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bowser
4fiddy Racer
Joined: 28 Oct 2008
Posts: 208
Location: newcastle
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 Posted: Sun May 17, 2009 7:26 pm Post subject: want to go wider, how? |
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bike is far too tippy for mx and i want to go a couple of inches wider.
Don't want A-arms due to cost
First up, is it better to have front slightly narrower than the rear or even?
What is a good width increase?
What is better for front, those longer stud things or billet spacers?
What is better for rear, G-force offset hubs, longer stud things or billet spacers?
thanks
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08 Raptor 700SE
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BARN-6
Roostin Away
Joined: 12 May 2006
Posts: 684
Location: Upside down in the tyre wall
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| Posted: Mon May 18, 2009 6:22 pm Post subject: |
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| IF YOU WANT TO SAVE MONEY JUST GO +1 SPACER STUD MAKE BIKE 2 INCHS WIDER |
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The Two Stroke Smoker
Roostin Away
Joined: 03 Jul 2007
Posts: 541
Location: mid pack
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| Posted: Mon May 18, 2009 7:51 pm Post subject: yeah |
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Barns right spacers are the quickest and most cost effective way to got your bike wider. +1 spacers for the front and +1 hubs for the rear.
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Haggis
4fiddy Racer
Joined: 22 Apr 2007
Posts: 285
Location: Lucindale SA
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| Posted: Mon May 18, 2009 8:41 pm Post subject: |
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Im not 100% sure but i thought it was better to be wider at front than rear. If you think when you corner the weight will go to the outside front tyre ( pivot point ) if you make the rear wider you have more leverage to make it tip. So by making the front wider it will be more stable,( pivot point further out ) taking more effort to tip. Hope you get what im trying to say!
Thats if you were only going to widen one end , id agree and go spacers both ends |
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bowser
4fiddy Racer
Joined: 28 Oct 2008
Posts: 208
Location: newcastle
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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 May 19, 2009 10:16 am Post subject: |
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I think you've answered your own question in relation to widening your quad Bowser?
"Cheap, Fast, Reliable.... Pick any 2."
My opinion on 'wider front or rear'?
Wider front.
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Bullet #Y12. MrsB #Y18. |
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phrozin
Blaster class
Joined: 15 Jan 2008
Posts: 111
Location: earth
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PeteW
Moderator
Joined: 09 Feb 2006
Posts: 1877
Location: Doreen, Vic
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| Posted: Wed May 20, 2009 10:48 pm Post subject: |
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think about how the spacers will effect your quad before you go down that path, 1stly it is a yamaha and yamaha axles are well known for being made from cheese rather than actuall steel, adding spacers to your stock yammie axle will make it way more likely to bend, especially if you are riding mx on it.
on the front it will increase the scrub radius, making the steering heavier and induce heaps of bump steer ( unless you have a real good steering damper, but even then...)
having said all that if you really must then solid ones aill last much longer and as Bullet said, better to be slightly wider on the front than the rear.
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4stroker
Joined: 15 Jan 2007
Posts: 1420
Location: North Queensland
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| Posted: Thu May 21, 2009 9:20 am Post subject: |
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i hate scrub radius
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phrozin
Blaster class
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Adz
90cc 2 stroke / 110 4 stroke
Joined: 05 Aug 2008
Posts: 64
Location: Queensland
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| Posted: Thu May 21, 2009 5:15 pm Post subject: |
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| someone correct me if im wrong but when your wide at the front and narrower at the rear, in a car that promotes oversteer, vice versa promotes understeer, I'd imagine thats something to consider on a quad also is it not??? |
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bullet
The Day Starts With OZATV !
Joined: 09 Sep 2006
Posts: 1518
Location: Middleton SA
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| Posted: Sat May 23, 2009 10:38 pm Post subject: |
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| Adz wrote: | | someone correct me if im wrong but when your wide at the front and narrower at the rear, in a car that promotes oversteer, vice versa promotes understeer, I'd imagine thats something to consider on a quad also is it not??? |
In a car, the front / rear track does not effect under / overster.
It might seem that way on face value, but most of the other wheel aligment angles and weight distribution makes a much greater difference.
Road cars are usually all designed to understeer first.
It is actually designed in because it is a safer / easie driving condtion to correct.
Most race set up's do there best to get away from factory understeer and change the dynamics to as neutral as possible so the driver can use skill to decide whether they under or oversteer.
Having said that, a wider fixed rear axle quad has to understeer worse because being wider the traction is shared more evenly and the rear wheels can not do different speeds (push straight).
Skinnier rear axles are easier to tip weigth (traction) from side to side, so will turn with less understeer (but morebody roll).
What I don't get is why quads run so much 'toe out on turn' 
They run the same as a car , but rarey just roll around a corner.
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