VRODE
Easy Does It
Whenever I deal with the rear wheel I miss my VFR. (4 log nuts....off)
What the f#$% did I do? Rear wheel install
- Thread starter BuellOnYamaha
- Start date
patrickg450
Well-Known Member
to me.......
It makes more sense to tighten the rear pinch bolt first, then torque the axel nut. This way there is the correct spacing/compression on teh rear wheel bearings. But Yamaha did not ask me.......
I follow the book, after I re-read it a few times.
It makes more sense to tighten the rear pinch bolt first, then torque the axel nut. This way there is the correct spacing/compression on teh rear wheel bearings. But Yamaha did not ask me.......
I follow the book, after I re-read it a few times.
WJBertrand
Ventura Highway
The correct spacing on the wheel bearings is controlled by the spacers and the shoulder of the axle being free to fully compress the stack of spacers and bearing inner races solidly together at the correct pressure. The pinch bolt MUST be loose to accomplish this correctly. If the pinch bolt is tightened first, some of the measured torque is actually bending the right swing arm inward and not being applied to the axle/spacer/bearing inner race stack. Only tighten the pinch bolt after fully torquing the axle.
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The rationale for loading the front is to align the lower fork tubes. There is a good chance to bind the fork tubes by tightening the axle prior to this step.
patrickg450
Well-Known Member
I doubt that the 90lbs of torque will flex the swing arm. I followed the book but there is still some room after alll the assembly is together. On dirt bikes the torquing of the axel nut applies pressure to the bearings. If the pinch bolt is loose then how does the torqing apply pressure?
WJBertrand
Ventura Highway
Oh yes it will! If you tighten the pinch bolt before the axle is completely seated, it’ll pull the right swing arm inward. There are reports on this forum of it happening. In these cases folks have observed the swing arm popping outward when loosening the pinch bolt first.
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patrickg450
Well-Known Member
I take back my previous statement.......
Could not sleep and did the assembly incorrectly, yes it did as mentioned above. I went to loosen the pinch bolt and the side moved out, you are correct. I can go to sleep now.
I did not see that being the case. I am wrong.
Could not sleep and did the assembly incorrectly, yes it did as mentioned above. I went to loosen the pinch bolt and the side moved out, you are correct. I can go to sleep now.
I did not see that being the case. I am wrong.
gunslinger_006
Well-Known Member
I would like to applaud this excellent use of the scientific method. Seriously.
patrickg450
Well-Known Member
It was bugging me, OCD I guess. When I read the post in my head I just could not see the the swing arm "flexing". I guess because the shaft on the left side would make it to "stiff to flex". Just never thought about the right side moving inword. Re-read the post, it was specific but I still missed it.
Live and learn
Live and learn
You're not completely wrong... just torque the rear axle in stages. After I verify that the spacer is located correctly and the ABS hub is indexed, I tighten the pinch bolts and do an initial torque of 50lb/ft. Loosen the pinch bolts to allow the axle to realign, tighten them down and torque to 75lb/ft. Loosen again just to be sure axle is in position then final torque the axle nut. Service nazis will say you need the pinch bolts loose and to apply counter torque with an allen wrench opposite the axle nut but I find this step to be unnecessary and awkward to perform.