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MX, SX & Off-Road Discussions
Dirt Bike Mods & Maintenance
trying to start a neglected xr
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[QUOTE="RidesRed, post: 726904, member: 49541"] First, be sure the tank is clean and rust/sediment free. Then carefully remove the petcock, and clean the screen inside it. remove the tank to get good access to the top of the motor. Clean the area around the spark plug thoroughly.Pull the spark plug, and squirt some penetrating oil in there to help those bone-dry rings. With the plug still out, slowly rotate the motor with the kickstarter to get the rings lubed up. Replace with a fresh plug, change that old, acidic oil (it WILL etch the bearings, rings, etc. if ya start it with that old oil). Clean the carb THOUROUGHLY. This may be more involved than you think. Be sure to remove the jets, air bleeds, emulsion tubes, etc. Use a tip cleaner (for welding tips) to get the stubborn stuff out. Spray every single air and fuel hole there is and ensure they are clean. Be CERTAIN to service the airfilter. If a points ignition, new points and condensor. It also wont hurt to drain the old fork oil, and refill the fork tubes with fresh stuff. Finally, be sure to adjust the valves to factory specs, and set the timing chain tension to factory specs. xr100s required .020" cold, I&E. This is important if you want a smooth running, easy starting "one kick wonder". I have four old honda's. An '81 xr100, a '71 sl-70, a '70 ct-90, and a '69 mini trail 50. They all start on the first kick, and they are ALL on the original rings! Good luck. [/QUOTE]
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MX, SX & Off-Road Discussions
Dirt Bike Mods & Maintenance
trying to start a neglected xr
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