Can anyone tell me what size swingarm I should get for a 502 yfz? Would a 4" be long enough?

 

4" to 6" will keep the front down but will limit your tight turning playing around fun

 

i put a plus 4 on a yfz and it is great you can launch like no tomarrow and it rides nice watch yor chaun roller. if it was mine i would go plus 2 but i like to wheely every where.

 

my friend has the yfz 505, and the +6 he has is OK, and i mean its ok, when he wants to launch it hard the +6 is not enough. and he is switching to the +8. also this bike is lightened...280lbs. check my pics to see the bike.

 

Is your friends YFZ running alchohal or race gas? Who won his class at quad wars?

 

yes he is running alcohol, im 90%sure. Eddie Sanders Racing or ESR TRX480R beat him.. none the less that 502yfz cheated and still loss. he competed in a class that was 500 and under and his cc's are 502. he claims it was a 490 when he was racing and the truth finally came out.

they both ran in the
500cc and under OPEN class

that yfz should have ran with the raptors in the
500cc and OVER class

 

this is a 505yfz build by RIS design which lost to the ESR 480R, both are fast, look how fast the 400ex is stroked to a 465ex. here is the video you be the judge my freind.

cut and paste the link below to view the video

http://www.raptor660fam.com/open%20500%20under%20cc.wmv

 

those are some impressive quads. Im pleased to see the outcome of the hondas. however a little disappointed in the yammi's especially being up on cc's

 

yah i know, both are lightweight, the esr trx also weighed more than the 505yfz.

 

if you are going to run front brakes & A-arms ect... i would go with a 4" once you lighten the front like the RIS bike then go longer.
my 2 cents