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Noy Q75
Roostin Away
Joined: 16 Nov 2007
Posts: 943
Location: Perth W.A.
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 Posted: Tue Mar 04, 2008 7:42 pm Post subject: what have i done wrong ?? |
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ok just a qiuck run down. i am having issues with my bike been very loose on the rear end when i go around corners its like the rear end wants to over take the front end.  hence=crash on weekend were the bike smacked straight into a tree  would it be any of the parts i have fitted or is it my riding style.
i have fitted on the bike (700 raptor)
yfz450 shocks
lonstar + 2 A arms
lone star + 4 rear axle
total width of bike is 1310mm wide
razr2 tyres front and back (could it be tyre pressue)
could it be any of these causing the issue??
any help please 
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Ozzy84
Moderator
Joined: 10 Apr 2006
Posts: 894
Location: Gold Coast QLD
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| Posted: Tue Mar 04, 2008 8:36 pm Post subject: |
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have you got a widend rear axle or a-arms etc??
used to get the same thing (nothing out of control) on mine with the wider rear axle with STD front... |
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bullet
The Day Starts With OZATV !
Joined: 09 Sep 2006
Posts: 1518
Location: Middleton SA
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| Posted: Tue Mar 04, 2008 8:44 pm Post subject: |
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It could be a combination of all the things youve done and a lot to do with just the set up and tuning.
Are the +2 arms you bought also +1 forward.
That will shift the centre of weight back and tends to create a pendulum effect with the proportionally heavier back end.
I know this is a problem when you fit +2 +1's to an 04/05 TRX450.
Have a talk to Quad Squad, Adam will ask you 20 questions and work it out in minutes.
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Can-Am X Team
Bullet #Y12. MrsB #Y18. |
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TasRaptor700
Big Bore, Stroked & Bling +
Joined: 05 Jul 2007
Posts: 499
Location: Tasmania
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| Posted: Tue Mar 04, 2008 8:48 pm Post subject: |
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My 700 was a real pig around corners and in rough stuff, had all the swingarm rebushed and axle bearings done and she was as tight as a nun's penny pouch again. Yours would be due by now too if you havn't already done so, standard is a pressed plastic bush that lasts for never,, 
Not saying that this is your problem but I found it to be mine, 2mm of freeplay at the front of the swingarm equals a lot more at the rear.
Goodluck with it and keep us posted..
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Andrew |
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4stroker
Joined: 15 Jan 2007
Posts: 1420
Location: North Queensland
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| Posted: Tue Mar 04, 2008 9:06 pm Post subject: |
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how much tyre pressure do u run?
take the spacers out of the axle and see if that helps
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2002 SE Banshee |
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Mrs_Gaitar
Roostin Away
Joined: 12 Feb 2006
Posts: 749
Location: WA
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| Posted: Wed Mar 05, 2008 12:26 am Post subject: |
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Woodridge at this time of year on that dry slippery white clay is going to be slippery no matter what........ if your not steering it like a sprint car, your ass end is gonna come around and face you the wrong way !
Quick remedy narrow the rear end slightly from the front width
Razr2's will be fairly slippery on that track while its dry.
Throttle control very important
The wider you go,the more slide you will get.... eg you will lose hook up in the corners.
Follow up on changing the swingarm bushings.
Gaitar#28
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yogie
Moderator
Joined: 14 Feb 2006
Posts: 3620
Location: The Otways
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| Posted: Wed Mar 05, 2008 6:17 am Post subject: |
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| 4stroker wrote: | how much tyre pressure do u run?
take the spacers out of the axle and see if that helps |
I'm with him on this one... or
Has it got a yamaha sticker on it ? put a KFX700 sticker on it, it will slow the bike down quite considerably, problem solved.
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2005 KFX700
With a few bells and whistles
and the twin yoshi's
American Star A-arms, tie rods
elka stickers
Shorty Shifter
I have a Waco
rossco gave me a flexx sticker 
honda thumb
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durablue stickers |
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PeteW
Moderator
Joined: 09 Feb 2006
Posts: 1877
Location: Doreen, Vic
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| Posted: Wed Mar 05, 2008 11:31 am Post subject: |
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what is your front end geometry ie castor and camber? could be to little castor and it will flick out to easily.
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4stroker
Joined: 15 Jan 2007
Posts: 1420
Location: North Queensland
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| Posted: Thu Mar 06, 2008 1:01 pm Post subject: |
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how does that work pete? (not being a smart ass!)
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2002 SE Banshee |
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Noy Q75
Roostin Away
Joined: 16 Nov 2007
Posts: 943
Location: Perth W.A.
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| Posted: Thu Mar 06, 2008 8:27 pm Post subject: |
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thanks for your help every one .. off the top of my head the tyre pressure is 3.5 psi fornt and back. the tyres are 6 ply
the front wheels are set at 3 deg castor ?
they are +2+1 A arms
i will take the rear axle in 2 inches each side and try that to.
the rear swing arm bush is good and tight bike only as 40 hours on it . bit stupid not having a greese point there !!!
thank you
_________________
Sponsors ,Cullys Yamaha,Pirtek Malaga
2x YFZ 450r "09" 2x 90 Raptor "09"2x 125Raptors "12"
N# 1 Aus Quad Nats Vets 2010
N# 1 at BSA-HD for 09,10,11
N# 2 W.A. State Clubman A 2010
N# 3 W.A. State Vets 2011
N# 1 W.A. State Vets 2012 |
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PeteW
Moderator
Joined: 09 Feb 2006
Posts: 1877
Location: Doreen, Vic
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| Posted: Thu Mar 06, 2008 10:42 pm Post subject: |
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| 4stroker wrote: | | how does that work pete? (not being a smart ass!) |
Caster is the amount of angle that the spindle has in relation to the vertical centerline of the wheel.If the upper ball joint is farther forward than the lower ball joint, it is said to have negative caster. If the upper ball joint is farther to the back than the lower ball joint, it is said to have positive caster. The greater the amount of positive caster, the more stable the ATV will be at high speed. The less positive caster it has, the easier it will steer and the quicker it will turn. As the spindle is laid back, the tire has to lay over more when the front tires are turned. This adds stability. If there is not much angle, the wheel will turn more easily, making it quicker and easier to turn.
around 5-6 degrees is reccomended for MX and general riding and 6-8 degrees for desert racing
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