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

Honda Specific Subcategories: Technical Info | Tips | Links

10 Tips for the XR600R from Scott Summers - Here's what Scott Summers and Fred Bramblett do to their XR600R's to make them more competitive.

1993-2000 Honda XR650L Esthetic Changes - Seat, fuel tank and frame logos, etc. By xr250rguy

A Cooling Fan For Your XR650R (178KB PDF) - How to add a computer style fan to your XR650R. By Andy Waddell A Bracket Drawing by Jim Rowley. Cooling fan for the XL600R.

Airbox Mod (XR400R) - I noticed a much crisper throttle response, the engine seemed to rev faster than before. By ThumperTDC

Airbox Mod (XR650R) - A very popular air-box modification for the XR650R. By qadsan

Carb Adjustments & Tuning (XR400R Keihin 36mm) - As delivered, with exhaust diffuser and noise suppressor, your XR may be jetted rich for your riding needs. By 4Strokes.com

Cheap XR100R Mods - After reading 4Strokes.com I decided to volunteer mods I did on my 6yr old son's 00 XR100R. The cost was about $10 and that was just for new jetting. By Greg Kipp

Clarke 4.7 Gallon Gas Tank Stabilizer - An easy 30-minute job, and the tank will be rock solid afterwards. By forum members

XR650L to CRF450 Rear Fender Swap - Install a Polisport CRF450 rear fender and tail light on the XR650L. By Simapg

How to fit a CRF450R/X clutch perch to an XR400R

CRF450R/X clutch/hot start perch on an XR400R - Adapt a CRF450 perch on an XR400R. By Brad Poulter

CRF450X (2005) Wiring Diagram (60K GIF image)

Dave's XR650L Carb Mods (Forums) - XR650L carburetor mods by Dave Closs.

Decompression System Adjustment - An automatic decompression system is interlocked with the cam to make starting easier. By 4Strokes.com

DIY Dual Sport Kit - I'm so glad I didn't buy a dual sport kit because I did it myself for a fraction of the cost. By Stu

DIY Keyed Ignition Switch (Forums) - Install a keyed ignition switch on a dirt bike that did not already have one. Topic by b_king

DIY Smog Block-Off for the XR650L - I just purchased a 2003 Honda XR650L and so begins the uncorking process. By Kyle Swanson

Exhaust Noise Test Data (101KB PDF) - Exhaust dB levels for Honda dirt bikes with various aftermarket exhaust systems. Go to CA St Parks OHMV Rec Div Website for latest edition. By John Franger

Honda Mini 4-Stroke (to 110cc) Powertrain & Drivetrain Related Specs (Forums) - By Forums members

Gordon Mods (for the XR400R) - After carefully examining the stock baffle, and running some flow numbers for the different areas involved... By Gordon Banks

Honda Wiring Color Key (Forums)

Honda VIN Codes, How to Read (Forums)

PDF - How To Set Up a Disc Type Exhaust System

How To Set Up a Disc Type Exhaust System - Intended for 85-87 & 91-98 XR600R and 93-98 XR650L with a WB E-series exhaust system. May be helpful for other disc systems too. By White Bros

Installing Lights on the XR200R - Shed some light on your XR200R with this article. By 4Strokes.com

Intake Air-Box Snorkel Removal - Uncork your XR for some new-found power! By 4Strokes.com

Inverted Fork on XR400R - Complete upside down fork modification with Race Tech Gold Valves on an XR400R. By ThumperTDC

Joe's XR400R Hop-Ups - I've owned my XR for nearly 4 years now, and still after all this time I'm not ready to part with it just yet. By Joe Sexton

Lever Pivot Bolt & Boot - A clean mod when you remove stock hand guards and replace with bar mounted style. By 4Strokes.com

XR / XL Spring Rates per Rider's Weight - Is your Honda XR or XL fork and shock sprung correctly for your weight?

Measurement of Exhaust Sound Levels of Motorcycles

PDF - Measurement of Exhaust Sound Levels of Motorcycles

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

Modifying the XR250L - Have you noticed how heavy the XR250L is in stock trim, or its lack of acceleration? By Rick Ramsey

Oil Drain Funnel - Why pay $20 for a special funnel when you can make your own for less than $2? By KingTutt

Pics of XR400R Engine Work - This pic was taken after porting the head. By ThumperTDC

Rear Fender Bag - Here's an inexpensive rear fender bag for bikes without a luggage rack. By Jlutty650L

Setting Valves on the XR600R - Adjust valves on the compression stroke. By Craig Cullen

Side Panel Skids - Teflon rods cut in half and attached to the side panels. By motomonte

Excel File - Speed vs RPM Calculator for the XR400R

Speed vs RPM Calculator for the XR400R (31KB Excel file) - Calculate speed vs RPM for various tire and sprocket sizes. By Bob Bendt

Stuart's XR200 Hop-Up's! - I bought an XR200 new in 83 as a 2nd bike. This was the last good year before the weird engine in 84-85. By Stuart Watson

Uncork the XR650R - Uncork the BRP for higher performance using all factory parts (Honda Tech Bulletin).

