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CRF478X Dirt Bike Magazine

MXA KX100 Build in the May issue of MXA

Identity Theft R-to-X Dirt Bike Magazine

Suzuki RM-Z250 built to launch the new Dunlop MX32

2006 CR250 MXA Build

2010 CRF 250R Rebuild

Great article in the current MXA — RMZ’s



Not every kid is ready for a 224-pound, 250cc four-stroke—we buy a used $700 minicycle that can race the Supermini, 125 two-stroke and 250 Novice classes     For more information, go to Tom Morgan Racing at www.morganracingengines.com and Race Tech atwww.racetech.com.

Upgrade – 2013 RMZ450

2014 CRF450r Big Bore in Racer X

2013 CRF450r project bike in Dirt Rider

Suzuki LTR474 -ATV Action Story

On the cover and inside the January issue of ATV Action (page 58-62)

Project RMZ450 – January issue of Racer X

Racer X Tested: 2013 RMZ250F Big Bore

Here is a video that goes along with the 250 Big bore shootout we did a few months back.

Another great MXA article. TMR worked his magic on our CR112.

Here is a great story on a YFZ450 featured in ATV Action.

Great story on the ATV Rider- Cylinder Works Big Bore Raptor 727cc

A great story in Dirt Bike magazine with our project WR450’s

Click for the full story!

Dirt Bike Magazine CRF 250R mods


Check out this new video on Racer X with a YZ450 we fixed up.

Here is a link to a great story on a RMZ270 project from Racer X

Check out part one on our Dirt Rider project KXF250

Racer X Tested: Install Cams


The Forsaken: A motorcycle is saved

Beyond the 250Fs How do the 250s stack up as 270s

Cylinder Works YFZ478cc Big Bore


Big Bore Vertex RMZ Project Bike

RacerX 125

Racer X Tested: CRF270cc Cylinder Works/Hot Cams/FMF

Best Bang-For-Buck Mods


42-Hour Endurance Bike

  Click for the full story              

MXA Tested KX269F

Click for the full story

YZ250 Refresh


Project Banshee


Cylinder Works 727 Raptor

Click for the full story.

Thumpity ThumpThump Dirt Bike Magazine WR250

Click for the full Dirt Bike Magazine Story    

MotoSport Builds a Dream Honda 450 Quad

Next great MXA project

Motocross Action YZF 310

Mail Order Dream Ride

Jay Clark Builds a Mail Order CRF250R for the Pages of Transworld Motocross:

Honda CR125 – Craigslist Killer Project

Check out this Jay Clark Built CR125 Project Bike: Motorcycle USA Story: http://www.motorcycle-usa.com/374/10557/Motorcycle-Article/2003-Honda-CR125—Craigslist-Killer-Project.aspx Motorcycle USA Video: http://www.motorcycle-usa.com/1190/Motorcycle-Video/2003-Honda-CR125-Craigslist-Project.aspx

ATV 4 Wheel Action magazine

Check out this cool little race quad we helped with for a young lady from Riverside. Look for the full test in the next ATV 4 Wheel Action magazine. 

Raptor 250 Power Package

Millennium Technologies CRF 264 Big Bore

CV4 Honda CRF450R

Check out the cover of the May issue of Dirt Bike magazine for my latest project

Click on the cover for full story Jay Clark Built CRF250X Cover        Check out the video about the Project

CRF300 Video Built by Jay Clark for Thumper Racing

Thumper Racing Hot Cams CRF300R Project. Here is a link to one of my latest project bikes


Dirt Bike Magazine three CRF250’s

The new CRF250R’s are fuel injected and a complete new engine. Travis at Thumper got one to 280cc with a big bore and a stroker version out to 300. We did the 264cc version here. Tested one day at racetown and one at Piru and had about eight different test riders all love each of

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2010 CRF450R for PU

Parts Unlimited magazine got to test the best mods on a current CRF450R– Hot Cam and high comp piston. Josh Brown for testing riding and Kenny Jones shooting the pics. Came out great!

MXA Project YZF450

Tom Morgan at Hot Cams came up with great cams and mapping to put this mod on top of MXA’s mini-test a few months back!

Got it this time

Last minute Hot Cams got Kiniry to fly out from New York state and give it a shot and see the Racer X project bike through.

Johnny gave it a great shot!

He came up short the Sunday before the National on a section they ended up taking out for the race. Bummer deal—

FMX Best Whip Champion Honda CRF450R Race Bike

We tried for the last national but go hurt so had to go Johnny Jeldera.

