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I have been running my mk3 with bellmouths fitted(odd ones so they fit),just fitted a s+b one piece and it run crap,will I need to re jet ? if so any tips on size etc.
ta Pete
Logic indicates that you w…
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What jetting and slides ar…
What jetting and slides are you running at the moment ? Small individual or double filters with a back face close to the carb don't really seem to suit Commandos and make the carbs difficult to tune.
I found that slides with a larger cutaway helped to disguise the lower-mid flatspot but never got rid of it completely.
Do you have 850 cutaway spray tubes with the long needles ? Although fine with the big airbox, They will complicate things too.
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Logic indicates that you will have to downjet. Just keep going down in size until it runs correctly.