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Buell Forum » 1125R Superbike Board » Archives 001 » Archive through September 21, 2010 » Help with suspension tuning « Previous Next »

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Syntax
Posted on Wednesday, September 15, 2010 - 01:20 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

ok i am racing a 1125r here in New Mexico and it is great but i have one little problem the steering feels very heavy.i have to press very hard to lean in to the turn and i have to hold a lot of counter pressure on the bar to keep it from standing up in the corners. i have set sag both front and rear to 30MM, i am 120LBS full gear, the tires dont show signs of damping problems, and have dropped the forks 25MM to try to decrease trail to hopefully gain the lightness in steering but nothing has helped i dont want to drop the forks any more causing an upset rear end what else should i try? i am thinking of an attack triple clamp but that is $800 out the window if it does not work

racing
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Rpm4x4
Posted on Wednesday, September 15, 2010 - 01:50 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

i am 120LBS full gear WOW.

Have you tried a different tire brand? I could be way off but I know different tire manufactors have different profiles. I changed brands and before I had a hard time holding my line concentrating with both hands on the bars and now I can one hand the same corner.
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Dannybuell
Posted on Wednesday, September 15, 2010 - 02:15 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I am no racer, I have 95K mi on a heavily modified S1, penske, GPSuspension and my CR w 5500 miles re-valved/sprung.

start at original, put the forks back to where they were.

'i have one little problem the steering feels very heavy. i have to press very hard to lean in to the turn and....' If you are pushing down on the bar/pressing hard to lean in it sounds like you need to reduce the preload on the front. Assuming the stock (.98) front spring at zero preload and thats still happening you need to go to a lighter spring. Erik Buell Racing has .95 spring.

http://www.EBRacing.com/shop/page4.html
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Duggram
Posted on Wednesday, September 15, 2010 - 08:04 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Brandon, good to see you posting. I'll be at Sandia Saturday but not Sunday. I can't remember if the stock rear shock can lengthened, but that would help.
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Duggram
Posted on Wednesday, September 15, 2010 - 08:24 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

BTW my Torque Hammer will be for sale after this weekend. Please let me know if you are interested.

Thanks, Doug
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Jdugger
Posted on Wednesday, September 15, 2010 - 08:26 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Have you put a zip tie on the forks to see how much travel you are using?

I wonder, at your weight, if your are getting the front down at all...
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Pwillikers
Posted on Wednesday, September 15, 2010 - 09:28 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Do you have Pirellis on it? I bet you do. I had the exact same problem and I tried all manner of setup shenanigans to no avail. The only thing that worked, and it REALLY WORKED, was a change to Michelin Pilot Power 2ct tires for my track day use. Unbelievable change. Light effortless turn in and holds a line mid turn hands free. If you're racing, you'll probably want something more aggressive than the Pilot Powers, but I think the profile of any of the sport Michelins will fix it.
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Jdugger
Posted on Wednesday, September 15, 2010 - 09:35 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Looks to me like he's running slicks.

What are you using Brandon?
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Jonesgw
Posted on Wednesday, September 15, 2010 - 09:48 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Steering Dampener set to tight, if you have one? My steering is crap when I tighten the dampener to much as in can barely turn the thing.
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Duggram
Posted on Wednesday, September 15, 2010 - 09:49 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I rode with Brandon ~6 weeks ago and he had just put on Continental slicks. BTW I run Power Ones and can confirm what you say. I think Brandon might be a Conti dealer.
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Syntax
Posted on Wednesday, September 15, 2010 - 10:41 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

yep i am on contis and they have the close to the same profile as the michelin's my dampener is set so it still shakes just a bit off the bump. i have been thinking that i am not transferring to the front. if i take out preload wont that screw up my sag. i guess it is just a starting point.

@jdugger im glad to hear that you will be out this weekend and it will be good to have 3 buell's on the grid
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Syntax
Posted on Wednesday, September 15, 2010 - 10:46 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

@Duggram( not at jdugger) im glad to hear that you will be out this weekend and it will be good to have 3 buell's on the grid
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Jdugger
Posted on Wednesday, September 15, 2010 - 10:54 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Wish I could make it guys! : )

I'm racing CMRA on the 26th at Cresson. Come watch this back marker get his butt kicked!
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Dannybuell
Posted on Wednesday, September 15, 2010 - 10:55 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Syntax posted: "if i take out preload wont that screw up my sag. i guess it is just a starting point." Exactly.
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