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Discussion Starter · #1 ·
I have a hole that is worn through the back most part of the front fender on my bike. Its about an inch long and is at the apex of the tire where it might rub. That is my first concern.

Second is that under hard braking I notice a distinct sound that that is like a "whirring" that winds down as the bike slows down. Along with this, notice that the bike wanders a bit under the same hard braking effort. I lose the ability to effectively correct my line, even only when braking in a straight line.

My pads look good and the bike stops just fine. My tire size is 110/80/19.

Any ideas? :confused:
 

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When did you bend the forks?
 

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Discussion Starter · #5 ·

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Discussion Starter · #7 ·
Fender bolts tight?

Axle in tight?
As far as I can tell. I will check when I get home tonight. I know I haven't had the wheel off since I have owned it for the past month. The PO hasn't had it off except to have the front tire changed like 7K miles ago.
 

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That bike has been having this problem for a while if the tire has worn through the front fender just by rubbing under hard stops. I would be checking this out right now if it was my bike. There is something not right here. I just can't see your slightly oversized tire causing this. If the tire was big enough to cause rubs I think it would do it all the time, not just under hard breaking. As someone has already said, look at the axle bolts and the fender bolts, something is not as tight as it should be.
 

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I would check the wheel bearing as well. Get the front end off the ground push and pull side to side on the wheel. Spin it and make shire everything sound feels and looks good. As well as physically checking the tightness on axel bolts and fender mounts. I would not expert a bent or worn out fork bushings. The fender bolts to low on the fork to be bent from there to the axel. If it were I would think the fork would bind on compression. Most of the time forks get bent on the upper legs. This would not realign the fender. I would not ride it till I figured it out. Good luck and let us know what you find.
WC
 

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Discussion Starter · #11 ·
Ok, pics tonight. I have to ride it home. It has done this from the day I rode it home. It is pretty easy to see that the fender is mounted on the same portion of the fork as the wheel so it should all move together.
 

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:green_lol:

Maybe that jump down at the city dump at 130 MPH? :yikes:
Did you buy this bike new?

I bent my forks enough to pinch the fender between the tire and radiator and wore a hole in the back of the fender on the 30-mile ride home, that's why I asked.
 

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I have a hole that is worn through the back most part of the front fender on my bike. Its about an inch long and is at the apex of the tire where it might rub. That is my first concern.

Second is that under hard braking I notice a distinct sound that that is like a "whirring" that winds down as the bike slows down. Along with this, notice that the bike wanders a bit under the same hard braking effort. I lose the ability to effectively correct my line, even only when braking in a straight line.

My pads look good and the bike stops just fine. My tire size is 110/80/19.

Any ideas? :confused:
Crash Bars??? the tire and fender should not change position in relation to each other no matter how hard you brake, but you can drive aftermarket Crash bars into the fender... and in turn into the tire......

ask me how I know :)
 

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Discussion Starter · #14 ·
Crash Bars??? the tire and fender should not change position in relation to each other no matter how hard you brake, but you can drive aftermarket Crash bars into the fender... and in turn into the tire......

ask me how I know :)
Bingo!

I looked closely and noticed what was going on. My crash bars, can't remember the name, are hitting the fender and tire. I will get pics up tonight.
 

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Discussion Starter · #15 ·
Here are the pics.







Looking at it, I don't think there is any way to reverse the bar and NOT have it hit the engine head. So I think this is just a crappy design.
 

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Discussion Starter · #16 ·
And I was wrong. Hepco & Becker: 1. Previous Owner/PO's Mechanic: 0.

It does fit the other way rather well.

Now that issue is solved, next is to try and find the correct lower mounting bolt that the PO's Mechanic apparently lost during the engine rebuild. He replaced it with a coarse thread bolt. Idiots.
 

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He replaced it with a coarse thread bolt. Idiots.
Hey, at least you distracted us from our tedious daily lives with a brain teaser.

So when you brake, the forks flex rearward enough to pinch the fender between the tire and the bar?
 

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...So when you brake, the forks flex rearward enough to pinch the fender between the tire and the bar?
Looks more like the abrasion is on the outside of the fender.

Brake, suspension compresses, crash bar contacts fender.

Small chunk of fender, that is hanging, is likely contacting the tire or, in extreme braking, the fender may be shoved into the tire.
 

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Discussion Starter · #19 ·
Looks more like the abrasion is on the outside of the fender.

Brake, suspension compresses, crash bar contacts fender.

Small chunk of fender, that is hanging, is likely contacting the tire or, in extreme braking, the fender may be shoved into the tire.
You nailed it. The wheel does not move back towards the back of the bike (kind of) but the forks compress enough that the wheel travels up along the plane of the fork's rake.

In this case, if there is a stiff metal bar in the path of the wheel travel, wheel travel is limited by the object in the way. This caused binding and a dangerous condition under heavy braking where the front wheel is not just being slowed by the brakes but also the impingement.

:yikes:
 

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This caused binding and a dangerous condition under heavy braking where the front wheel is not just being slowed by the brakes but also the impingement.

:yikes:
Oh, c'mon, that's just a minor inconvenience.

Glad you made it so far without mishap.




BTW; JMP, JCM, JTM?
 
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