Uncorking the Honda XR650R BRP By Bob Naumann

Uncorking the Honda XR650R Big Red Pig - This is how Bob uncorked his 2000 Honda XR650R Big Red Pig. By Bob Naumann

Wally's XR200R Hop-Ups! - The most impressive mod was adapting the KX front-end. By Wally King

XR200R Front Suspension Mod - Here's what I did to get the best front suspension I've ever had with dampening-rod type forks. By NOS

XR200R / XR250R (84) Wiring Diagram - By Jared (Jayrod1318)

XR200R / XR250R (1984-1985) CDI Wiring Color Code

XR200R / XR250R (84-85 & On) CDI Wiring Color Code - By Jared (Jayrod1318)

XR200R / XR250R (1984-1985 & On) CDI Testing Table

XR200R / XR250R (84-85 & On) CDI Testing Table - By Jared (Jayrod1318)

XR250R (96-99) Wiring Diagram (78KB GIF Image) - By Brian Sutherland

Tips & Tricks For The XR250R/L - This article is based on the Australian model 97 XR250R/L but may also be beneficial for others. By Daniel Stebbeings

XR250R Exhaust Mod - Wedge a screwdriver in the hole in the end-cap where the screw was. By Stuart Moss

XR250R Lowering Link, Make Your Own (Forums) - XR250R lowering link dimensions. Posted by Stu

XR250L ('91-'96) Wiring Diagram - Page 1 (57KB GIF), Page 2 (46KB GIF) - Submitted by Ian (marshman)

XR400R Brake Light - Add a brake light to the Honda XR400R.

XR400R Engine Oil Checking & Changing - (Manual republish) Probably the most requested info.

XR400R Fork Valve Stack Compression Mod (Forums) - High speed compression (riding over rocks) was much improved. By Trailryder42

XR400R Custom Front Number-Plate - Cycra CRF450R half-vented front number-plate in place of the stock headlight/number-plate. By kountryboy

XR400R Mods / Setup (Early XR400R Mod Database)

XR400R Mods & Setup - This mod and setup info is related to the 96, 97 and 98 Honda XR400R.

XR400R Exhaust Comparison - HP and Torque figures for stock and aftermarket mufflers for the Honda XR400R. By Jack Jensen

XR400R Passenger Pegs - Adapt XR650L passenger pegs to the XR400R. By Robb Nelson

Honda XR400R Stator Upgrade - By Robb (b_king)

XR400R Stator Upgrade - I opted for a new 200w unit. I wanted more power for dual headlights and possibly other accessories in the future. By Robb N.

XR400R Wiring Diagram - 96-04 XR400R electrical wiring diagram / schematic.

XR500R Replacement CDI - Rewire a 93-00 XR600R CDI to use in a mid 80's XR500R. By Greasser

XR600R Dual Sport Project - I've been wanting to build a custom dual sport for years. By Tom Niemela

XR600R (88-90) Wiring Diagram (66K GIF image)

XR600R (91-93) Wiring Diagram (70K GIF Image)

XR600R & XR650L Exhaust Baffle Mod - Replace the stock XR600R or XR650L exhaust baffle with a larger ATC 250R baffle. By kubiak

XR650L Battery Relocation - Battery relocation mod for the XR650L. By cracked junior

XR650L Carb Mods - Mods for the 42.5mm diaphragm-type CV Keihin carb. By Dave Closs & Brian Jackson

XR650L Electrical / Battery Relocation - I took off the whole rubber box thing where it was all housed. I trashed the bracket and built a different one. By Ryan

XR650L Oil Cooler 1 - Honda OEM XR400R oil cooler installed on an XR650L. Posted by helrich

XR650L Oil Cooler 2 - Lockhart oil cooler grafted into the air scoop of my XR650L. By Rotorcraft

XR650L Simplified Schematic for Safeties - By Dave Closs

XR650L Smog Block-Off Procedure with Pics (Forums) - By Mike Tuttle

XR650L (non-CA model) Smog Removal (Forums) - By ALS650L

XR650L Smog Removal - How to remove the smog system on an XR650L. By Gary Crawford

XR650L Windshield - I modified a $25 auction site KLR smoked windshield to my XR650L. By Jlutty650L

XR650L (93) Wiring Diagram (73K GIF image) - By Tim Hixson

XR650L (93-95) Wiring Diagram (123KB GIF image) - By Tim Hixson

XR650R Race Prep Tips - 1. Check the right foot peg bolts regularly. 2. Be sure the front lower clip on the air filter has adequate tension. By a guest

XR650R Side Panel Grab Hole - The right side panel has an area that can be cut open to access the subframe for lifting the BRP. By 4StroKen

XR650R Stator Rewind - You installed a mega watt halogen headlight only to find the BRP is seriously lacking in the power dept. By Eric Foster

Honda Specific Subcategories: Technical Info | Tips | Links

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