wr250f 2006 starts to missfire after getting wet

benmapplebeck · **Joined:** Tue Nov 03, 2009 8:46 pm **Posts:** 26

Hi all can any one help i seem to have a problem with my wr250f missfiring it runs fine until i do any light river crossings or big puddles etc then for a good while after that the bike will start to miss fire has anyone had this problem or know where would be good to check for possible problems?

AdamA · **Posted:** Sun Jan 31, 2010 8:58 pm

Are your breather hoses all routed down to the underside of the bike?
Water can get sucked up them. Try re routing to the air box to keep them out of the water.
Not sure of the setup on the WR (as I have been avoiding the garage cos I can't ride it) but on KTMs the plug cap rubber degrades and lets water past the seal into the plug well which causes similar symptoms.

andymac · **Posted:** Sun Jan 31, 2010 9:52 pm

lashings of wd40 before you go out

dirtyboy · **Joined:** Wed Dec 30, 2009 8:14 pm **Posts:** 14

try a supreser cap off a jet ski other than that like the man says plenty of wd40

marklockie · **Posted:** Sun Jan 31, 2010 11:54 pm

The WR runs an intergral coil / cap (ie the spark plug cap is the coil) very unusual to get water into that type but they do go faulty. How do you stop the misfire? Does it dry out on its own? Check air filter /air box could be getting water into carb, if thats ok and it does dry out on its own check electrical bits like kill / starter button wires to coil, if there's nothing obvious a good way of locating fault is run bike and using water sprayer (gardners type) or hose pipe spray individual parts on the bike to try and recreate misfire, then investigate. Enjoy

benmapplebeck · **Joined:** Tue Nov 03, 2009 8:46 pm **Posts:** 26

Thanks for the replies guys, the problem stops by itself usually a few hours later or if not by the time i use it the following weekend its fine again.

benmapplebeck · **Joined:** Tue Nov 03, 2009 8:46 pm **Posts:** 26

anyone got any good tips for keeping these babies water tight i apart from wd-40 everything?

marklockie · **Posted:** Tue Feb 02, 2010 11:53 am

Find the fault and fix it, they are pretty watertight as standard. Have seen many WR's up to the seat in water with no problems. Except this one of coarse :lol:

http://www.youtube.com/watch?v=cDcW2e3butE

KentWR · **Posted:** Sat Feb 27, 2010 9:50 am

Its probaly getting water on the connector which goes to the stop of the spark plug cap. There are two little connectors in there. They do get wet. Maybe silicone around the edges or somthing?

Worth a try.

benmapplebeck · **Joined:** Tue Nov 03, 2009 8:46 pm **Posts:** 26

just silicone sprayed up today everywhere so will try it out tomorrow

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wr250f 2006 starts to missfire after getting wet

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