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Honda MX & Off-Road Dirt Bikes
hard starting o1 xr400
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[QUOTE="DualSportr, post: 168154, member: 19592"] Basic thumper starting procedure - for ALL four strokes. This is from many different sources - and as a short person, I can attest to its ability to work on everything from an XR250 to a YZF 426. Cold starts: 1. Choke on 2. Fuel on 3. Bike in neutral, do not pull in the clutch 4. Pull in the decompressor lever and crack throttle wide open. Do not let off on the throttle - hold it completely wide open (this raises the slide and allows air into the head). 5. With the decompression lever and throttle held on - kick the bike 10 times. Just like you're priming a pump (that's what you're doing). 6. Let go of the decompressor lever - let go of the throttle. 7. Take your throttle hand OFF the throttle - grab the crossbar (you may not think you'll gas it, but everyone does, we just don't realize it!). 8. Slowly kick the bike through and feel for the point where the kicker wants to stop (like you'd have to apply some muscle to continue to kick it through). there are a few points that feel like this, the hardest point is Top Dead Center (this is the one you want!). Stop there. 9. Pull in the decompression lever, this will allow you to gently rotate the piston just past top. You will just move your foot on the kicker maybe 1inch or slightly more. If it's quiet, you can hear a little "thup". The piston is now just past the top of the stroke and is ready to be kicked. 11. Let loose of the decomp lever. Allow the kicker to come back to the top of the stroke. 10. Kick the bike. An efficient four stroke kick requires smooth, consistent action - it doesn't necissarily have to be fast or hard, just smooth. Make sure you use a complete kick - all the way through from the very top of the stroke to the very bottom. The bike should start. If it doesn't, just follow the procedure from #8 onwards. Don't give it any throttle until it fires off. HOT STARTS Use the same technique as above (without the choke) if you crash the bike or if it's gotten very hot and doesn't want to start. REGULAR STARTS (after warmup) Use the procedure from #8 onwards. ALWAYS use the decompressor to get the piston just past top dead center whenever you start the bike. It's faster and easier on the bike (and the rider :) If it's really cold out, or if you haven't started the bike in awhile (weeks) - use the "lay the bike over" technique mentioned above. Lay the bike on its side until fuel flows out the overflow tubes (coming out of the carb). This will give the carb a nice full charge of fresh fuel. I am 5'4". I'm a wimp. I've used this technique to start everything from XR200's to bored and stroked YZF 426's. It really does work. BTW, every bike has it's own "best" starting procedure - at some point, you will find that your XR4 may want a tiny bit of throttle just as you're kicking it and it starts easier. Some do, some don't. Experiment with it :) Happy Trails! [/QUOTE]
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Dirt Bike Discussions By Brand
Honda MX & Off-Road Dirt Bikes
hard starting o1 xr400
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