2004 Honda CRF250X

[Wild_Alaskan]

I just upgraded my intakes to stainless steel after i blew up the roller in the head. I did a piston change as well and found my top end was in really good condition otherwise. I don't know about making it 15,000 miles on a single ring piston with a 3/4 inch skirt though!

[SpudRider]

Originally Posted by Wild_Alaskan

I just upgraded my intakes to stainless steel after i blew up the roller in the head. I did a piston change as well and found my top end was in really good condition otherwise. I don't know about making it 15,000 miles on a single ring piston with a 3/4 inch skirt though!

How was the roller damaged?

I know what you mean about the two-ring piston with the short skirt. I'm not predicting anything, merely hoping.

[SpudRider]

Some of the CRF450 owners are installing a TRX450, 3-ring piston in their bikes.

http://www.thumpertalk.com/topic/778...-in-a-crf450x/

[pete]

Originally Posted by SpudRider

Some of the CRF450 owners are installing a TRX450, 3-ring piston in their bikes.

http://www.thumpertalk.com/topic/778...-in-a-crf450x/

thats a better looking piston but still a short skirt..

the WR250R has a long piston uses the same bore & stroke
as the WR250f but is only a 4 valve motor... don't think
you could machine a 5th valve pocket in the piston...
with the right valves / piston / compression ratio theres no
reason you couldn't make the motor last a lot longer.

I looked at the WR250R but they are a 2008 onwards model
and hold there prise... the WR250f takes a rekluse clutch..

edit.... just found this for a WR250F.. http://www.ebay.com/itm/350298522813...#ht_1134wt_932
full skirt 3 ring piston ... high compresion ,but a few base gaskets will sort that..





.....

[SpudRider]

This afternoon I installed a Durelle Racing Gel Seat on my CRF250X. I purchased a Harbor Freight pneumatic stapler for the job, and when it worked, it worked well.



After finishing the installation, I took the bike for a 31-mile ride to test the saddle's comfort. This saddle is definitely more comfortable than the stock saddle, and the saddle height is also definitely lower.



Here's how the saddle looks mounted on my CRF250X.









I buy a few things from Harbor Freight, and I have found some good bargains there. However, I will be returning the HF pneumatic stapler. It easily drove the staples into the seat pan, but it frequently jammed. Also, the magazine would frequently pop open, and drop all the staples out of the gun. Nevertheless, it finished the job, and was still easier to use than a hand stapler. Also, Harbor Freight has a good return policy.

My first impressions of the Durelle Racing Gel Seat are very favorable, and I think it was a good purchase. As I acquire more miles in the saddle, I will report my further impressions regarding this product.

[FastDoc]

Originally Posted by pete

thats a better looking piston but still a short skirt..

the WR250R has a long piston uses the same bore & stroke
as the WR250f but is only a 4 valve motor... don't think
you could machine a 5th valve pocket in the piston...
with the right valves / piston / compression ratio theres no
reason you couldn't make the motor last a lot longer.

I looked at the WR250R but they are a 2008 onwards model
and hold there prise... the WR250f takes a rekluse clutch..

edit.... just found this for a WR250F.. http://www.ebay.com/itm/350298522813...#ht_1134wt_932
full skirt 3 ring piston ... high compresion ,but a few base gaskets will sort that..





.....

Interesting.

I don't know what the YZ400F's piston looks like but it has a 5 valve head with stainless steel valves. I think Yamaha changed to titanium valves for the 426.

[zingshoen]

that would be nice on my suzuki, but from the website it seems they only make them for hondas.

[FastDoc]

Great mod!

I recognize that trail. Is that where Roger rode with one footpeg?

BTW check your PM...

[pete]

thats a nice bike mate... light & nimble

[SpudRider]

Originally Posted by pete

thats a nice bike mate... light & nimble

Thank you, Pete. Indeed, I am enjoy this motorcycle a lot.

[Weldangrind]

Spud, that last photo from the rider's perspective could be an ad for Honda. Very nice.

[SpudRider]

Thank you, Weld.

[SpudRider]

Originally Posted by FastDoc

Great mod!

I recognize that trail. Is that where Roger rode with one footpeg?

BTW check your PM...

Thank you, Doc. No, Roger broke his foot peg at the base of this trail, before we headed off to the other one.