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4Strokes.com Technical: Non-Model Specific

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4-Stroke Jetting Tricks4-Stroke Carb Jetting Tricks - A 4-stroke engine is basically an air pump and the carb meters how much air and fuel goes in. By Chris
Airbox Mod Airbox Mod - I noticed a crisper throttle response and the engine seemed to rev faster. By ThumperTD
Baja Designs Dual Sport Lighting Kit SchematicBaja Designs Dual Sport Lighting Schematic Baja Designs Dual Sport Lighting Schematic (70KB gif) and Wiring Diagram Wiring Diagram (60KB gif). By Jeff Moon
Basic Dirt Bike OverhaulBasic Dirt Bike Overhaul - Do this to your bike and be happy all year long. I charge pro racers big bucks for this and they keep coming back! By NOS
Floor Jack Bike Lift Plate Bike Lift, Floor Jack Plate - A custom plate built for a common floor jack to convert it to a hydraulic bike lift. By Edward McCafferty
Bike Mounted Tire IronsBike Mounted Tire Irons - I drilled holes in my tire irons and bolted them on the frame of my XR650L where the buddy pegs were. By MarkN
California Motorcycle RequirementsAdobe Acrobat PDF file Califoria Motorcycle Requirements (2.2MB PDF file) - CA Highway Patrol official document listing complete motorcycle codes.
Carburetor JettingCarburetor Jetting - Carb jetting can be easily understood if we understand the basic principles of carb and engine operation. Magazine Reprint
Carburetor Overview (Keihin)Carb Overview (Keihin) - The carb on your bike should perform suitably with the standard recommended settings under average load, climatic, and barometric conditions. By 4Strokes.com
Chain Guard Flap Chain Guard Flap Chain Guard Flap - Keep chain lube off your wife's back! By HorseRider650
Conversion of Dirt Bikes for Street or Dual Sport UseConverting Dirt Bikes for Street or Dual-Sport Use (Topic in the Forums)
Crankcase Breather ModCrankcase Breather Mod - This case or crankcase breather mod can be done on any bike to allow the crankcase to breath better. By superhondaz50
Dirt Bike Horsepower CalculatorDirt Bike Horsepower Calculator - Calculate the approximate HP of a dirt bike if you know the bike and rider weight and ¼-mile time.
Dirt Bike Tire SizingDirt Bike Tire Sizing - Most dirt bike tires have numbers that indicate the tire width, aspect ration (height) and rim diameter.
Do-It-Yourself Dual Sport / Supermotard HelmetDIY Dual Sport / Motard Helmet - Build your own Supermoto / Dual Sport helmet. By David Closs & The Morton's
Do-It-Yourself Dual Sport KitDIY 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 Frame GuardsDIY Frame Guards - Homemade aluminum frame guards for about $5 a set. By mpigg
Dual Sport Requirements Per StateDual Sport Requirements Per State Dual Sport Requirements Per State 6/07 - Minimum requirements for dual sport motorcycles in the US. 6/06 Ver, 7/98 Ver
Motorcycle Exhaust Header Wrap Exhaust Header Wrap - Keep exhaust temps confined. By Ygrumyz
Emergency Cable FixEmergency Cable Fix - A way to fix a cable if the end pulls off and you are miles away from civilization. By Randy Ressell
Exhaust dB ReducerExhaust dB Reducer - This may also work for other aftermarket exhaust systems to reduce noise level. By Ken
Fault Finding Flow Chart for Motorcycle Charging SystemsAdobe Acrobat PDF file Fault Finding Chart for Charging Systems (88KB PDF file) - The most common fault in electrical systems is a bad connection. By Electrex
Fixing a Cracked or Broken CaseFixing a Cracked or Broken Case - The price of a new case can be horribly expensive and in most cases it can be fixed for a fraction of the cost. By Brian10
Adding Fork OilFork Oil Adjustment - Drain the forks and then accurately set the initial oil level. Don't be afraid, it's really quite simple! By Michael Hetrick
Dirt Bike Headlight Protectors/GuardsDirt Bike Headlight Protectors / Guards - Build an inexpensive headlight protector or guard for your dirt bike. By various individuals
Garage Door Opener for a Dual SportGarage Door Opener for a Dual Sport - Integrate your spare garage door opener on your dual sport. By Jlutty650L
Gear Ratio ChartAdobe Acrobat PDF file Gear Ratio Chart (13KB PDF file) - Countershaft and rear sprocket gear ratios. By 4Strokes.com
