Bike spluttering/backfiring? NOW WITH MORE VIDS

Hey all my new bike doesn't rev consistenly all the time, sometimes it just splutters. I have adjusted the small circlip on the carby slide and tried all positions and found 2nd from the top to be the best. But this has not solved the problem, it feels like the bike doesn't rev as far as it should and it cuts out and in the mid range it cuts out and you gotta back off for a second then it comes good.

So i've tried the circlip what is the next thing to try? What else could be causing this

maybe the carb is full of shit.. pull it apart and clean it out,,, maby try a new fuel filter.

Will do that tomorrow.

I think i fixed it, the plug that goes into the C.D.I unit has 5 female connectors in there, one of the females was not pushed right in, so i think when connected to the male on the C.D.I it wasn't getting full contact. Do you think that could've been the problem?

I'm about to go out to the bush and test it out properly.

It's still doing it, i don't think its fuel because i have tried every setting on the needle in the carby. I think its gotta be something in the electrics.

Can the C.D.I units be faulty ? I have checked all connections they seem to be ok.

On the coil on the left side i see there is some wires in behind there, to take the coil off do you need a torque wrench when you do it back up ?

Mate...check your spark plug. Even if you get a spark when u test it up against the head, it doesn't necessarily mean your spark plug is working properly, remember, your plug will make a spark a lot easier out in the open it's another story under pressure in the cylinder. I had the same problem you described and a new plug sorted it out.

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i had the same problem, changed the spark plug, worked like a charm next ride. seriously.

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The standard plug was "Torch" brand, i have changed it with a NGK CR7HSA and it still has the same problem?

you must eliminate one thing at a time or you won,t know where your at, you know your new sparkplug is good now you must go through the carby clean out and also the fuel tank internal , [ remove and flush out ] if you still have problems after this clean out you may have an electric problem.

RDRacing, i dont think its a carb problem to be honest :?

Because the plug is pretty black so it makes me think it is already getting enough fuel or too much, it is set on the 2nd leanest circlip setting right now which seems to be the best.

I will try cleaning out the carby anyway and see what happens

Would the best way to clean the carby out be just to open it up and goto the service station and use they're air compressor to blow through most of the holes and the main jet ?