Danger at 100Km/h

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Danger at 100Km/h

Post  killabyte on Mon Sep 16, 2013 6:20 pm

Hi guys, im new to the XR650R, but soon i have found that more than 100Km/h in the tarmac  is really dangerous as the steering feels loose and sometimes with no control. Usually i have to slow down. It is even more pronounced when accelerating past 100Km/h, if i just keep a constant speed i can handle it. It really feels like the front wheel is not well supported on the road and it is very dangerous.

Is this a normal behavior of the bike? my recently purchased bike is in good shape, i believe no component is worn out or damaged. Do i need a damper stabilizer? Check front and rear geometry to correct something?

Best
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Re: Danger at 100Km/h

Post  SkidMark on Mon Sep 16, 2013 10:34 pm

A lot of folk will say you must fit a dampner but I have not had a problem at all.  I have had the bike loaded for three days away (ie weight on the back) and cruised at 100K's with no stability problems at all.

What tires are you running and at what pressures?

Regards
SkidMark


Last edited by SkidMark on Mon Sep 16, 2013 10:42 pm; edited 1 time in total (Reason for editing : opps)
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Re: Danger at 100Km/h

Post  killabyte on Mon Sep 16, 2013 11:03 pm

i thought people would say it is normal but now im worried. I have a dunlop rally in the rear and had a dual sport for a while in the front when i discovered the issue, yesterday i replaced the front with a knobbie and i feels the same scary thing when going fast. Im in a XR650R 2007. im just 135lb weight and tyres are at 30lb just because im in the tarmac right now.
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wobbling

Post  temporary kiwi on Tue Sep 17, 2013 6:56 am

sounds like you've got something seriously wrong, these bikes dont wobble on their own,if you are'nt mechanical, id advise you to take it to someone who is, this sounds like a combination off faults,the only simple thing to check is the rims/ tyres for out of round or side to side wobbly, after that id be giving it a complete check over from one end to the other

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Re: Danger at 100Km/h

Post  AURORA on Sat Sep 21, 2013 7:40 am

Are your wheels balanced?
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Re: Danger at 100Km/h

Post  Chris_w_65 on Fri Oct 04, 2013 6:37 am

Mine goes through a slight wobble at about 140km/h then pulls smoothly to 180
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Re: Danger at 100Km/h

Post  AURORA on Fri Oct 04, 2013 7:52 am

killabyte wrote:It really feels like the front wheel is not well supported on the road and it is very dangerous.

Is this a normal behavior of the bike?
Hello?
Earth to Killabyte are we reaching you?beat head 
Regardless of speed you always wheelie an XR650R.
The front wheel only touches the gound for consuption of alcohol, sleep or women.
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Re: Danger at 100Km/h

Post  AURORA on Fri Oct 04, 2013 2:28 pm

Getting back to your issue.
What do you mean by loose?

Is this a vibration, if it is a vibration, regardless does this happen only on a paved street, dirt road or both?

Your fork tubes. What is the distance from the top of the fork cap measuring down to the top of the triple clamp?
What is the sag distance of your rear suspension? Meaning when the difference when your off of the bike vs when your on the bike. Does it sag about 4 inches?
Are you running ultra heavy duty inner tubes in your tires?
Did you balance your wheel assemblies?
Is the front wheel straight and true?
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Re: Danger at 100Km/h

Post  babuja on Tue Oct 15, 2013 2:43 pm

Check Steering Stem Bearings.


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Re: Danger at 100Km/h

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