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I have a 2001 yamaha kodiak400 it has fire and gas i adjusted the valves to right ajustment but still no go can you help me with my troubles thank you ed
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get a colortune tool.it shows how your firing.read instructions that come with,so simple to tune carb in with.sounds like pilot out of adjustment.could also have a leak in ur carb boot or head.take a torch without lighting open valve with motor running run torch around gaskets and front of carb boot listen for change in motor.if it gets higher rev uve found a leak.
Sounds like you may have a problem with the float valve in your carberator. If it's stuck open, even when the engine isn't running gas could be building up in the carb because your carb float valve isn't limiting it. And if it's building up and filling the carb, then it will eventually drop into the engine and subsequent oil pan. Look for signs of excess wet gas in the airboxin. That's a sign something in the carb isn't regulating the gas right.
You will need to find the timing marks and have the firing specifications to line it up. Most timing marks have the Top Dead Center position marked with a large raised triangle mark. Take out the spark plugs and use a pencil with an eraser to determine (by feel) when the piston raises all the way up the cylinder... this is the TDC position. Line up the chain so that the TDC triangle corresponds to the actual piston travel inside the cylinder. Once you have them aligned, dial back the timing the few degrees specified in the manual. Put the plugs back in and fire it up. It it sounds "off" then repeat the process, something wasn't aligned correctly.
Check your spark plug to see if it is fouled out see if it is dirty with carbon deposits white discolored or tan looking also check to see if the plugs are wet with gas or oil if everything looks good and you don't smell a high content of gas the next thing you could do is compression check and or check intake valves
If it's been sitting around for a while it could be the idle jet has a little craip in it (it don't take much) but if it's spitting fuel out then I would make sure the float levels aren't sticking.
Did you/your mechanic check the valve to piston clearance at max valve lift/PISTON HEIGHT??..you need at least .035" (.89mm) on the intake and .060" (1.5mm) on the exhaust.- MINIMUM - . THIS IS CRITICAL!!!
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.....11:1 is a pretty tall compression ratio. Are you racing this atv?.. one thing you will find out is that you NEED TO RUN HI-OCTANE fuel..NOT airplane fuel either (its got antifreeze and other additives you so not want to deal with)..11:1 might require a 110 OCTANE race gas to get it to run right... make SURE the timing is RIGHT!!..with this much compression the right fuel, timing, valve clearance, cam timing, etc, MUST be perfect!!!
There is an on line forum for the Honda 350 fourtrax. They discuss this problem at great length and recommend everything from using the choke and primer, replacing the spark plug with a hotter one for cold weather, to adjusting the valves to factory specifications, and rebuilding the carburetor. https://atvconnection.com/forums/honda/28277-honda-rancher-not-starting-cold.html Hope that will be helpful.
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