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Thread: 2002 400 EXC - Recommended Mods?

  1. #1
    Join Date
    Oct 2002
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    Marlton, NJ
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    2002 400 EXC - Recommended Mods?

    I just purchased a 2002 400 EXC. The bike is being delived next week. This is my first KTM and the first bike I have owned in the past 10 years. I have seen a lot of recomended mods out there but have not been able to put a real solid list together. I plan on running some enduros, harescrambles, a few duel sport events, and of course lots of trail riding. Remember its been 10 years since I have been riding so what you might think is a basic tip and not worth mentioning will probably be new to me. Can you guys (and girls) please help me out? What mods do you reccomend to a stock 2002 400 EXC?
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  2. #2
    Join Date
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    First and foremost: Trash those stock tires and get a set of Michelins on there; 140 X 18 S-12 on rear, M-12 on front. Second, and very critical: set your sag to 95 mm (laden) in the rear. It will sharpen the turning significantly. Third, raise the forks to 10mm above the clamps. Aluminum handguards are a must; save your levers and your hands. Skid plate's a good idea if you ride in rocks at all. Get a gripper seat and save your stock cover for resale; they self-destruct shortly anyway. I don't run rotor guards and have never damaged a rotor. Stock jetting is OK, but vast improvements are possible. Try an OCEMN needle, fifth position, and a 170 main. Get the P-38 modification for the carb, or modify the accelerator pump yourself for a one-second squirt. Consider pipe guard and muffler guard to protect those pretty pipes. I would try to swap your E/XC muffler for an SX muffler, then install a promotobillet end cap spark arrestor--lots more punch and response with this setup. A steering damper is pretty nice to have as well; saved my scraggly butt many a time.
    "Again with the squeaky shoes."

    '05 Gas Gas 300DE
    '02 KTM 400SX/EXC
    '02 KTM 400 SX
    '75 Yamaha TY175
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