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Discussion Starter · #1 ·
Here is the precise information:
Michelin rear tire 130/70/18 mounted on the front is cold inflated to 42psi.
It is mounted in factory recommended rotation.
No vibration whatsoever before tire change. (old tire had little tread in the middle however)
No bearing problems, low miles 25k.
Vibration is slight tingling felt minimally in grips, a little more in both hand levers, ONLY from 30 to 40 mph range.
It comes on consistently at 30 and lasts through out speed range to 40.
Below 30, perfect.
Above about 41 it smooths out to perfect.
Corners fine and stable pulling hard from 40 to 85 to ?? and very stable cruising.

I ignored this intentionally since mounting the tire to see if it would diminish within the first 1000 miles.
It is still there after 1000 miles.
I know some of you are using balancing weights on your michelins.

Is that what I should now do? Can I do it with the tire on the bike?
If so what procedure is recommended for this tire.
There are no handling problems and it is no big deal on the road but that constant humm in the grips is annoying in town where we stay between 30 and 40 alot. I think I am going to deflate the tire just a bit to observe if there is a change. I am concerned about premature tire wear if I don't fix it.What to do?:? Thanks a bunch all:waving:
 

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I have the same tire, though monted reverse direction, and do not have a hint of vibration. I run mine right around 40. I have standard weights balancing mine. maybe jack up the front end a bit and double check the condition of your steering head bearings? You might also check the rear tire as a slight vibration transferred to the frame might be felt at the grips.
Probably not much help, but hope all works out well.
 

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Get the front wheel off the ground and spin the tire. Watch for the tire to wobble side to side, and run up and down like out of round.

Can help to sit a chunk of 2x4 close to tire where it barely touches then watch for the tire to hit it or get an air gap if tire moves side to side. Also place it in front of tire and see if it hits or get a gap.

My first Pilot Activ was badly out of round and wobbled side to side, we decided it was a busted or twisted belt and I got a free replacement.
As I recall it acted allot like yours it sounds like.
At city type speeds it was like riding a pogo stick LOL
 

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I too have my Active rear, reversed rotation, 42 psi, standard weight balance, with no vibration.

You didn't say how you balanced it or if you are using beads or?

As Chromo said, it could be out of round.
Or it could be in the rear tire, is it cupped? What is on the rear, how is it balanced, how many miles on it,?

Steering bearings need to be repacked and torqued properly too.
 

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Discussion Starter · #5 ·
narrowing it down........

rear tire is 500 miles new Dun E3 and ran perfect with old front tire. steering bearings test perfect! was perfect before tire change! problem is definitely in tire! no balance or beads yet but dyna beads on the way. I post, observe, then slowly do the next............by posting in advance I allow you seniors guidance before I screw up:) Now before adding beads I will do the 'out of round test' and promptly get it replaced if it is defective. Chromo did you send the tire back first or run it until the new one arrived? Thank you again wise ones:bow:
 

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rear tire is 500 miles new Dun E3 and ran perfect with old front tire. steering bearings test perfect! was perfect before tire change! problem is definitely in tire! no balance or beads yet but dyna beads on the way. I post, observe, then slowly do the next............by posting in advance I allow you seniors guidance before I screw up:) Now before adding beads I will do the 'out of round test' and promptly get it replaced if it is defective. Chromo did you send the tire back first or run it until the new one arrived? Thank you again wise ones:bow:
Do check the tire but most likely it's just out of balance.
 
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