06 kodiak sputtering.

Sticky valves. Check the timing too.

The high speed jet isn't rich enough or the carb passages needs to be cleaned. You can move the clip down one spot on the needle so it gets more gas, this will also give you more power at the top end.

IS THE CARBURETOR AIR FILTER CLEAN?

was just working on a scooter with the same prob, turned out to be the cdi. I'd check other things before replacing that though. cracks in the intake boot, adjust valves, test plug and coil.

Sounds like a frailed throttle cable, or that it might be rusted or mucked up with something. Would undo it on carb and see if it has full throttle movement on the cable. If you have not done this yourself before best to have it done professionally or do some read up good luck hope this helps

tank airiation fuel tap filter tankfilter clean? sludge removedl a canister automotive engine cleaner for the fuel are by cleaning carburetor( if there is a L+R re-adjusted) are the gaskets changed and correct placed especially between cilinder and carburetor. there can be especially a small channel in it that it was wrong replaced or is the compression good enough ?
Compression is the very most important thing there is to look at the exhaust site to the piston that must be smooth otherwise there was a problem by overheating piston if there are grooves there can be a wrong adjusting of the carburetor or by a quality problem of the used gas

clean carburettor.check fuel line for clots and replace filter.

check out your timing chain.

CARBS NEED TO BE WORKED ON .

hey,
Maybe your break calibars could be sesede.