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Carburation Fine Tuning On A 1968 Model 49


bult360
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My Bultaco Sherpa 250 1968 had a amal concentric on it but my pals 1967 5speed had an IRZ as on the 4speed the body was prone to wear as was the slide these were made to a price and suffered a bit in wear

Edited by naichuff
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  • 2 weeks later...
 

After a bit of messing , I ended up going up 1 size on the main and up to a 40 on the pilot which is standard (I thought it was 20) and with the needle clip in the middle position and roughly 2 turns out on the air screw , bike is now bang on with no pinking , thanks for all the suggestions

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