Toc sound on hard front braking? - Ducati.ms

joeracing1 · Jun 15th, 2010, 7:46 pm

Hi, hope I will be able to get some advice.
When I'm doing hard front braking at the end of the braking when the suspension collaps I hear a toc that I can also feel in the handle bar. It only happen on hard braking...

I checked:
-the caliper are well torqued
-I tried to check the steering head base and I cant feel any loose but my method was questionnable since I don't have anything to hold the bike in the air. I putted a floor jack under the motor to lift the front end...

I can't see anything that could do that?

dragoontwo · Jun 15th, 2010, 8:26 pm

how hard are you braking when it happens? You may be bottoming the fork.

joeracing1 · Jun 15th, 2010, 8:36 pm

I have putted a piece of tape on the lower portion of the fork to see if I was hitting it when braking and it was not the case. I'm maybe 1 to 1.5 inch before the end. If I would bottom out the upper section would go strait to the end of the lower section of the fork? I guess also there is some kind of a bumper on this to prevent metal to metal contact when you bottom out?

dragoontwo · Jun 15th, 2010, 8:52 pm

IIRC, there's more fork leg than travel. I've bottomed out the forks under quick heavy braking as well.

Decreasing Dave · Jun 15th, 2010, 10:15 pm

Quote:

Originally Posted by joeracing1

I have putted a piece of tape on the lower portion of the fork to see if I was hitting it when braking and it was not the case. I'm maybe 1 to 1.5 inch before the end. If I would bottom out the upper section would go strait to the end of the lower section of the fork? I guess also there is some kind of a bumper on this to prevent metal to metal contact when you bottom out?

You're bottoming out the fork.

Adjust your compression dampening to compensate (turn it in).

Dave

Antigrav · Jun 16th, 2010, 12:17 am

check your axel bolt and pinch bolts.

doon · Jun 16th, 2010, 12:31 am

Quote:

Originally Posted by joeracing1

I have putted a piece of tape on the lower portion of the fork to see if I was hitting it when braking and it was not the case. I'm maybe 1 to 1.5 inch before the end. If I would bottom out the upper section would go strait to the end of the lower section of the fork? I guess also there is some kind of a bumper on this to prevent metal to metal contact when you bottom out?

Use a tyerap(cable tie) or you may fark the seal

joeracing1 · Jun 16th, 2010, 6:47 pm

I used a tyerap to obtain the exact measure and it's 1.050''. I tried to turn in my adjustment but still bottom (if it's what causing my issue)when doing nose wheelie, is it normal? I had a DRZ400SM before, I know its not the same, and I never bottom out the fork doing this?

Rob H · Jun 16th, 2010, 6:51 pm

I know that sound... Heavier springs are en route as we speak.

joeracing1 · Jun 16th, 2010, 8:32 pm

What brand? Do you have a Part number? From where did you ordered them?

If it's my case I will have to do the same...

I'm going for a warranty end inspection to the dealer so I will show them the issue and if they confirm I will go for that...

It's strange cause it feel really like a metal to metal contact, I was thinking that there should have been so type of bottom out protection on this fork...