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2000 WR400F Rebuild - Process Pictures.


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I rebuilt my friends 01 WR250 earlier this year. It was a bear to start the first day as well. I kicked until my foot hurt. We ended up pushing it to get it started (hold the clutch and decomp lever, dump clutch, dump decomp). Starts after 1-2 kicks now that it's broken in.

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I rebuilt my friends 01 WR250 earlier this year. It was a bear to start the first day as well. I kicked until my foot hurt. We ended up pushing it to get it started (hold the clutch and decomp lever, dump clutch, dump decomp). Starts after 1-2 kicks now that it's broken in.

Ya it was a tiring day of kicking. Going to test for spark today and put the carb back to stock settings and see if that will do it. A buddy of mine said that since it was dry for so long, that may be reasoning as well...

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Does anyone know the stock settings for air/fuel screw and for the idle knob?
Try about 2 turns out to start with. If you have to go more than 3 to 3 1/2 you need a bigger pilot jet. Did you open the carb drain screw to make sure the bowl filled up?
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I don't have anything to offer, except to let you know that I'm pulling for ya'.

Good Luck man, I know you've worked your butt off on this bike, so I hope you don't have to mess around with it too much before it decides to start up.

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I just started my 1998 WR400 after a piston and ring replacement. The bike was bought in pieces so, it has been some time since it ran. When I went to start it I gave it a couple of throttle twists to prime the carb and pulled the choke out. It would not start so, I held the decomp lever and "cleaned out" the cylinder for a few kicks. Still no good but it tried so I pushed the choke in. Still no luck so, I held the decomp lever and "cleaned out" the cylinder again and used the hot start. It started on the first kick. 100+ degrees and high humidity at 8:00pm in Memphis made the bike "think" it was too hot I guess. ? I hope this helps.

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I just started my 1998 WR400 after a piston and ring replacement. The bike was bought in pieces so, it has been some time since it ran. When I went to start it I gave it a couple of throttle twists to prime the carb and pulled the choke out. It would not start so, I held the decomp lever and "cleaned out" the cylinder for a few kicks. Still no good but it tried so I pushed the choke in. Still no luck so, I held the decomp lever and "cleaned out" the cylinder again and used the hot start. It started on the first kick. 100+ degrees and high humidity at 8:00pm in Memphis made the bike "think" it was too hot I guess. ? I hope this helps.

Good information. I haven't tried the hot start yet. I am open to any ideas as of this point so that will be the next attempt! Thanks bud!

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I don't have anything to offer, except to let you know that I'm pulling for ya'.

Good Luck man, I know you've worked your butt off on this bike, so I hope you don't have to mess around with it too much before it decides to start up.

Thanks for the support man. I've got a great chick and friends that have been there for me through this and it's been a fuel for the fire.

Fingers back to being crossed...

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What are the hints for the hill trial?

Dump Clutch or Clutch and decomp at the same time?

When I bump start my 426, I always put the bike in third or fourth gear and just dump the clutch after getting it rolling along at a pretty good clip downhill. Any lower gear, and the rear tire will just slide. If you try it and the tire slides, try a higher gear. I've never tried to bump start mine on asphalt though, only dirt, so that might make a difference as well. Good luck.

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