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jono10
50cc nipper
Joined: 13 Jul 2010
Posts: 20
Location: vcitoria
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 Posted: Thu Dec 02, 2010 6:40 am Post subject: 660 bumb steer |
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| Would anyone be able to tell me if it is normal for a 660 raptor to wonder and bumb steer on a dirt road at a resonable speed.Do i have to adjust toe in or some thing? or is it just the nature of the beast ? |
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Sponsor
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TBR 927
Blaster class
Joined: 07 Jul 2010
Posts: 112
Location: Perth WA
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| Posted: Fri Dec 03, 2010 8:21 am Post subject: |
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If its standard front end you could be pointed in any direction ! With good rubber for heaps of traction keep control of that thumb throttle
Have you got a steering damnper ?? what size fronts you run ?? |
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bullet
The Day Starts With OZATV !
Joined: 09 Sep 2006
Posts: 1518
Location: Middleton SA
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| Posted: Fri Dec 03, 2010 8:53 am Post subject: |
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Try running about 4mm toe out.
Make sure your rear ride height is not too high (or the front too low).
This will have the effect of reducing castor by tilting the chassis forward.
There are lots of other things that will dramatically help reduce bump steer, wandering and improve drivability etc, but the above suggested are the zero cost set up things that you might want to check first.
_________________
Can-Am X Team
Bullet #Y12. MrsB #Y18. |
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SX Quad
4fiddy Racer
Joined: 25 Apr 2008
Posts: 203
Location: Kalgoorlie
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| Posted: Fri Dec 03, 2010 12:46 pm Post subject: If it has been widened? |
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Make sure front and back have both been width adjusted notyjust the rear and yes fit a stabiliser.
_________________
660R mine
300 Grizzly Hers
90R Little T |
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jono10
50cc nipper
Joined: 13 Jul 2010
Posts: 20
Location: vcitoria
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| Posted: Sun Dec 05, 2010 8:03 pm Post subject: |
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 Thanks guys that gives me a starting point. Oh and no damper as yet
Last edited by jono10 on Wed Dec 08, 2010 6:53 pm; edited 1 time in total |
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PeteW
Moderator
Joined: 09 Feb 2006
Posts: 1877
Location: Doreen, Vic
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| Posted: Sun Dec 05, 2010 10:02 pm Post subject: |
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the old 660's were not know for their stability to begin with, but then again most Yamaha sport quads run no more than 2 degrees positive castor which make them inherently twitchy. A steering damper will definitely help as will an adjustable front end. Being that there is not a lot of adjustability in theat model you could also try going for a bigger variation between front and rear tyres, 22inch fronts with 20 inch rears will make a big difference from the stock sizings of 21inch fronts
_________________
www.thumbpump.com
www.dirtcomp.com.au |
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