MXA – Cylinder Works CRF270
Posted by Jay on April 9th, 2013
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Posted by Jay on March 21st, 2013
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Posted by Jay on February 15th, 2013
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Posted by Jay on February 15th, 2013
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Posted by Jay on February 6th, 2013
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Posted by Jay on January 11th, 2013
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Posted by Jay on January 11th, 2013
Yes, especially with a new RMZ250 and a MX11 on some freshly rain-watered California dirt it is truly amazing.
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Posted by Jay on December 11th, 2012
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Posted by Jay on November 28th, 2012
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Posted by Jay on November 26th, 2012
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Posted by Jay on November 14th, 2012
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Posted by Jay on October 29th, 2012
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Posted by Jay on October 26th, 2012
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Posted by Jay on October 22nd, 2012

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Posted by Jay on October 22nd, 2012
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Posted by Jay on August 17th, 2012
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Posted by Jay on July 13th, 2012
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Posted by Jay on April 17th, 2012
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Posted by Jay on March 19th, 2012
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Posted by Jay on March 1st, 2012
Tags: CRF250, CRF270, Cylinder Works Mod, FMF
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Posted by Jay on February 24th, 2012
Tags: Best Bang for the buck motorcycle mods, Best Mods, Cam Pipe or Piston.
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Posted by Jay on February 23rd, 2012
Tags: 42H Endurance Bike, Long lasting CRF
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Posted by Jay on February 2nd, 2012
Tags: Loctite, What Loctite
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Posted by Jay on January 26th, 2012
Tags: Big Bore KX 250, KX269F
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Posted by Jay on January 26th, 2012
Tags: CV4 Radiator Caps.
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Posted by Jay on January 26th, 2012
Tags: 2 stroke top end, Rebuild two stroke, Two Stroke Top End
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Posted by Jay on December 23rd, 2011
Videos that show all about this great engine stand.
Tags: Metaltek Racing
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Posted by Jay on December 12th, 2011
Tags: YZ250 Refresh
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Posted by Jay on November 28th, 2011
Tags: Project Banshee
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Posted by Jay on November 28th, 2011
I was able to go back and visit the main company I work with C&L (Hot Rods,
Tags: C&L Companies
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Posted by Jay on November 15th, 2011
Tags: Alpinestar Tech 8's
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Posted by Jay on September 15th, 2011
Tags: Cylinder Works 727 Raptor
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Posted by Jay on September 14th, 2011
Tags: Thumpity Dirt Bike Magazine
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Posted by Jay on August 31st, 2011
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Posted by Jay on August 22nd, 2011
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Posted by Jay on August 1st, 2011
Tags: Motocross Action YZF 310
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Posted by Jay on July 22nd, 2011
Tags: Motosport Mail Order Dream Ride
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Posted by Jay on July 22nd, 2011
Tags: Honda CR125 - Craigslist Killer Project
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Posted by Jay on July 20th, 2011
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Posted by Jay on July 12th, 2011
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.
Tags: ATV 4 Wheel Action magazine
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Posted by Jay on July 12th, 2011


Tags: KTM Hot Rods
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Posted by Jay on July 12th, 2011
For those suspension experts and just all around good mechanics Pivot Works now has complete shock rebuild kits for the older CR/CRF’s (with Showa shocks). One complete kit fits an incredible amount of Honda’s; CR 250R (2002-2007), CRF 250R (2004-2009), CRF 450R (2003-2008) and the CRF 450X (2005-2009). Retail price is only $89.95 so a great value with the trusted Pivot Works name and reputation!
Tags: Pivot Works Shock Rebuild Kits
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Posted by Jay on July 12th, 2011
Hot Cams has long been the standard for drop-in power. Now there are more options than ever before. Hot Cams gives you more options and more power than any other cams on the market. Stage 1 and Stage 2 for simple drop-in power and then Seven different “builder series” cams that are targeted for the engine builder or garage mechanic who insist on his own “custom grind”. To see the exact lift/duration specs of these cams visit http://www.hotcamsinc.com/News/crf250rSpecs.png . With nine total choices of cams you can pick the cam that is best for your fuel injected CRF 250R with Hot Cams. The complete cams are $269.95-$295.95, some of the builder series do require the use of stiffer valve springs which are available from Hot Cams as well. Hot Cams 2010-2012 CRF250R Cams$269.95-$295.95.
Tags: Hot Cams
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Posted by Jay on July 12th, 2011

