For the do-it-yourselfer... Here are excellent step-by-step detailed instructions, plus photographs, diagrams and video illustrations for everything from basic ATV maintenance tips to major off road repairs and modifications for ATVers. Use these tech tips to learn from others who've been there, done that!
Chassis and Frame TipsHow to know when you have a chassis problem, what to do if your quad is pulling to one side, how to prolong the life of your chassis and bearings, what to do about rust, what to do about bent or cracked parts, how to protect the undercarriage, and more.
Choke Removal To get an increase in throttle response, you might be interested in this 400ex Choke Removal.
Drivetrain TipsHow to protect your axle lock nuts, when to replace rear axle bearings, how much free play you should have in your chain, and more.
Engine & Transmission TipsHow to adjust your own valves, the best type of oil and air filters to use, how to rebuild a 2-stroke motor, how to get more power from your motor, how to "true" a crankshaft, start your ATV, how 2-strokes really work, what to do when your clutch doesn't engage properly, and more.
Exhaust & Fuel TipsQuestions and answers about how to properly adjust your carburetor, the DG Exhaust, how to keep your exhaust tuned, and more.
How 2-Stroke Engines WorkLearn about two-stroke basics, the two-stroke cycle, sparks fly, fuel intake, the compression stroke, disadvantages of the two-stroke, and lots more.
How To Jet Your CarbSome examples of how you can change your jetting for better performance, and in some cases increased engine life.
Quad Service TipsGREAT tips like: adjusting a carb air/fuel mixture screw, changing the rear bearing on a Honda, changing Grizzly 660 clutch weights, valve adjusting, rubicon reset procedure, retrieving service codes, adjusting valve clearance, how to wire the fan, adjusting the throttle cable, spark plug info, carb stuff, high lifter rubicon fender kit instructions, how to clean & adjust front and rear drums.
Snorkel - Custom MadeHere's a list of everything you'll need to do the job yourself, as well as excellent photos of the snorkel on an ATV.
Spark Plug Color ChartReading spark plugs can be a valuable tuning aid. Here are some tips on how to read spark plug colors.
Suspension & Steering TipsHow to tune your suspension, what to do if you have "mushy" front shocks, what to do if your quad pulls to the side, and more.
Tires, Wheels & Brake TipsHow to choose the correct brake shoes, reline your brake pads, info about Yamaha Blaster Hydraulic Brakes, how to replace tires, what to consider when buying new tires and wheels.
Two Stroke Motor ExplanationThe two-stroke cycle can be difficult for some to visualize at first because certain phases of the cycle occur simultaneously, causing it to be hard to tell when one part of the cycle ends and another begins.
Wheel OffsetsThere are 3 common front offsets for your 400ex. They are 2:3, 3:2, and 4:1. What these numbers mean is the measurment of the rims. Here are some tips for understanding wheel offsets.
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