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I've been taking a break from atvs, forums and wrenching for a while lately... Now I'm getting back into my 250R's and 450R's and have kinda hit a wall. The "no fun no more" wall. My 07 450R is a Demon SB/SS pump gas "sleeper" with right at 60 hp in it's current tune. The bike is fast, and...

Here's some of the toys, loaded up and heading to the dunes... And one of my "stock" 450R, taking a break from some Southern Oklahoma trails.

Thank you for the welcome. I just realized that my horsepower and torque readings were reported with SAE conversion factors, but most shops report them in Standard STD or STP measurements. I asked for an updated printout, which Randy will be emailing. Does anybody have any experience with the...

Thanks for all the compliments, this is a great site, without all the BS of some of the others. I've tried the Ohtsu 501's with good results, but these Dunlops are the ones Rocky Mountain was selling at one time for very cheap. They do okay, but really spin compared to the factory 450R/Raptor...

Oh, I know... This one is a handful to ride (was way worse with a more bottom-end cam), but I really ride my 250R or 330R more. Both of them have the suspension to work well at these power levels. The 450 was just an experiment, trying different cams and parts to attempt to ease the "hit"...

Thanks! 450cc, Demon CNC +1 head, CP 12.5:1 piston, Web 208/921, Dasa Classic, bored FCR, FCI... Stock appearing trail cruiser (sleeper).

For my birthday, I slipped away to the Stewart's ATV dyno shop to tune my latest 450R project. It was way too hot (105 degrees) to get better numbers, but I'm fairly happy with it for a stock bore, stock crank on pump gas... Below is one of the dyno sheets, and a couple bike pics. Let me know...

I've been running a CP 12.5 piston for a couple months and couldn't be any happier with it... But my cylinder and crank were in good shape. If I was forced to rebuild, I'd be shooting for 510+ cc's at least. That was my original goal when I had the head built, so it's a bit overkill for my...

I've ran Rotella 15W40 (white bottle) in my 450 engine side and Honda "Red" trans oil in the clutch side for several years. When I recently tore it down to upgrade the piston, head and clutch, everything looked especially clean (still had factory looking crosshatch after 6 years). I usually...

Thanks for the warm welcome... I'm glad there are some 250R and 450R guys still out there. Most times when I go ride, younger guys come up asking what my 250R's are, especially the blue one.

Here's a pic of the trike... It's an alky-ported 260cc, please excuse the gold wheels, normally it wears Haulers on Douglas .125's...

Thanks! I've never talked myself into selling a 250R, only added to the collection. My brother sold one of his 250 trikes, but got it back soon thereafter. I figured it was a sign to hang on to them.

Hello, I thought I'd say hello. I'm Nic McMillin, from Marietta, OK (far southern edge of Oklahoma, and 250 miles away from Little Sahara). I've been involved in ATV's for at least 20 years and have had many Honda's and Yamaha's in that time. I own several 250R's and got two 450R's a couple...

I'm looking for a +4 swingarm for my 07 duner and am also looking for a stocker to replace a buddy's damaged 08. PM or call/text 580-276-6732 with what you have.