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engine popping 2008 crf 450r

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started my bike up today and seemed to be popping or mini backfire.

it was about 35 degrees and my gas is old, i was wondering if it could be the cold or older gas. the bike is about 2-months old bought it new in the crate.

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Put 1 size bigger pilot in too. Its warmer here than where you are and we usually go richer.

doc

PS....flush the gas if its been sittting. The crappy pump gas with ethanol we have these days won't stay fresh very long.

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Could be signs of your valves going tight too, cant hurt to check them.

Doubtful on a 2mo old bike unless he is hammering it every day at the track.

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Its a little lean do to the temp out side you just need to ajust the fuel screw or just leave it if you don't plan on riding until its warmer out.

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