lbhbul Posted December 11, 2014 Report Share Posted December 11, 2014 Lorenzo, No I was referring to the older zinc body Mikuni side/bottom main jet (my preference) carb,24mm dia. which have found as a good Amal replacement. Larry Quote Link to comment Share on other sites More sharing options...
naichuff Posted December 11, 2014 Report Share Posted December 11, 2014 (edited) 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 December 11, 2014 by naichuff Quote Link to comment Share on other sites More sharing options...
bult360 Posted December 21, 2014 Author Report Share Posted December 21, 2014 They were a 24mm IRZ , hard to get parts for now , Quote Link to comment Share on other sites More sharing options...
bult360 Posted December 21, 2014 Author Report Share Posted December 21, 2014 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 3 Quote Link to comment Share on other sites More sharing options...
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