Hi. Well my dirt bike was backfiring last time i took it out, so i cleaned the carby ect. I then started it up with the choke on and reved it fully and it didnt backfire , so i was happy. Well i took it out today. Got to the field, put choke on. Started it, It sounded like it was being reved fully when i wasn't even touching the throttle. So i tried reving it to see if it would stop it but it went louder.
I took the choke of and it just went from loud, down to off.
Now when i start it with the choke on its sound like its being reved fully.
When i start without choke, or turn choke of after starting with it on, it just getting quieter and quieter until it cuts out. I have to keep the revs up when the choke is off to keep it from cutting out.
Why is this? I have messed with the air screw on the back of the carby and nomatter where i put it it does this.
Sometimes it start ok but leave it for 10 seconds it just goes like it .
This is a video of it with the choke of. I start revving it to keep the revs up but listen as i slowly let go of the throttle..
Heres also a video of the bike when its got the choke on. Im reving it a little.
Oh and i have the air screw 5 full turns lose from when it is tight. I dont have the default number of turns but i have two of these bikes and the other bike runs fine like this .
I took the choke of and it just went from loud, down to off.
Now when i start it with the choke on its sound like its being reved fully.
When i start without choke, or turn choke of after starting with it on, it just getting quieter and quieter until it cuts out. I have to keep the revs up when the choke is off to keep it from cutting out.
Why is this? I have messed with the air screw on the back of the carby and nomatter where i put it it does this.
Sometimes it start ok but leave it for 10 seconds it just goes like it .
This is a video of it with the choke of. I start revving it to keep the revs up but listen as i slowly let go of the throttle..
Heres also a video of the bike when its got the choke on. Im reving it a little.
Oh and i have the air screw 5 full turns lose from when it is tight. I dont have the default number of turns but i have two of these bikes and the other bike runs fine like this .