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Old April 12th, 2009, 02:29 AM   #1
Beardiedrg
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Default front end washes out or unstable on some dirt conditions

I have a 98 Honda 650xl dualsport and while riding it on hard pack it has a strange behaivor, it seems to be front heavy and wanders or washes out, it seems to follow every little part of the road and feels unsafe at times, under throttle it seems better. new tire dunlop knobbies, and lower the air down to 20 psi, I'm not sure where to start, it has complete suspension adjustments, any ideas
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Old April 12th, 2009, 06:33 AM   #2
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I tend to wonder if your valving is blown in the front shocks. its about the only thing that would make it fell like a bad push in corners. also put it up on blocks to get the wheels up and see if your head set is free. if the bearings are toast it will give a simular feel
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Old April 13th, 2009, 02:07 AM   #3
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it's going straight it feels weird going down a dirt road and uneven surfaces the front feels all over the place, should I go harder in dampning in the forks or less, would a stiff rear setup cause it also. I understand it's not a true dirtbike, but don't remember this on any other bike I've rode the bike is like new, not much use and no abuse. mostly commuting miles from past owner.
The bike rides fine at highway speeds on pavement no vibrations or anything I can see would contribute to it in the dirt,
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Old April 13th, 2009, 02:50 AM   #4
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it will do that if the suspension isnt set up correctly. is it valved for your weight?
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Old April 13th, 2009, 03:24 AM   #5
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Quote:
Originally Posted by boggin-machine View Post
it will do that if the suspension isnt set up correctly. is it valved for your weight?
I just bought it, the manual just shows the settings not really about what to do for different circumstances. It does have adjustable dampening preload and air settings on the front and rear along with spring adjustment, just not sure if its the front or rear I should mess with. I asked the Honda dealer and They were huh.

and thanks for helping hopefully I'll get this figured out soon.

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Old April 13th, 2009, 04:49 AM   #6
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Some basic reading for you that should get you going.

http://www.thumpertalk.com/forum/sho...d.php?t=271134
http://www.thumpertalk.com/forum/sho...d.php?t=271120
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Old April 13th, 2009, 11:35 AM   #7
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Thanks ebs I think that will put light into it.
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Old April 13th, 2009, 11:49 AM   #8
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yeah it just sounds like youre a 100 lb rider on that 300 lb bike.
when i ride my friends 89 xr 600 it does the exact same thing to me.
just lean back and stay on the throttle or downsize a bike or quit complaining and just ride it out.
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Old April 14th, 2009, 06:55 PM   #9
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Where are the forks set in the triple clamps? Sounds like they're sitting up too high in the triple clamps. (or you have too much preload in the rear shock)
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Old April 14th, 2009, 07:49 PM   #10
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Try these guys. They do my suspension work and have done several bikes for my brother. They can head you in the right direction. Have been great to me.

www.tech-care.com
www.tech-care.com/PDF/SuspSetupGuide.pdf


Might find some answers here also

www.racetech.com
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Old April 14th, 2009, 08:00 PM   #11
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drop your forks about 1/8" in the triple clamps, what kind of dunlops did you buy? i hate dunlops, about the only thing i found their good for is selling them to ppl who dont know any better. another thing is your xr is so tall, and top heavy, its really hard to get a stable feel out of it in the dirt. lift your bike in the air on a lift, crate or something so theres no weight on the front forks, and take the bleeder skrew out and see if you have alot of air built up. alot of ppl dont realize you have to release the built up air in your forks, or you will have a pneumatic action, instead of dampening from your oil. they tend to bounce, and will take the weight off the tire, loosing traction. oh, and btw, where have you been, havent seen you at the park since last summer?
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Old April 15th, 2009, 01:22 AM   #12
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Hey losso,
Been some rough times lately, moved and moving again. I came out Sat late everyone leaving, I drove through the park on my bike and checked the spots, met Ron comming out of the gate and chatted. Been trying to keep everything together, sold lots of stuff and kareless stocked up 2 truckloads of great bargains, work seems to be tanking 70 layoffs so far all of our work newspapers are being sold, transfered or cut, so been saving and waiting for the layoff. The jeep is 100% and I haven't wheeled it in awhile, cause I work till 4:30 am all the local rides have already started. Being my only vehicle besides my bike, don't want to break shit. I like the trail rides and mud runs ask Mark Purplerhino about that, some hill climbs, hey know any middle aged women who like to jeep as in a copilot with me maybe. Probably going to the jeep blessing but am moving next month around the 15th again, gonna try to make the grand opening, I want the RAV windshied sticker and so I can proudly display it. You guys have busted ass and hope to play again soon. and thanks for the info I am gonna let the air out of the forks and the rear don't have much sag when I sit on it, so I am gonna work with it just got it and rode it 3 times. I'm old can't throw it around like when I was the kid
Later
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Old April 15th, 2009, 01:30 AM   #13
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Hey scooter,
I believe it's all stock setups, got some good info from jasper and EBS, in their liks thanks to all, just picked it up a month ago so been off dirtbikes for many years, dualsport that is. just don't ever remember having a front end want to find every irregular part of the road and get squarley on a straight, too much down pressure on the front maybe, air load and a very stiff ass end.
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Old April 15th, 2009, 09:22 AM   #14
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The best thing I ever did to my XR was buy a Summers Racing fork brace. Try lowering your air pressure in your front tire also to 12-14psi. Which Dunlop are you running?
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Old April 15th, 2009, 10:11 AM   #15
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Quote:
Originally Posted by curt1656 View Post
The best thing I ever did to my XR was buy a Summers Racing fork brace. Try lowering your air pressure in your front tire also to 12-14psi. Which Dunlop are you running?
I think summers is out of business.
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Old April 15th, 2009, 11:05 AM   #16
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http://www.rswracing.com/xr600r.htm Similiar and cheaper than the Summers one. I never realized how much of a difference it made until I rode a buds bike that had one, I bought one the next day.
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Old April 15th, 2009, 11:11 AM   #17
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Quote:
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http://www.rswracing.com/xr600r.htm Similiar and cheaper than the Summers one. I never realized how much of a difference it made until I rode a buds bike that had one, I bought one the next day.
I should have thought about that - as my XR250 had one and I bought one for my wife's old 150.

Good stuff.

Also, as Curt mentions - front tires make a big difference too.
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Old April 16th, 2009, 11:55 AM   #18
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I lowered the air pressure in both tires to about 18, bled the front forks, and lowered the front and rear rebound settings, adjusted the rear sag and took it for a ride. Both street and went down some good two tracks and what a difference, will adjust the rear a little bit more, but it seems to ride very well now. Oh the front forks are level with the top fork brace

Thanks for all the input
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