Honda’s Proven TRX 450R with a Cylinder Works Complete Big Bore Kit

A simple drop-in kit that really works!!! Combined with a Hot Cam and FMF pipe.

Honda 700XX Big Bore 4 Wheel Action Magazine Project Quad

Great mod by Travis at Thumper!!!!

TWMX project by CV4, FMF, Hot Cams and CP

Last year we went for the 470 big bore but this year we kept it stock bore and hit a homer with this full CV4 mod.

FMF Got A New FI Harley For Project Bike!

CP made the Custom pistons, Race Tech took care of the suspension and Bennetts Performance put it all together. FMF made custom pipes with self tuning Dynojet power Commander. Will be in Cycle World shortly.

2010 CRF450R Ryno Race bike- Great Project

He is hard on bikes!

Dirt Wheels Thumper Racing Rincon Big Bore

On the cover of the October issue!!

Cylinder Works and Hot Rods 284cc kit for the YZF 250

Fits all current YZF250’s and either the cylinder big bore kit alone at 269cc or stroker to go to 284cc — This one was for Moto USA

Fast Core Mods CRF469cc

Transworld Motocross just tested the latest beast I created. Fast Core Mods did the head Work, Millennium the big bore cylinder and CP the high compression piston.

Thumper WR250X Big Bore

280cc big bore with a CP Piston, FMF Pipe, Millennium Cylinder plating and Thumper put it all together for Cycle World.

Thumper Racing Knows BIG with the KTM 600

Brian at SRC worked with Thumper Racing to make the fastest thing we have ever riden. Josh in his Fox gear is a Quad pro now!

2010 CRF250R Big Bore into 264cc

Stock is 76.8mm and big bore is out to 79mm making it 264cc and the results are great! Big power gains for low cost in the new CRF250R with no fuel mapping changes.

Dirt Wheels 400 EX into 417cc Bolt on Mods

The Honda 400 motor is proven but can just use a bit of a boost from a cam and piston. Hot Cams and CP took care of that with a FMF pipe.

Dirt Bike YZ284cc Vertex and Cylinder Works

Adam Booth from Dirt Bike came out to C&L in Iowa to see the plant and ride the Tom Morgan modified 2010 YZ250 into a 284cc

BBR Has A Great 150 Kit For The Very Fun To Ride TTR125

150cc kit with a Hot Cam and FMF pipe rips and will soon be in Cycle News.

Yamaha Blaster Two-Stroke

The same for nearly 20 years the Blaster can use some extra power and Dirt Wheels will have this quad in very soon.

Dirt Bike Magazine CRF230L Street Legal with 250 Kit

Custom CP Piston matched up to a Thumper Advanced Sleeve. Travis at Thumper got this running really good and way more power than stock.

4 Wheel ATV Action Mag Honda 700XX Photo Shoot

Joe Kosch at 4-Wheel ATV Action just snapping some pics of ATV Pro-to-be Russell Wayman on the built 700XX. Look for this soon in 4 wheel.

TWMX Poster Bike

Fast Core Mods did the full head work and Hot Cams brand new stage 3 cam went into the 469cc Millennium cylinder. FMF Pipe and some serious polishing. One trick 09 Honda CRF450R (well 469cc) We will see this on a TWMX poster coming up soon.

MXA August Issue

Check out the upcoming August issue of Motocross Action Magazine to see a full test on the 09CRF450R made into a 469cc monster. Great help on this project-thanks to all and especially Tokyo Mods. Just saw the article and not as good as I would like as they felt we had too much bottom end.

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Dirt Wheels Polaris 450

FMF Polaris 450 project with Fox Shox — came out great. Cain was very impressed with the mucho power.


Great Honda 250F made even better! Thanks JC and MOTOUSA.COM

Dirt Wheels LTZ250 Shoot

Here is a pic of the Hot Cams, CP Piston powered LTZ250. You’re not too impressed well there are not many parts for these quads out there and now there is a good kit to power up your wife or daughters quad.

Dirt Bike– BIG TEST

Dirt Bike Ron Lawson, Tom Webb and Adam Booth all enjoyed my 4 250F 2mm over project at Racetown

Project 2009 Honda CRF250R

For this TWMX project we built up a CRF250R into a full blow Arenacross pro level race bike. I didn’t of course have a full blown pro level Arenacross racer so we did the best we could and kinda did a extreme home make over and let made the dreams of a kid from the

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