| Author | Message | ||
     Xb9er |
I posted this in the knowledge vault but no responses so I figured I would post it here.... I'm trying to dial in the suspension on my 1125R (stock suspension). When I go hot around a corner I can feel the rear end start to come out from under me. Its like the tire is breaking loose (I know its not doing a burn out), its like the rear end is not staying planted on the ground. My question is what adjustments do I need to make? Whats going on? I'm not educated on suspension so walking me through this is a 5 year old is a must and no one will get their feelings hurt. thanks-chris | ||
| Ogobracing |
The very first thing I would do is set up the suspension for your weight per the manual if that is not where you are at. My dealer did that when I picked mine up and I've not messed with it. For most of my riding it has seemed spot on. On very bad pavement, it is too stiff, but I think if I softened it for that, I would lose under normal circumstances. I've not been on the track with it yet, but it should work fine. | ||
| Xb9er |
It is set up to my weight | ||
| Rodrob |
Are you having the problem on entry, apex, or exit? (Message edited by rodrob on June 01, 2010) | ||
| Jdugger |
The tire probably isn't breaking loose, but the suspension is squatting under you giving that sensation. If the sag is set correctly for your weight, consider adding a quarter to half turn of compression damping and see of that helps. Also, what is your rear tire pressure set at, and what rear tire are you using? | ||
| Thunderbike |
You never indicated what model year your R is.I found that if it's an '08 set up your sag(frt.& rear).depending on your wieght.the preloads may be alot looser than the owners manual(ck.around the internet).This bike really responds to suspension adjustments.The '08 I had liked being really loose on preload with the comp. and rebound to the manual for wieght.Dito for my '09 but to a lesser degree.Then of coures this bike also likes a light touch when making inputs.Happy experimenting. | ||
| Xb9er |
Its a Dec. 07 build 08MY. It feels squrily from apex acceleration all the way through exit. I have PP2CT's and I'm running 34lbs in the rear and 36lbs in the front. Jdugger, are you saying I should stiffin the compression damping (rotating the teeth on the rear shock) to make it stiffer? | ||
| Gemini |
start by setting your sag as a starting point by measurment not by recomended factory specs. rule of thumb is about 30mm sag. now with that being said, from the reading i have been doing in "twist of wrist 1", you really need to understand if what you are experiencing is a fault of bad setup of bike or rider input/interpritation. i too have plans to hit the track, but i am not going to until i have read both of those books and begin to understand what is really "happening" when i look at a condition on one part of the track. just my 2 cents. | ||
| 99buellx1 |
The teeth is the preload. Compression is on the top of the shock. Reference the owners manual here: https://www.buell.com/om/99480-08Y_en/file-5.asp#h dtopic000111 | ||
| Rodrob |
Traction issues on exit under power are almost always rear setup problems. As Jdugger said, the rear end is squatting, indicating that your rear ride height is low with too little swing arm angle to induce the anti-squat that you want. You are also probably going wide on exit and feeling like you have to add lean to make the turn. As the rear end lowers, the rake and trail of the forks increase, making the bike want to straighten out and the steering feel vague. The rear and front must compress equally so that the overall geometry remains flat in the turn. Increase the rear preload until the bike feels stable and holds a consistent line after entry with gentle throttle. Then dial in more compression dampening to maintain exit stability on hard roll on exit throttle. In general, you want to get your entry feeling right first by working on the forks, and then the exit working right by working on the rear. But you have to start with the right geometry. If that's off, nothing will work. | ||
| Xb9er |
Okay thats everyone. Entry on the bike is great. The rear is what feels loose, though I am able to keep a good line with the bike. I just go along for the ride staying steady on the throttle. | ||
| Mountainstorm |
I am in agreement with Rodrob. I found a little extra preload in the back with a touch more compression made the bike do what I like and keep the rear end up as I accelerate out of the turn. | ||
| Thefleshrocket |
Xb9er, there are three things you can change on the shock--spring preload, and compression and rebound damping. What do you currently have your settings configured as? Preload: X setting Compression damping: X turns out from full stiff Rebound damping: X turns out from full stiff If you don't know what the damping settings are, simply turn each adjuster (gently) until it bottoms out, being sure to count how many clicks and/or turns you're going in. Then back the adjuster out to its previous settings. | ||
| Bear1125r |
when i got my 1125r i ask my dealer how it was set up. they said "it set up for 190" after ride it on the street for break in it was ok.but not good.so when i did my first track day,i check it out my self.lets just say all the parts were on the bike.i just set stock setting in the manual.and go from there.just going down my drive way it felt ten times better.on the track i use pirelli diablo rosso corsa 30 lbs front 32 lbs rear | ||
| Ratbuell |
Chris - shoot blublak a PM about this. He's done gawd knows how many track days and has had talks with Pirelli - turns out a lot of his exit problems were solved with a tire pressure change. That said...I run my CR about 1.5 weight ranges *lighter* than the manual says I should. Loki suspension bits are STIFF, at least for the way I like my bikes to ride and handle. All my other Buells, dead-on in the books. My CR, though, is race-car stiff when I set it "correctly" for my rider-in-gear weight. Go a range lighter, see if you like it. One change at a time, baby steps, on a road you know and can safely experiment on. Don't be afraid to adjust - the set screws are there for a reason  |
