped. It has to be something with the wrench thats causing the nut to pop cause 90ft/lbs is insane. With torq wrench the nut tightened just fine. Definitely confused and pissed, knowing that all this could have been avoided if I had bought a torq wrench.

 

[darringer]

Maybe the crescent wrench, since it only holds two sides of the nut, caused the nut to become oval-shaped as it was being tightened and slip. If this is the case, I would still replace the nut as I don't think I would trust it again. Is it possible to install a new nut first, and use the old one as a locknut against the new one? I have tightened my axle with both a torque wrench/socket(home) and a large crescent wrench(field) without ever having a problem. Man, talk about a weird, annoying problem. I never thought twice about something as SIMPLE as an axle and nut. Now I have to keep an eye on mine!

 

[able]

i think if you investigate this problem further you will find it is caused because the spacer in between the wheel bearings has been crushed

 

[able]

sometimes you can find a steel spacer out of an older model bike to replace the aluminium one commonly used these days

 

[SpectraSVT]

I will definitely check that...thx for the tip. Need to grease them anyways.

 

[kdxtaz]

Is the bearing spacer/sleeve inside the hub? Sounds like you could be shoving a bearing into the hub.

 

[SpectraSVT]

Maybe the crescent wrench, since it only holds two sides of the nut, caused the nut to become oval-shaped as it was being tightened and slip. If this is the case, I would still replace the nut as I don't think I would trust it again. Is it possible to install a new nut first, and use the old one as a locknut against the new one? I have tightened my axle with both a torque wrench/socket(home) and a large crescent wrench(field) without ever having a problem. Man, talk about a weird, annoying problem. I never thought twice about something as SIMPLE as an axle and nut. Now I have to keep an eye on mine!

Thx, after striking my thinking man pose all day, this made a lot of sense. I think this is the problem. The Yamaha nut isn't that big so I can see how this could happen under extreme pressure.

I'm still gonna check the bearings but the wheel spins freely without any hangups so I doubt I will find anything amiss.


THX EVERYONE!!! you have been a huge help! This site is awesome! :eek: :aj:

 

[SpectraSVT]

Fired up bike today and the case fix is holding. But my clutch is fried. Not too bad though.

 

[darringer]

It NEVER stops, does it! Glad to hear about the success on the case.