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I used carby cleaner and cleaned out the hole carby and the screw is about two turns out Sent from my iPhone using Tapatalk

Yeah I've tried spraying wd40 an it didn't change anything I even put new gaskets on it and it's still the same Sent from my iPhone using Tapatalk

Yeah it is central and how would that make it run badly tho? And yeah there is another on on the carby, I've had the filter on it and it still runs the same Sent from my iPhone using Tapatalk

https://vimeo.com/136177867 that's a video of how it back fires when it starts and how it runs but some times when it is running like that it does rev properly and backfires and god back to lumpy..... Just put a new spark plug in it and it didn't change anything Sent from my iPhone using Tapatalk

Yeah that's what it looks like on my bike and the spring is fine but I will take a video of it in a few minutes Sent from my iPhone using Tapatalk

No it doesn't it still revs but it's really lumpy and it randomly does rev properly then back fires Sent from my iPhone using Tapatalk

I just did the timing again and it's still running the same and I cleaned out the carby and it's spotless and put new carby gaskets on I kinda think it's something to do with electrics but I did try a different CDI and it didn't change anything Sent from my iPhone using Tapatalk

Yeah I'm pretty sure the timing is right the shop checked it and it was all good I even did and I also tried advancing and retarding the timing and it still ran the same but a bit worse... I will have another look at it today Sent from my iPhone using Tapatalk

I'm just so confused why it doesn't run cause before the rebuild it was running perfect and now it doesn't... How it runs, it's hard to start and it kicks back every time I kick it then when it does start it idles with a bit of a lumpy ness to it but when I I rev it it becomes really lumpy and...

Yeah I did check that and in my motor it's a 8mm bolt but I'm not too sure what they do look like when they are broken it didn't look like it was Sent from my iPhone using Tapatalk

Yeah the timing marks are perfect I even had a shop look at it cause he was doing the timing chain cause it was stretched and after he did that it still was running like **** I've rebuilt a lot of pit bikes before an I've never had this problem.. If it was the electrics would it be the magneto...

Hi there i really need help with my pit bike I've done a rebuild on it (done the piston and rings, timing chain, valve clearances) also cleaned out the carby, it was running before i did this and i also did rebuild it one before.. It does start but it is a bit hard to get running and everytime i...