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99 350 Big Bear......runs good no power

heshtesh

By heshtesh
in Yamaha ATV Forum

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heshtesh Newbie

heshtesh

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Hello I recently picked up a 99 Big Bear 350 4x4 in very nice condition, the problem i'm having is it makes no power, even when in neutral when I rev the engine from idle it's extremely lazy building rpm.

Pulled the carb today and found the larger(easier to access) jet was a little plugged so removed it and blew the crap out, the smaller jet(more shrouded) looks to have an x-web in it that doesn't want to come out, i'm thinking there should be nothing in the jet so i'll be ordering new ones.

I still have a feeling it runs deeper than just the carb, although the valve train sounds okay i'll be pulling the timing adjuster out to make sure it's not extended to it's limits, if the timing chain adjuster checks out ok what might you suggest I look at next?  Thanks in advance for any suggestions put forth.

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