Bad running/back fire
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thebassmasta
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personally if it was me i would dump the jetex and get yourself a 25mm dellorto, Harry knows his stuff but i dont like jetex carbs.
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CPH Lambretta
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Like I said in the original post I have dumped the Jetex and am running a 22mm Dellorto and it hasn't helped (not useing the jets or atomizer from the jetex of course)
Slow is the new fast!
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thebassmasta
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have you checked the fuel flow yet?
Have you spoke to harry about it?
Have you spoke to harry about it?
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CPH Lambretta
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Ive tried harry several times but couldnt get hold of him, havent had time to get in the garage and check the fuel flow yet 
Slow is the new fast!
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thebassmasta
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keep trying harry, i know hes been away but he is about
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CPH Lambretta
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So after being on holiday for a couple of weeks I final got some time in the garage and sorted my problem! It was fuel starvation.
I checked the fuel flow from the tap and that was well over half a liter in a minute, so I checked the flow through the carb and that was only about 300-350ml in a minute, so I drilled out the hole behind the float needle with a 2.5mm drill and after that it flowed about 400ml in a minute. Put it all together and took it for a run and it still ran s**t, but quite a bit better with the choke on.
So I drilled out one of the indian atomizers I had lying around to 2mm (the previous one was 1.5mm) and it was totally transformed, it goes much much better.
Considering its a very mild 175 tune running a standard 22mm carb and standard 40 year old pipe I'm well happy with the performance,smiles all round
.
Thanks for all your help
I checked the fuel flow from the tap and that was well over half a liter in a minute, so I checked the flow through the carb and that was only about 300-350ml in a minute, so I drilled out the hole behind the float needle with a 2.5mm drill and after that it flowed about 400ml in a minute. Put it all together and took it for a run and it still ran s**t, but quite a bit better with the choke on.
So I drilled out one of the indian atomizers I had lying around to 2mm (the previous one was 1.5mm) and it was totally transformed, it goes much much better.
Considering its a very mild 175 tune running a standard 22mm carb and standard 40 year old pipe I'm well happy with the performance,smiles all round
.Thanks for all your help
Slow is the new fast!
