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Old November 24th, 2017, 11:05 PM   #7
Ram Jet
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Name: Bill
Location: Port Huron, Michigan
Join Date: Mar 2017

Motorcycle(s): 2007 Kawasaki 250 Ninja, 1982 Honda Ascot FT500

Posts: A lot.
Quote:
Originally Posted by 1994Ninja250F View Post
Yes plugs out. I’ll try that, it feels kinda lean in the midrange though, wish getting the needles was as easy as turning the screws. Either way, I’ll richen up the idle mixture. If it’s not going to harm anything I’ll probably end up leaving the needles as they are, unless I have the tank and plastics off for another reason.
Cold winter air is denser than summer air so I would assume that winter air contains a-bit more oxygen. I don't think, on average, a change in air temperature would merit a major jet change. Your engine may run a tad leaner but that may just help clean-up carbon in your combustion chambers. I did have a car one time that had a-little more power on a cold day or a very humid day but it was ridiculously over-carbureted. It was a 78 C.I. auto engine with two Weber two barrel 40mm sidedraft carbs on it.

Bill
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