Quote:
Originally Posted by SHRuuM
The cam lobes are ground down on the lower side and extra metal added to the top, tip for a bit longer duration. During this part the motor is asking for more mix but the carbs are out of fuel so the only thing left during the intake stroke is air...thereby making it lean and starving for fuel. She's parked and won't run til after the jets arrive and I'll be sticking by what Chad at Sudco recommended, since he is the guru of the CR-S carbs and start with 135's[but ordered 140 and 145's], a 65 pilot since idling is a problem and a 5180 needle which is the next size from my 5181. This is all by the book and recommendations to start with and work my way up progressively till I reach the desired A/F.
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the only thing more cam does is make less vac at lower rpms and flow more all the way through,yours is lean all the way through and its not just a little lean its way lean.Just a little change wont cure yours as lean as it is.Even with stock carbs and preds no air box you need atlest a 140 main on these bikes.If the cr carbs flow better then stock carbs you might need more then that(if the jets are the same size pre number as the stock carbs)maybe the guy knows something I dont ,I dont know anything about cr carbs,I cant see running them they dont flow enough.Did you get any spec. on the street cam lift /duration?
