Posts
209
Joined
3/21/2011
Location
OK
US
Roach
3/8/2016 8:35am
3/8/2016 8:35am
Edited Date/Time
3/21/2016 7:22pm
Hi All,
I just purchased an 05 YZ250F from an acquaintance. I've been without a bike for over 6 years, and this is my first 4 stroke. He's had this bike since 09, and it has pretty much just sat in his garage since then. When I test drove it, it would only idle when the choke was on, and I ran it up and down the street with the choke on. It ran great. Pulled hard. But as soon as I turn the choke off, it backfires and dies. So here's what I did when I got it home:
Pulled the carb and cleaned the jets with carb cleaner and an air compressor.
I put it all back together and put fresh new gas it in, and fired it up. It is still giving me the same issue. It'll run and idle on choke, but just backfires and dies as soon as I take the choke off.
Any ideas as to what I should do next?
I just purchased an 05 YZ250F from an acquaintance. I've been without a bike for over 6 years, and this is my first 4 stroke. He's had this bike since 09, and it has pretty much just sat in his garage since then. When I test drove it, it would only idle when the choke was on, and I ran it up and down the street with the choke on. It ran great. Pulled hard. But as soon as I turn the choke off, it backfires and dies. So here's what I did when I got it home:
Pulled the carb and cleaned the jets with carb cleaner and an air compressor.
I put it all back together and put fresh new gas it in, and fired it up. It is still giving me the same issue. It'll run and idle on choke, but just backfires and dies as soon as I take the choke off.
Any ideas as to what I should do next?
The Shop
Paw Paw
You don't need a "jetting kit", just a new pilot jet and a fuel screw o-ring. You may also want to look at the accelerator pump diaphragm as they leak over time.
Paw Paw
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Now I'm going to need to order an accelerator pump diaphragm, this one is just falling apart. BUT, I also need another part that I can't find on the carburetor diagram. I've circled it in blue below:
Can anyone help me identify this part so I can buy a new one?
Why do you want to replace it? Is it clogged? You should be able to clear it with carb cleaner and compressed air. If it is clogged with pieces of the pump diaphragm it might take some time, but you should be able to clear it.
Paw Paw
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