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2009 YFZ450R     2010 YFZ450R/X

2011 - 2013 YFZ450R

Suspension:

For XC racing we offer narrower a arms. The stock front shocks have large bodies and large shafts which cause several problems - if you get them setup that they are plush - they will blow thru the travel and bottom on big hits. If you set them up so they dont bottom  - they will ride harsh.

For anyone serious about racing this quad you may want to check out aftermarket front shocks with smaller bodies and smaller shafts to give you good bottoming resistance while still maintaining a plush ride.

The rear suspension linkage has a very high progression ratio which causes harshness toward the bottom of the stroke. Our Econo link with take some of the progression out and is an excellent link for MX racing due to the smaller tires and the different needs for MX - it is also an excellent link for the trail rider who just wants to lower the quad and soften it. 

For the series racer we offer the Pro Dual Link that give an even greater progression change then we can achieve with one link and also offers a better leverage ratio. This link however requires a shorter shock then stock.

YFZ PARTS

ECU

Foot pegs................................................................#09-201..............................................$99.95

These have the gripper teeth and are lowered 1/2 inch from stock but still offer excellent ground clearance.

MORE INFO

Suspension

Rear Shock Conversion (Basic).........................................................................................$395.00

Includes: Revalve, Respring, and Econo Link.

Rear Shock Conversion (Pro).............................................................................................$595.00

Includes: Revalve, Respring, Pro Dual Link, and a new high flow piston.

HLS Pro front shocks..........................................................................................................$895.00

Front Stock Shock Conversion...........................................................................................$495.00

Front Dual Rate Spring Kit for Stock Shocks...................................................................$325.00

XC A arms - including the castor bracket.........................................................................$895.00

Core Charge for Upper A arm bolts and sleeves..............................................................$40.00

MX A arms.........................................................................................................................$895.00

170mm Econo Link............................. #09-009.................................................................$175.00

This is the front link - it is an excellent add on for the guy who wants to lower his quad and soften the rear shock with out spending a lot of money. 

Pro Dual Link................................................................#09-011 & ..........................$375.00

This is a dual link and requires a different length shock but offers a better progression and leverage ratio curve vs. the Econo link. If we do your rear shock conversion - we modify your rear shock to accept this link. Please note: This link will not work with a stock rear shock that has not been modified by us. It will only be sold to existing customers who already have our shock conversion or as part of one of our shock conversions.

Engine

Piston Kit...............................................................................................................................$235.00

This is a custom made piston from Wiseco that gives good combustion action without having a high compression ratio - it runs much cooler then many of the high compression pistons available for the quad. It is the same piston that the Yamaha's Factory riders were using in 2010 these riders included  Thomas Brown, Bill Ballance, Donnie Ockerman, and Brandon Sommers, Taylor Kiser, and Walker Fowler. This Piston is available in both 95 and 96mm.

Camshafts..............................................................................................................................$425.00

These cams have the most average power of any cams I have tested. If you racing on the dyno only - dont buy these - they do not have as much peak power as a few others.

Power Commander (basic)...................................................................................................$349.95

This comes with a custom modified fuel curve for racing. This comes programmed for your quad. I need to know what exhaust, with or without air box lid, what cams, what piston, what type of riding, what altitude, and what fuel you are running.

Engine packages:

XC Basic - Includes Intake cam, porting, gaskets, piston, and rings...............................$995.00

XC Pro - Includes Cams, porting, gaskets, piston, rings, top end labor, and cylinder machining. Note: This is only sold as a kit and must be used with a PE3 ECU .........................................$1995.00

MX Basic - Includes cams, porting, piston, rings, top end gaskets, top end labor, and cylinder machining. Note: This is only sold as a kit and must be run with a PE3 ECU ..................$3500.00

MX Pro - Includes Cams, porting, larger valves, piston, rings, cylinder machining, valve springs, gaskets, custom gear treatment, piston and head ceramic coatings, and top end labor. Note: This is only sold as a kit and must be run with a PE3 ECU..............................................................................$5350.00

Carb Conversion Kit - What you need to supply to me - 08 Carb, 2010 top engine mount, 08 wire harness, 2010 wire harness, 2010 flywheel, 08 Fan sensor (goes in radiator), and a 08 coil. What I give you - Modified harness, modified carb, modified engine mount, Dyna CDI, modified flywheel, radiator sensor adapter, fuel pump block off plate, fuel petcock for fuel tank, Carb cable (to fit honda thumb throtle), 08 intake boot.................................................................................................$1500.00