2003 wr450 only runs with choke pulled
Posted September 20, 2009 - 04:27 AM
Posted September 20, 2009 - 04:40 AM
Posted September 20, 2009 - 12:50 PM
Posted September 20, 2009 - 12:56 PM
Posted September 20, 2009 - 02:26 PM
the bike went in about 2 weeks ago and they replaced the neeldle and lapped the seat as t was allowing fuel to pass through the carby had a full clean and treatments i had an inline filter put in before the carby and i noticed there was a couple of rock fragments i pulled the top off the carby and moved the slide up and down and pullde off the bowl but it seemed clean the rubber around the carby to cylinder looks reasonable condition if you wind the idle right up it will start but runs rough i am still trying to familarize myself with the carby set-up could the choke be causing a problem? fuel is about 1 week old it just happened as i pulled up from a ride. the bike has about 3500 klms on it and has been well maintained i bought it off my brother-inlaw this is the first time it has ever had a problem but it did sit there for a few years with lack of use
You need to pull the slide from the top of the carb and check the flat plate that installs on the forward (toward cylinder) side of the slide to ensure the little hole is at the bottom, not the top. This piece is deceiving, as it looks like it should go in the other way, putting the hole at the top and will cause your bike to RUN EXACTLY AS YOU DESCRIBE. Ask me how I know this.....
Posted September 20, 2009 - 03:00 PM
Posted September 21, 2009 - 01:13 AM
also the bike was getting the speed wobbles and the front wheel was washing out really bad as the ride progressed it seem to work a little better or i was getting use to it? if any one has any thoughts on how to fix this problem and a big thankyou to the people that responded to this thread all information helped me rectify my problem
Posted September 23, 2009 - 07:12 AM
It's hard to gauge whether the Hot Start plunger is closing fully as you can't see in there, but probably a good idea to eliminate it by taking it out for a clean and lube the cable. I replaced the cable after a local MX shop told me it was quite common for these cables to shrink.
Worked for me, just an idea.
Posted September 23, 2009 - 10:49 AM
i just pulled the pilot jet out i'l need to pick something up to clean it it does appear you can see a light through it and the pilot air screw is wound in full tight is this correct the bike has been running reasonably well about 200 klms without a drama since the carby was pulled and cleaned and new needle then suddenly she stopped and then i started to get the above problems
guitar string works great to clean jets with. FYI