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Four-Stroke Yamaha Technical Information

Crockett's BK Mod - This modification is intended to limit the fuel squirt from the carburetor accelerator pump into the engine for an increase in performance and fuel efficiency. By Rob Crockett

Differences Between the 2003 Yamaha YZ450F & WR450F - Which bike is right for you. This is a table showing all the differences between the 2003 Yamaha YZ450F and WR450F. By 4Strokes.com

Exhaust Noise Test Data (84KB PDF file) - This PDF file contains exhaust noise level (dB) ratings for different model Yamaha dirt bikes with various aftermarket exhaust systems. Please go to the California State Parks Off-Highway Motor Vehicle Recreation Division Website for the latest edition. Submitted by John Franger

Installing Lights on the Yamaha TT-R125L - The Yamaha TT-R125, TT-R125L and TT-R125LE do not come with lights and some do not even come with wound stator coils to power lights. By Tom Rogers

Measurement of Exhaust Sound Levels of Motorcycles (40KB PDF file) - This SAE Standard establishes the test procedure, environment, and instrumentation for determining the sound levels of motorcycles under stationary conditions. By SAE Motorcycle Committee

TT500 Wiring Diagram (Dual Sport Lighting) (70KB GIF Image) - By Jeff Moon

Yamaha Mini Four-Stroke (to 110cc) Powertrain & Drivetrain Related Specs - By 4Strokes.com Forums members

Links to Four-Stroke Yamaha Technical Information on the Internet

	2001 Yamaha WR426F Tips & Tricks - By Mike Hobbs
	2003 to 2004 WR450F Starter Retrofit Mod - By Dan Djokovic
	Build Your Own CDI Unit for the XT600 - By transmic
	Make Your Own XT225 (Serow) Chain Guard / Guide ( Download Template Here) - By XT225 Serow Riders
	Project Supermoto (YZ450F) - By Lance Oliver and Bill Andrews of AMA
	Project WR450F - Making It Run Right - By Mike Hobbs

	WR450F Airbox Mod - By Dan Djokovic
	XT225 (Serow): Carburetor Assembly Diagram \| Clutch Assembly Diagram \| Electrical Circuit Diagrams / Schematics \| Gear Lever Adjustment \| Head Assembly Diagram \| Model Info \| Parts Fiche \| Starter Motor Diagram - By XT225 Serow Riders
	Yamaha Model Identification Codes - By Jeff's Cycle
	Various Yamaha Tech Articles - By Garrett Berg
	YZF Auto Decomp E-cam Installation - By Alan Vinh

Do you know of any Yamaha four-stroke technical related article links? Contact us and let us know. Thanks!