Author Topic: Newbie 1989 trx 250r project (Read 9205 times)

mudbogger · « **Reply #15 on:** April 09, 2016, 08:07:59 PM »

yeah, I have dealt with them in the past but the space needed to get the carb all the way into the intake is way too much-I do have a alumn BOX that I picked up off Ebay from CDR? performance but what intake do you use for it? The stock is not going to work on that box-

thesmith87250r · « **Reply #16 on:** April 09, 2016, 08:41:01 PM »

That i do not know. Maybe another member will have a answer for ya.

broken1 · « **Reply #17 on:** April 09, 2016, 09:56:06 PM »

With all the oem intake components & airbox mounted there's a 1" gap? Got pics?

mudbogger · « **Reply #18 on:** April 10, 2016, 08:22:28 AM »

Yeah I got it on the carb without using a spacer but then you can't get it into the rubber grommet because it is too far in, hence the question about the spacer.
I was also looking to see what was being used with the aftermarket alumn box in regards from the carb to box inlet. Is it from a 3 wheeler?

mudbogger · « **Reply #19 on:** April 10, 2016, 08:23:51 AM »

Yes I will take a pic and post. Again the ride is in my unheated garage so the rubber is not flexible at all but the gap seems way too much.

thesmith87250r · « **Reply #20 on:** April 10, 2016, 08:51:12 AM »

3 wheeler air box is totally different stock vs stock. I would think the same when aftermarket

mudbogger · « **Reply #21 on:** April 10, 2016, 12:07:55 PM »

Pic. This is without the rubber grommet installed for the air box in the frame.

thesmith87250r · « **Reply #22 on:** April 10, 2016, 01:09:29 PM »

The reed spacer will take care of that.

mudbogger · « **Reply #23 on:** April 10, 2016, 04:33:33 PM »

Thanks for the help

hickwheeler · « **Reply #24 on:** April 11, 2016, 12:10:48 AM »

If you are wanting a rad valve. I have one that doesn't have the reeds. I would give ya a deal

mudbogger · « **Reply #25 on:** April 11, 2016, 06:31:18 AM »

Thanks I have a valve already ready for install. My problem with that is the stock carb is way to small for it, hence the question about aftermarket carbs.

hickwheeler · « **Reply #26 on:** April 11, 2016, 01:23:19 PM »

I think they made different size boots. Trx has a smaller carb stock than cr250. Mine was marked for the smaller carb. I can take pic for you

StrokedAZ · « **Reply #27 on:** April 12, 2016, 01:08:27 AM »

If I remember the cr250 rad valve was designed for a 38mm carb whereas the trx250r rad valve was made for the 35mm carb. You probably have the cr version. I have a rad valve for the trx (i think it had a 04 stamped on the side) and it fits perfect.

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broken1 · « **Reply #28 on:** April 12, 2016, 02:17:26 AM »

I have the CR & TRX rad valves & the valve inlets & boots were all the same & fit the bigger carbs. Boyesen might make a boot to work with the stock 34mm carb but I think 36mm is where the larger Keihin throats start & those are the standard boots on rad valves. If Boyesen doesn't make an adapter for the rad valve to stock carb you could make your own pretty easy.

mudbogger · « **Reply #29 on:** April 24, 2016, 08:47:42 PM »

Thanks for the help, I spoke to a Boyesen rep and they indeed do make a valve for the 34mm stock carb, which is what I will order. I have the rad valve here and the spacer did indeed take all the space out.