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Discussion in 'Parallel Universe' started by apexal, Jul 12, 2019.
Thanks for the input
How has the seat worked out?
Anyone with the service manual have torque specs for the chain cover? (aka Footrest Plate/Footrest Front Left)
A buddy of mine always puts loud "Cans" on his snowmobiles... He got a sled for his girlfriend and put a can on it. Then was always complaining that she would not go fast enough to keep up with the group...
I told him that maybe it's so loud that she thinks she's going faster than she is so she goes slow. He put the stock exhaust back on and the next trip she was much faster.
Some people just have a thing in their head that if something is loud it's going fast.
200!!! I had to get out the breaker bar to get it loose so I'm not surprised it was that hard.
Take note there is a sequence!
I ordered Wunderlich tank protection bars from SD Moto on 4/20. They shipped on 4/23 and I received them in Washington State on May 3.
No issues here with delays.
I'm thinking seriously about the Dunlop Trailmax Mission.
There is loctite on the swingarm bolt...
Not on mine. My bolt was completely free of any thread locker.
The only bolt with thread locker was a T30 button head holding the plastic fairing on above this aluminum piece. the rest had nothing .
The manual says "Replace Bolt" (not that I ever do that for most bolts) but usually it says that because there is factory applied thread lock on the bolt.
Your'e right and I agree that is the norm. I feel 'replace' in this case is due to stretch that occurred when the assembly line exerted 200NM of force on it and maybe it stretched? I will be ordering a replacement and a 1/2" torque wrench that even goes to 200NM.,
In the car world BMW does use a lot of one-time use stretch bolts. I am assuming the same would apply here for bikes.
BMW also said to replace rear sprocket bolts on the 800 GS when replacing the sprocket... I never did but I lived to tell about it!
They are very German about things mechanical. It's up to us to apply that proper methodology or not.
The first time I took apart my triumph tbs engine to replace the starter gear I had to disassemble the whole engine and split the case. When I put it back together the bolts that connected the head to the crankcase were all bent and I was like ehhh whatever they’re going back in. at the time I had no idea what stretch bolts were... needless to say I had an oil leak and had to take it apart again. Put it back together with new bolts and Yamabond as a case gasket and it never leaked again. Yamabond is magic.
Anyway that’s how I learned about stretch bolts. I remember those were tightened to 150lbs then tightened 90 degrees more in a sequence. 8 total bolts. Learned a lot with that bike!
I might not buy new ones for a luggage mount, but anything brakes- or drivetrain- related you betcha.
A lot of modern engines use torque to yield fasteners for internal engine parts. I have a protractor from Snap on that mounts between a breaker bar and a socket to do the final 90* or whatever the specs call for. Some head gasket sets can be bought with the head bolts right in the box with the gaskets. I was turning wrenches for a living when all this stuff first came out.
Torque-to-yeild will typically have a base torque follwed by a specified number of degrees of tightening following. The base torque is usually fairly low and intended to simply ensure the fastener is fully seated. The final tightening is what applies the clamping force.
A bolt with just a torque spec alone is very unlikely to be torque-to-yeild as it is far too hard to predict the yield point with torque alone. As noted before, most of the replace after use reccomendations made by BMW is due to their love of encapsulated thread locker on the bolts. That is really nice for factory assembly work, but in the field a good applied thread lock works just fine and will allow reuse of fasteners.