ALSWEL Posted July 12, 2014 Report Share Posted July 12, 2014 All, I have acquired an '87 392 bore (Cub?) stock stroke, FMF Fattys, Cool Head (18cc), 700 ft elevation, stock reeds, race gas, unit that ran well with 34mm D-Slide carbs for a number of years. It was equipped with 220 mains and 22.5 pilots. Unfortunately one of the slides was chipped badly (upon removal) and they need to be replaced to get it running again. To this end, I have received new 34mm Flat Slides. They ship with size 280 mains and 50 pilots. I am sure you all know this already. My questions begin with, are the carbs similar in that the circuit settings will be close being that they are both Mikuni and 34mm? I see that the main jets appear to be the same type and transfer between the two carbs. The pilots do not, different types. I will need to order new ones.Again, if anyone is familiar with this setup, will the same jet sizes be applicable with the new carbs? I did go through the BDT and it wasn't very definitive. I also looked at the 'fill out this form' page and didn't see an answer. If anyone has a suggestion, thanks in advance. Quote Link to comment Share on other sites More sharing options...
WINDYCITYJOHN400 Posted July 12, 2014 Report Share Posted July 12, 2014 If it's a CUB cylinder, ditch those FMF FATTY'S. They are great pipes. But they ruin the power of a Cub. Even a small Cub. Quote Link to comment Share on other sites More sharing options...
ALSWEL Posted July 13, 2014 Author Report Share Posted July 13, 2014 (edited) <a href="http://tinypic.com?ref=2hhd9ig" target="_blank"><img src="http://i62.tinypic.com/2hhd9ig.jpg" border="0" alt="Image and video hosting by TinyPic"></a> Edited July 13, 2014 by ALSWEL Quote Link to comment Share on other sites More sharing options...
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