I race MX with my 660 raptor which already hads a full lrd exhaust revbox, jetkit, nerfbars.
I either want to widin it out (a-arm,axle,swingarm,etc.)

or some more power (crank,cams,piston,etc.)

WHICH SOULD I DO

 

how much money u have to spend cause i think that the quad has plenty of power. so its a matter of money if you got verry little to spend the just go with some wheel spacers but if you got money then go with some arms and new shocks and a new rear axl it just depends on the money situation and what tipe of racing you do.

so tell me what type racing you do and the money and ill try to help you from there.

 

I JUST DO MOTOCROSS

IVE GOT BOUT 1500 TO WORK WITH

 

i would go with a front arm kit for racing you see them avetized every wear and the brand realy is not a big deal they will all help. and in the back buy the 2 inch spacers it will just widen you out a bit trust me you will be more cinfident to slide any turn at much hight speed you will gain lots of time on your lap. i hope i helped you

 

what size sprockets should i use in the front and back

 

I hate to say it with sprocket size, but this is kinda a hit and miss. It really depends on the track length and how technical the track is. I am sure it will be up for discussion but we found that going up 1 tooth on the front sprocket was perfect with the 18" tires. If i'm not mistaking one tooth on the front is equal to 5 or 6 on the back. As far as widening or HP, I think that quadracer95 is correct. You can have all the Hp in the world and if you can't use it, it is wasted money. Widening the front with extended A-Arms would be the best money spent, with just the wideners on the back. This will amaze you as to how hard you can go into corners and still be in shape to excellerate after the corner apex.
Have fun and good luck

 

What you should do is get a MX friendly quad. I see "0" raptors at the nationals. Must mean something eh....
BUT, I imagine you like your rappy and don't want to buy/another machine so I'll go with a-arms, shocks and a axel. You'll have to save up a lil more tho as the shocks alone can come to $1500. [img]i/expressions/face-icon-small-sad.gif[/img]
FYI: I run LoneStar stuff and PEP shocks.[img]i/expressions/face-icon-small-smile.gif[/img]
Good luck and have fun.

 

definately A-arms
and as far as the engine goes i would put a more geared down sprocket
the rappy makes good top end
so if u race moto cross then i would think that u need more bottom end
so i would get the A-arms and a geard down front sprocket
couldnt tell u what size though

 

a quad with the better suspension will do better on the track than motor alone.

 

Ya sjbr549 is right raptors are pretty tall so they like to tip I got the front +4 inches wide and the same with the axle(still have stock hubs) but I don't know what to tell u about shocks unless you got some money but my triple rate Black Widows are awesome