Winter jetting

[atvmbaca]

Just wondering when it gets cooler out do I need to jet up a little
bit because the air is more thicker this is just what I was told
please let me know what you think a few people have told me when it is coler out or even cold the bike seems to run a little bit
leaner??????

[brian400ex]

Yeah thats true. How much you need to richin it up i don't know.

[atvmbaca]

Thanks for your response I live In mesa AZ my current set up is this 38 pilot needle on fourth notch and 152 main with no Air Box
lid do any of you think my main jet is to small I was thinking of moving it up to a 155 or 158?????

i was wondering the same thing abt the jetting. also do u have to go down in weight of oil?