Author Topic: 450r air box on 250r??? (Read 5930 times)

quadracer239 · « **on:** November 24, 2013, 03:45:17 PM »

I have a 1987 250r. I picked up a 40mm carb, I was wondering if a air boot an box from an 05 450r wld fit in the frame an around the rear shock???

05450r · « **Reply #1 on:** November 24, 2013, 09:08:23 PM »

Im gonna say probly not, but a yfz450 should

sameltoe · « **Reply #2 on:** November 24, 2013, 09:32:34 PM »

Here's a pic of a o5 trx450r airbox. I would probly say no go

quadracer239 · « **Reply #3 on:** November 25, 2013, 09:11:39 AM »

Have u known anyone that has done this set up?(yfz450 air box on a 250R)

JoePA · « **Reply #4 on:** November 25, 2013, 09:35:49 AM »

Troybuilt put YFZ boot on his budget build and said it worked great. I'm going to go down this route as well and get away form the ESR intake. The ESR is a good intake just not good for a muddy, wet MX race!

jamieg45 · « **Reply #5 on:** November 25, 2013, 09:43:52 AM »

Nice pic sam, it shows how the boot is straight out and doesn't go around the shock, and I am gonna get me a yfz boot for the walsh. Because the oem trx 250 boot has just a little disconfiguration to it.

05450r · « **Reply #6 on:** November 25, 2013, 09:49:14 AM »

That is the setup that was on my hybrid, it is also for sale..lol

quadracer239 · « **Reply #7 on:** November 25, 2013, 10:04:27 AM »

will any year set up work from the yfz?

05450r · « **Reply #8 on:** November 25, 2013, 10:08:28 AM »

04-08. The 09 up is different

Rupp250 · « **Reply #9 on:** November 25, 2013, 10:34:23 AM »

Do you need an 250r intake boot?
I have one I dont need if so.

quadracer239 · « **Reply #10 on:** November 25, 2013, 11:30:35 AM »

I just picked up this 87 250r a while back, it doesn't have a air box just a clamp on filter,the stock carb was broken so I picked up a a/s 40mm carb. I was looking at getting an air box an boot but wanted some thing diff then stock

05450r · « **Reply #11 on:** November 25, 2013, 12:39:52 PM »

I would make you a good deal on the setup in the pic

Rupp250 · « **Reply #12 on:** November 25, 2013, 01:28:50 PM »

Well let me know if you want the stock setup. I have the intake tube and air box, think it is my for sale add.

troybilt · « **Reply #13 on:** November 26, 2013, 01:51:23 PM »

Correct, the box I reverse engineered for Jerry was originally drawn up by Mike (honda265r??) anyway.... the yfz boot works with this box and has more room. The 450r box will not work, I have both airboxes at my disposal and the 450r will not fit. Note, before anyone tries to get a yfz boot on a stock 250r box, don't the yfz boot has a much larger opening where it connects to the box, you'll need a custom box which is what I modified on the original designed box from Mike. So I can run YFZ boots, with 250r Uni filters and not have to pay 100 bucks more for the Pro Design billet ring and filters... hope that makes sense. I can make more of them.

JoePA · « **Reply #14 on:** November 26, 2013, 01:59:21 PM »

Let us know if you make more air boxes for the YFZ intake. I'm interested!!