need some help with wr 400
Posted November 10, 2003 - 02:37 PM
Posted November 10, 2003 - 03:03 PM
You have to check: plug, carb cleaning, carb setting, air filter cleaning, fuel line and thank breather.
On my bike i have this kind of problem in every ride for the first quarter of hour (when the engine is still cold)when the plug is fairly used.
Posted November 10, 2003 - 03:18 PM
Posted November 11, 2003 - 09:19 AM
Posted November 11, 2003 - 09:38 AM
Posted November 11, 2003 - 11:19 AM
Posted November 11, 2003 - 11:52 AM
The yz timing is really easy to do and from what I hear adds quite a bit to the wr's performance. A friend of mine just did it and loved it.
Posted November 11, 2003 - 12:50 PM
Posted November 11, 2003 - 02:21 PM
Posted November 11, 2003 - 05:34 PM
Posted November 12, 2003 - 07:09 AM
(its 35 outside)
DING DING DING.... I think you just hit the nail on the head. The older WR's for some reason my 99 yz400 included hate to run in the cold.
Part of the problem is that they take forever to get up to operating temperature. The extra capacity radiators take forever to warm up. As a result the bike will act like it is running rich and will pop like crazy. Try adding a few strips of duct tape over the finned radiator guards to stop some of the air from coming in. This will help the bike warm up faster and stay warm. Fast ridding in cold temps will actually cool the bike off too much and it will start to run like crap.
They can also be a bear to start in the cold temps. That is usually a jetting issue though. Its usually a litle lean in the winter if you havent rejeted. This will cause hard starting. One trick is to lay the bike over on its side untill it drools gas. Then try starting it. It seems to help. Maybe turn the fuel screw out 1/4 turn.
Also run thinner oil in the cold temps. This will help with the starting. When it gets close to freeaing that thick oil dont want to move. Its hard to get the bike to turn over with the oil like sludge. Try a synthetic oil if you dont already.
Posted November 12, 2003 - 07:34 AM
Very close to 1.5 quarts.
how much oil does this thing have in it?