116 replies to this topic

[stan_97 TT Bronze Member]

i have a 1997 XR250R i want to mod, the previous owner has removed whatever is saposed to be in the exhaust because att there is now is a spark arrestor screen. i'm wondering what typre of performance air filter to buy, if i should make a little pre filter when i remove the snorkle, and what jetting i should use? i ride from sea level to about 1200 feet.

[r00t4rd3d TT Silver Member]

Lots run the foam UNI for a filter. I personally have a K&N one. People put metal screen over the snorkel hole to filter.

135main 48pilot most start with that after gordons mods. Im not sure though with you cause of your elevation. Someone else might know.

[stan_97 TT Bronze Member]

ok thanks.

[Z06PSI TT Bronze Member]

Uni here.

[stan_97 TT Bronze Member]

i'm to find a uni filter, does anyone happen to know the part number for a UNI air filter that fits a 1997 XR250R?

[Z06PSI TT Bronze Member]

http://www.bikebandi...g=8406&t=1&td=1

[CrashFire TT Newbie]

Has anyone done a DUAL SPORT KIT  on their XR400?  I'm looking to do so on my bike.

[red47403 TT Bronze Member]

Yes. Used this kit:
https://www.bajadesi... Kick Enduro Wt

and added:
http://trailtech.net/endurance.html

Don't install the rear light from Baja, you can easily re-wire the existing light to take a two element bulb (brake & running light).

[YetiX TT Member]

It's been asked in here close to eleventy billion times, but no one has come through.  Can someone PLEASE post pictures of their drilled exhaust tip?  I just want to see where people are drilling the holes.

Thanks!!

[teed 213 TT Member]

Yes can someone post a pic so we can see>

[r00t4rd3d TT Silver Member]

[YetiX TT Member]

r00t4rd3d said:

  Thanks!

[Coolerking TT Bronze Member]

those holes look too large....

[r00t4rd3d TT Silver Member]

I used alittle bigger drill bit then recommended cause I like it kinda loud.

[Z06PSI TT Bronze Member]

Lol......

[jokerflingo TT Gold Member]

Just take/drill out the baffle, its the only way to do it, leave the spark arrestor intact too

[andy_ TT Newbie]

Just did these mods to a 2001 XR250R, wow what a difference!  I am still running the stock air filter (the Uni is on order), but removing the pathetic CA 122 main jet alone was well worth it.  I did the exhaust grinding with a carbide cutter in a cordless Dremel, and it went pretty quickly.  
Thanks for the post.  Knowledge is power - in this case a lot more power....
Andy

[eric92 TT Member]

Child said:

A 36mm Mikuni like the one off of an 05 DRZ400SM? I have the stock carb which is a 36mm Mik that I trade out for a FCRMX carb, so if that'll fit I'd love to stick that on the XR!

Anyone here got any experience with useing the FCR39 carb on a XR400?
I found one locally (I think it's from a YZ/WR400) for about 2 hundred bucks but I'd like to know jetting spec's, cables etc for my 1999 XR400?

[jdubb75 TT Titanium Member]

Deleted by jdubb...

Edited by jdubb75, 21 February 2011 - 09:45 PM.
Started a new thread...

[YHGEORGE TT Addict]

Lots of really good info here for power. But, I need suspension help to use the power I have. Woods use, 196lb sr B rider. My bike has Pro Action mods springs and valving that were done for my weight when I bought it. Have since found the shock spring is really suited for a 250 pounder. Would like to hear some shim stacks for the stock forks and springs I need. Think I'll take the shock to a pro. Thanks.