how did you check the rim and rotors for straightness? are you feeling this vibration under braking or just while moving. is it all the time or sometimes?

 

so it happens at speeds of over 100 mph all the time and thats whether i brake or not. Braking only helps the vibrations because the bike slows down. furthermore i spun the rim on the axle to see if it was wavy or not. it didnt seem wavy at all.

 

have you checked the head bearings?(where your triple trees mount to the frame)?

 

Check the front rim for a wheel weight. If its not there then that could be the problem.


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Without a run out gauge you can't determine straightness.

It's a pain, but consider loosing the forks in the tripples and re-tightening. May have to remove fairings for that. May be unneccesary if you know the bike has never been crashed (forks have never taken force from an odd angle).

Do the front axle setting technique as described in the Honda shop manual (leave left fork boot pinch bolts undone while you pump the brakes and set the axle to prevent binding)

Inspect all the brake disc carriers for deflection/damage.

Torque caliper bolts to spec after the main axle bolt, not before.

Check front wheel spacers for damage or excessive wear.

All I can think of for now.

 

Did you balance the front wheel?


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:+1:

First check for me would be wheel balancing.

One of the easiest and cheapest to fix too.

 

Havent checked the steering bearing or the wheel bearing, how would i be able to tell if its bad? Also there are no weights on the front rim anywhere. maybe thats the issue. I will check these things, thanks for the wealth of information guys!

 

Take your front fender off and put a zip tie around your fork tube and direct the end you usually cut off at the rotor. Then cut the end of the zip tie off so its a c*nt hair away from the rotor. Then spin your wheel and watch the rotor againts the zip tie. See if its gets any closer or further away as you spin the wheel


Edit: Im assuming you have a front stand.

 

no weights get it balanced, if its fine under 100, its probably just out of balance and you can really feel that at high speeds,

no weights?? is there glue where they used to be?

 

When you did the brakes did you happen to have the wheel off at any time?

 

Wow all great tips!! i will try the zip tie idea, i never thought of that. i have a friend who has a front stand i can use, or i can just winch it up in the air. also when i changed the front brakes i did take the front wheel completely off. I didnt notice any glue on the rim where there could have been wheel weights though.

 

step by step how did you install and tighten up the wheel?

 

Get your wheel balanced first and see how you go.

 

Aside from the already suggested (and most likely) fixes, the wrong size front tire causes some vibration at higher speeds. 120/60 as compared to the stock 120/70. You already got some great info here, just thought I'd throw this out there.... just in case you recently got a new tire and there was some kind of mix-up..