Gearing CalculatorMS Excel File Gearing Calculator (42KB Excel file) - Calculate speeds (MPH & KPH) for primary and final (trans & sprockets) gearing, wheel size, and RPM. By Chris Helberg
Homemade Lower Fork ProtectorsHomemade Lower Fork Protectors - Make your own PVC lower fork leg protectors. They're easy to make, cost less than a pack of smokes, and snap right on the fork legs. By New Old Stuff
How To Change Dirt Bike TiresHow To Change Dirt Bike Tires - Are you have trouble changing your tires? This is how some folks from our forums remove and replace their own tires. By forum members
How to Read Your Spark PlugHow To Read Your Spark Plug - Here's how to check your jetting by reading the plug. Includes NGK part numbering PDF file. By 4Strokes.com
Setup Disc Exhaust SystemsAdobe PDF file How To Set Up a Disc Type Exhaust System - Although meant for the XR600R and XR650L with a White Brothers E-series exhaust, this may help with setup of other disc type exhausts. By WB
Make Your Own Frame GuardsMake Your Own Frame Guards - They are much cheaper than factory or aftermarket metal frame guards. By Anthony Loh
Measurement of Exhaust Sound Levels of MotorcyclesAdobe PDF file Motorcycle Exhaust Sound Measurement (40KB PDF file) - SAE Standard for test procedure, environment and instrumentation for determining exhaust sound levels. By SAE Mc Committee
Dirt Bike StorageMotorcycle Storage Procedures - Items of a motorcycle that should be addressed before putting it up for winter or long-term storage. By Robb Nelson
Oil Drain FunnelOil Drain Funnel - Why pay $20 for a special funnel when you can make your own for less than $2? By KingTutt
Painting Vinyl SeatsPainting Vinyl Seats - Are you tired of that old faded seat? Do you have a late 80's KLR with a color scheme designed by Kawasaki's watercraft department? By Dale Wagler
Plastic Restoration (via Painting)Plastic Restoration (via Painting) - It's no secret that dirt bike plastic fades and tanks yellow and lose decals as they age. After good advice, this is what I've found works well. By Edward Pinzel
Rear Fender BagRear Fender Bag - Here is an inexpensive rear fender bag for dirt bikes that do not have a rear luggage rack. By Jlutty650L
Registration Decal SaverRegistration Decal Saver - No more destroyed registration stickers when you remove your fork legs for service! (may or may not be legal) By 4Strokes.com
Rim Lock / Bead Lock / Bead Stopper InstallationRim Lock / Bead Lock / Bead Stopper Installation - If you switched from Dual Sport type tires to full knobbies, chances are you will need to install a rim lock. By 4Strokes.com
Seat Cover & Graphics InstallationSeat Cover & Graphics Installation - Sooner or later the graphics on your thumper are going to start looking ratty. By 4Strokes.com
Side Panel SkidsSide Panel Skids - Teflon rods cut in half lengthwise then attached to the side panels with counter-sunk bolts. By motomonte
Spring Preload, Race Sag & Suspension AdjustmentsSpring Preload, Race Sag & Suspension Adjustments - Setting the proper race sag is important for competition use. By 4Strokes.com
Testing for a Suspected CDI ProblemTesting for a Suspected CDI Problem - The first thing to do is to look at all the wires in the electrical system and make sure the insulation is not worn through... By qadsan
Thumper Starting ProcedureThumper Starting Procedure - If the engine is cold it may help to turn the idle screw up slightly to aid in warm-up and give the engine a little extra fuel. By 4Strokes.com
Tire Removal & InstallationTire Removal & Installation - 1. Set rear wheel sprocket side down and front wheel brake side up. 2. Remove valve core and loosen rim locks. By 4Strokes.com
TopSpeed V2.1Zipped file TopSpeed V2.1 (151KB ZIP file) - TopSpeed Calculator by KAMware. Calculates for the following parameters: engine, gearing, exhaust, cam lobe center, and horsepower.
Understanding Your SuspensionUnderstanding Your Suspension - There are a few basic forces at work in suspensions that must be understood before making successful changes. By NOS
Non-Model Specific Subcategories: Technical Info | Tips | Links
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