Suspension query

Aprilia Forum

Help Support Aprilia Forum:

This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.
Joined
Sep 11, 2008
Messages
2,337
Location
Shoeburyness, Essex
When breaking reasonably hard (mainly front brakes) the back end tends squirm around , that it moves from side to side (not alot but enough to make you pay attention). I think that means its to soft and needs stiffening slightly , can anyone confirm this ?
 
Yup. You'll need to adjust the rear suspension as well.

And I imagine you're not only braking hard, but also compression braking as well. Then hell yes. Get your front and rear suspension adjusted asap.

When you get your susp. adjusted, be sure to have whatever gear you usually ride with, on. People usually, and for some reason, mainly worry about the front suspension, when indeed the rear is just as important.
 
Last edited:
i'm sure someone will correct me, but as far as i am aware, having the rear moving around like that is caused by the bikes weight being transfered to the front under braking. this, of course is meant to happen, it's the principle behind progressive braking. But if it is happening under average strength braking i would suggest that the problem lies with your set up on the front, maybe not enough pre load and probably not enough compression damping. whenever you are braking using the front brake there will be weight transfer, if you add in another factor (changing down a couple of gears for example and letting out the clutch without the throttle position incorrect for the selected gear and speed) then you will get a loss of grip leading to squirming of the rear tyre in the manner you describe.
what settings do you have at the moment?
hope this helps a bit
 
Not sure what settings its on as it has Ohlins front and rear but the rear shock has a remote preload adjuster.
Dont want to start winding things in and out without somesort of reference.
 
Not sure what settings its on as it has Ohlins front and rear but the rear shock has a remote preload adjuster.
Dont want to start winding things in and out without somesort of reference.

Do me a favor, take a picture of your set up and post up. Also, what year is your bike?
 
Thanks Kiwi. What do you weigh? What tires/pressures are you running? And what do you suspect your weight is with all the gear that you have on when you usually ride? I'd suspect you'd need to adjust the front and rear suspension. You'll experience much less (if any) chatter on the rear if it's set up correctly.

Go ahead and throw a zip tie on one of the front forks and go for a spirited ride. Check the position of the zip tie and see if you're bottoming out. I'd bet you are.

You can see the zip tie on my bike here in this picture:
picture.php


ziptie-1.jpg
 
Last edited:
I'm a super light 17 stone (238 pounds)!!............err um thats bloody heavy according to the Mrs !!
I ride in textiles this time of year , not too sure maybe another 20 lbs ?
I run 36 front & 38 rear (psi)

I shall put a zip tie on as soon as it stops raining and once daylight returns !! :)
 
I'm a super light 17 stone (238 pounds)!!............err um thats bloody heavy according to the Mrs !!
I ride in textiles this time of year , not too sure maybe another 20 lbs ?
I run 36 front & 38 rear (psi)

I shall put a zip tie on as soon as it stops raining and once daylight returns !! :)

Yeah, you and I weigh about the same. I'm sure you're bottoming out. Also, take some of the pressure on the rear out. I'd stick with 34 on the front, and 35 on the rear. Mayyyybe 36. But I feel 38 is a little too high for my taste. I believe that in itself will contribute to your rear chatter.
 

New Posts

Back
Top