Four-Stroke KTM Dirt Bike, Dual Sport & ATV Tech Info on 4Strokes.com

Clutch Bleeding Procedure (120KB Adobe PDF file) - Dirt and other foreign materials in the clutch system can cause poor performance or failure. Learn how to bleed your clutch the right way. By Magura

Crockett's BK Carb 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

Exhaust Noise Test Data (65KB PDF file) - Exhaust noise level (dB) ratings for different model KTM dirt bikes with various aftermarket exhaust systems. Go to CA State Parks Off-Highway Motor Vehicle Recreation Division Website for the latest edition. Submitted by John Franger

How to set the fork oil level in your KTM - Front suspension performance relies greatly on fork oil quality, viscosity and the amount of oil in each fork leg. By Mike Rosso

KTM RFS Chain Adjustment - If you are used to adjusting your chain by sight or feel and have not done this procedure yet, you are in for a surprise. By Jon Delameter

KTM Racing Four-Stroke Jetting Mods - First and foremost, order a Keihin FCR OCEMN needle. This can be ordered through carburetor supply house. By Jon Delameter

KTM RFS Setup Tricks - This doesn't really take that long to do once you've committed to tearing your bike apart. I sure found a few eyebrow-raisers too, like motor- mount bolts that were finger- tight and near-dry steering head bearings. By Jon Delameter

KTM RFS Valve Adjustment - As a general rule of thumb valves get tighter as they pound into the seats over and over again. By Jon Delameter

KTM VIN Identification - How to read the VIN number on your two- or four-stroke KTM motorcycle. Covers most models from 1975 to 2000. By KTM Sportmotorcycle

KTM RFS Fork: Rebuild, Oil, Seals and Valving

KTM RFS Fork Rebuild & Valving - Lots of KTM owners seem to have experienced problematic fork seals. By Jon Delameter

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

KTM Four-Stroke Technical Tips

Triple Clamp Offset - Most of the 2000-2002 KTM Racing Four-Strokes have a triple clamp with an offset of 14mm. This offset makes the bike turn "slow" and would greatly benefit from an offset more like 18-22mm. By 4Strokes.com

Links to KTM Four-Stroke Technical Information on the Internet

Confused about triple-clamp offset? by Gary Emig
Back-Bleeding Hydraulics Brakes by Kurt Mirtsching
Alert: Brake Failure Recall - 08-09 450XC, 525XC; 09 450SX, 505SX ATVs by CPSC

KTM PDS Shock System by Race Tech
KTM Tips & Tricks (On The Cheap) by John Stichnoth

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