Tags: Uni Filter
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Posted by Jay on July 12th, 2011
There is no suspension company that is as diverse as Race Tech who works on ATV’s, Street bikes, vintage and of course dirt bikes. When it comes to something odd-ball they will fix it up. Here is a TTR Shock that needed help with a shaft they got fixed up.
Tags: Race Tech ATV Shock
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Posted by Jay on July 12th, 2011

Tags: MotoSeat. Seat Covers
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Posted by Jay on May 5th, 2011
Tags: More Power Raptor 250, Raptor 250 Hi Performance Piston, Raptor 250 Piston, Raptor 250 Power Package
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Posted by Jay on May 5th, 2011
Tags: CRF250R Big Bore, CRF250R Oversized Piston, Millennium Technologies CRF 264 Big Bore
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Posted by Jay on May 5th, 2011
Tags: CV4 Honda CRF450R
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Posted by Jay on April 14th, 2011
Check out the video about the Project
Tags: Dirt Bike magazine
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Posted by Jay on April 4th, 2011
Tags: Cylinder Works CRF250 Big Bore Kit
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Posted by Jay on March 2nd, 2011
Today I got to do a quick 49 minute moto on my favorite practice track in the entire world, Cahuilla Creek Motocross! Track has been great with the new owners and Ron has been doing a great job on the track prep. After a rain he has it fixed back up about as fast as anyone could. I used to love to ride in the hills in the winter but now Cahuilla is my place and can avoid being hassled by the man and have a great time. The vet/quad track is also fully prepped and a fun layout for those looking for a few less ruts and fast guys. Cahuilla’s main track is good for letting a Vet like me ride on a tough challenging track without having to worry about a ton of double or triples but still challenging enough for fast pros. Fun place for beginner to pro! Now they just added Friday into the weekly rotation for practice as well. Posted in Tracks | No Comments »
Posted by Jay on February 18th, 2011
Tags: CRF300 Video Built by Jay Clark for Thumper Racing
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Posted by Jay on February 6th, 2011
http://www2008.motorcycle-usa.com/374/9142/Motorcycle-Article/Thumper-Racing-Hot-Cams-CRF300R-Project.aspx
Tags: CRF300R, Hot Cams, Thumper Racing
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Posted by Jay on November 8th, 2010

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 the bikes. Of course 300 was the most favorite.
Tags: CP Pistons, Dirt Bike, Dunlop, Hot Cams
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Posted by Jay on November 8th, 2010

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!
Tags: FMF, Honda, Hot Cams, Jay Clark, Motocross, Parts Unlimited, Pivot Works
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Posted by Jay on November 8th, 2010

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!
Tags: Dunlop, FMF, Hot Cams, MXA, Pivot Works, Tom Morgan
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Posted by Jay on November 8th, 2010

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.
Tags: CRF450, Dunlop tires, FMF, Honda, Kiniry, MX Nationals
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Posted by Jay on November 8th, 2010

He came up short the Sunday before the National on a section they ended up taking out for the race. Bummer deal—
Tags: CRF450R, FMF, Hot Cams, Pala
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Posted by Jay on November 8th, 2010

We tried for the last national but go hurt so had to go Johnny Jeldera.
Tags: Dunlop, FMF, FMX, Hot Cams
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Posted by Jay on November 8th, 2010

These come in the already proven wheel bearing kits and have an o-ring on the inside diameter of the spacer so that no water gets in to the axle/bearings.
Tags: front wheel, Motocross, off-road, Pivot Works, rear wheel
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Posted by Jay on November 8th, 2010

A simple drop-in kit that really works!!! Combined with a Hot Cam and FMF pipe.
Tags: ATV, Big bore, Cylinder Works, Dirt Wheels, FMF, Honda, Hot Cams, TRX
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Posted by Jay on November 7th, 2010

4 Wheel Action Project
Great mod by Travis at Thumper!!!!
Tags: 4 Wheel Action, Big bore, FMF, Hot Cams, Thumper
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Posted by Jay on November 7th, 2010

CV4
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.
Tags: CRF450R, CV4, Dunlop, FMF, head porting, Honda, Hot Cams
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Posted by Jay on November 7th, 2010

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.
Tags: CP Pistons, FMF, Jay Clark
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Posted by Jay on November 7th, 2010

CRF450R
He is hard on bikes!
Tags: CRF450, FMF, Fox, Honda, Hot Cams
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Posted by Jay on October 5th, 2010

On the cover of the October issue!!
Tags: 4x4, Cometic Gasket, FMF, Hot Cams, Thumper
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Posted by Jay on September 26th, 2010

Here is a picture of the Cylinder Works 269cc kit that works on all 2001-2011 YZ/WR 250’s. This is the best mod for your money on a YZ/WR 250. Only $599.95 Cylinder, piston kit and gaskets!
Tags: Big bore, Cylinder Works
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Posted by Jay on September 26th, 2010

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
Tags: FMF, Hot Cams, Hot Rods, Jay Clark, Moto USA
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Posted by Jay on January 20th, 2010
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.

