WR400's been sitting for a while...help
Posted September 26, 2010 - 08:05 AM
I just got back into ridding and my 2000 WR400's been sitting for a while. I drained the tank/carb and put new gas in, changed the oil, and finally kicked it over w/choke on. The idle was exceptionally high with the choke on but after it was warm i took the choke off and it sputtered and died? This continued to happen which doesnt make sense b/c about a year ago it ran perfectly. Has anyone run in this or have any idea what to do? I really want to avoid taking it to a shop....
Thanks for all the help
Posted September 26, 2010 - 09:07 AM
Posted September 26, 2010 - 09:42 AM
The thing is, if you change your pilot and that works, chances are the old pilot was gunked up as suspected. However if the pilot is gunked up then the rest of the carb is also likely gunked up and you’ll then have a bike that idles but doesn’t run right in the rest of the throttle range. Sometimes carb cleaner doesn’t get all of the gunk and you’ll need new jets anyway; if so you may as well get them all. Just try cleaning first. Remember, clean is king – always…well, except for the actual riding part – and mud wrestling.
Posted September 26, 2010 - 02:15 PM
When you remove the cap on the bottom, if it is spunky, you will want to pull the carb and clean it, if it is clean, then just the pilot is what you need.
For the $5 a pilot costs, cleaning is not worth it. Once removed, you can dunk your old jet in some super solvent for a year and hope it comes out surgically clean and try it the next time it happens
Posted September 26, 2010 - 02:59 PM
Posted September 27, 2010 - 06:49 AM
The bottom line is that if the pilot is gunked up then more than likely the rest of the jets are also [and they are all too small]. You can clean the pilot enough most of the time to see if that may be the problem and you don’t have to drive out the a shop or wait for a part to come in. I just did everything suggested in my previous post for a 426 that had been sitting for over a year. While you’re right there at the disassembled bike, clean it up, check everything, see if it runs. After checking everything you can then go to the shop and get everything you need at once, i.e. new jets, boots, fuel line or what ever – easy.
Posted September 27, 2010 - 07:22 AM
Sorry for the boomerang. Good luck with it.
Posted September 27, 2010 - 02:32 PM
This will be my first time tearing the carb apart so im a bit nervous but hopefully a good cleaning/once over will reveal the culprit. I have a shop manual and a bit of experiance so hopefully all goes well. wish me luck.........
Posted September 27, 2010 - 04:00 PM
I would suggest stuffing a clean paper towel in the intake once you get the carb off to keep anything from getting in there [bugs love all open holes on motorcycles]. Other than that just make sure you work in a nice clean area and keep everything sparkling when you put it all back together.
Oh yea; careful twisting the throttle assembly once the carbs off. It’ll shoot a good squirt out even after you’ve emptied the bowl. Point it to some pavement or into a jar or something. Watch your eyes:cry:. Most manuals don’t mention this. I’m just sayin.