hello
i have problems to start my 2009 crf 450. I replaced the gas filter remount everything, connected all wires,... but now the bike doesn't start anymore. Has always started very well after 2 kicks. Now I have been kicking for more than 20minutes, the ignition works, but it's like the gas doesn't come to the engine. Hard to say if the gas pump starts or not because i have no battery so it only starts the moment i kick. I haven't tried yet to start it downhill just engaging a gear. Have you ever had similar problems or any idea about what could be wrong ? thank you a lot for your answers.
I had a similiar issue, bike was hard to start. Pulled the fuel pump apart, cleaned the filter " I think i was missing the same seal you mentioned"
I tested the pump, it works, I went to the next part in the fuel line, the injector *The problem* it was partially clogged, cleaned it out now the bike starts 2nd kick, and no more power loss at high rev.
Hope this helps p.s the injector is a bit tricky to get at on the crf450r, make sure to clean your fuel line also.