My 2003 WR250F has been sitting since Christmas, or somewhere around there... Now, it won't start. What I've done so far:
.5 - changed oil... I didn't do this to solve the problem, I need to do it anyway, but I thought it might be pertinent to list all changes I have made to the bike in the last few days.
1. New spark plug - and I am getting spark.
2. Clean Air Filter - Twin-Air reusable, sprayed it good with solvent, rinsed in cold water, let it dry... re-oiled
3. Clean carb - took the carb off tonight, drained the bowl, inspected moving parts and cleaned fairly thoroughly with carb cleaner.
Still wouldn't start -
4. Removed air filter as I knew I was getting spark and fuel. Still nothing...
The bike will kinda start with the choke open, but it doesn't run very long, and it would miss and backfire quite a bit when doing so... Ran very rough.
Jetting has not changed since I bought the bike last year, and it was running fine.
I'm not a very experienced mechanic, and I'm hoping I missed something easy and that this will be a learning experience... Any ideas?