BannedCR500Riders.com

Hey guys,I have spent half hour looking here and still havent found the info Im after.Can someone please tell me which air boot I need for the CRF 250,and which swingarm spacers I need for both bikes.Or maybe links to other builds of the same models...... These will take a while till they are finished,but will post pics once complete.Cheers

I am assuming you are putting a CR500 engine in these frames.

For the 04 CRF250, swingarm spacers are as follows. ( OEM Honda part #s )

Right side 52141-KZ4-J40 Bushing ( 59mm long )

Left side 52142-KZ4-J40 bushing ( 54mm long )

Check what length bushings are in the swingarm now, one might be the right length already.

You can thank Bob for this information.

As for the spacers on the 98 CR250, you will need a 4mm spacer on one side and a 6mm spacer on the other. CHECK with Danny on this one.

Check out these threads for more help.

http://www.bannedcr500riders.com/board/ ... .php?t=894

http://www.bannedcr500riders.com/board/ ... php?t=1270

http://www.bannedcr500riders.com/board/ ... .php?t=903

http://www.bannedcr500riders.com/board/ ... .php?t=410

http://www.bannedcr500riders.com/board/ ... .php?t=189

http://www.bannedcr500riders.com/board/ ... sc&start=0

http://www.bannedcr500riders.com/board/ ... php?t=6184

yup, and for the gen-4 you only need to buy the 59mm and move the 54mm to the other side.
for the gen-1 use the stock chassis airboot and give it a little heat.
on the gen-4, assuming its an R not an X, I found the gen-1 boots to fit well, specifically a '98-99 cr125 (its a tighter fit on the carb, but fits the chassis and lines up perfectly) or a gen-1 250 boot, '97-'99.
I built 2 '04 crf250r conversions and each I tried a number of boots and used one of each that I listed, the 125 was a cleaner fit. the cr500 boot is too short for the R chassis, but works well for the X chassis.

Much appreciated fellas.Makes things a hell of a lot easier for me !

on the 250f we did we adapted the steelie boot+ filter cage into the airbox

Roostius_Maximus wrote:on the 250f we did we adapted the steelie boot+ filter cage into the airbox

X2

was that an R or X, the airboxes are different. when I tried a '00 cr500 boot on the crf250r, there was like an inch gap. ofcoarse I also clocked the motors as far forward as possible.

Yeah Danny its the R model CRF.Thanks again,need to order a heap of stuff online so was trying to sort out everything I need to get it all on the 1 order.