Tags: CP Pistons, Fast Core Mods, FMF, Hot Cams, TWMX
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Posted by Jay on January 20th, 2010

Bigger is Better for even the little machines!
280cc big bore with a CP Piston, FMF Pipe, Millennium Cylinder plating and Thumper put it all together for Cycle World.
Tags: CP Pistons, FMF, Millennium, Thumper Racing
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Posted by Jay on January 20th, 2010
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!

Tags: ATV, CP, FMF, Hot Cams, Jay Clark, KTM, Quad, Thumper Racing
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Posted by Jay on January 15th, 2010
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.

Tags: CP Pistons, FMF, Fuel injection, Jay Clark
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Posted by Jay on January 2nd, 2010
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.

Tags: CP Pistons, FMF, Jay Clark
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Posted by Jay on January 1st, 2010
Check out this cool Motorcycle USA tire change video we just did during shootouts.
http://www.motorcycle-usa.com/708/Motorcycle-Video/Dunlop-Tire-Changing-Guide.aspx
We had a great time making it and I hope you find it useful.
Tags: Dunlop, Geomax, Jay Clark, MX51, Tire Change
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Posted by Jay on January 1st, 2010
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

Tags: Cylinder Works, FMF, Hot Cams, Jay Clark, Pivot Works, Vertex Pistons
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Posted by Jay on December 26th, 2009
150cc kit with a Hot Cam and FMF pipe rips and will soon be in Cycle News.

Tags: BBR, FMF, Jay Clark, Pivot Works
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Posted by Jay on December 20th, 2009
The same for nearly 20 years the Blaster can use some extra power and Dirt Wheels will have this quad in very soon.

Tags: FMF, Hot Rods, Jay Clark, Vertex
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Posted by Jay on December 20th, 2009
Custom CP Piston matched up to a Thumper Advanced Sleeve. Travis at Thumper got this running really good and way more power than stock.

Tags: CP Pistons, FMF, Jay Clark, Thumper Racing
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Posted by Jay on October 5th, 2009
Well, after twelve long weeks of re-habing my dislocated shoulder I am back on a bike (still probably too soon but I have to do it). Much slower of course but I am riding. I have only rode a few times and only at Cahuilla Creek Motocross. Why, because for some reason I feel the safest there, not too crowded and just so much fun. This track is like the tracks I make in the hills come Winter time. Russell Wayman shot video and Andy Fritts supplied the use of his Camera. Not too exciting but I think you can see how fun the track is (especially when off for twelve weeks). I hope to be REM soon and get back to battling with guys I used to smoke.
Session 1
Session 2
Check out their website at www.cahuillacreekmotocross.com
Tags: Cahuilla Creek Motocross, CRF 250R, FMF, Honda, Hot Cams, Jay Clark
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Posted by Jay on August 30th, 2009
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.

Tags: 700XX, CP Pistons, FMF, Honda, Hot Cams, Pivot Works
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Posted by Jay on August 20th, 2009

CRF 250R and 450RHheads
Millennium Technologies has cylinder head repair that uses their simultaneous 5-axis computer numeric controlled cylinder head porting center (what is that? so very trick machine to re-cut your seats and install valve guides). The work is great and is as good or better than stock and can save you some money on and let you keep that modified head in use.
Tags: CRF, Damaged head, Guilds, Honda, MX, Seats, Springs, Valves
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Posted by Jay on July 13th, 2009
What is the most important mod you can do to your current 4-stroke? Make sure it is jetted perfectly. 250F’s are in need of this most and Ron Wood at TokyoMods does a awesome job of making sure your carburetor is perfect after his mods are done you will get rid of any bog you might have. So, if you still have a carbureted bike get with Tokyomods at www.tokyomods.com

Tags: CRF250R carb Ron Wood Tokyo mods Motocross
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Posted by Jay on July 5th, 2009
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.

Tags: FMF, Hot Cams, Millennium
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Posted by Jay on June 25th, 2009
Since 1968 Mammoth Mountain has been going strong and we have been a part of for the last 16 years. We enjoy the great racing and the outdoors of Mammoth. C&L: Hot Cams, Hot Rods, Pivot Works and Cylinder Works are big sponsors as usual. Last week was the Vets then the Mini’s and on Friday starts the really fast guys.

Tags: Mammoth Motocross, Motocross
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