82 GS1100GL Hesitating between 4 to 5K RPMs

[rscbao]

:shock: Valves were adjusted a few weeks ago mostly to .0025 (.0012 to .0030 is the range). The bike rode smooth for a while. Took a 75 mile ride and two days later, starting spitting a bit of fuel into the airbox once the bike was stopped and switched off but seems to have stopped for now. However, particularly in 4th and 5th gear, and between 4 to 5k RPMs the bike hesitates but picks up after 5K. Would it be valves or carbs or something else?

[chef1366]

Check for rust in the tank. Also make sure the fuel tank is venting through the fuel cap and the float bowl vent lines that come up over the airbox from in between the carbs. Also make sure your fuel line isn't kinked or collapsed and the petcock screen is clean. Also check the petcock for free flowing fuel.

[rscbao]

Check for rust in the tank. Also make sure the fuel tank is venting through the fuel cap and the float bowl vent lines that come up over the airbox from in between the carbs. Also make sure your fuel line isn't kinked or collapsed and the petcock screen is clean. Also check the petcock for free flowing fuel.

Thank you for these tips. From what you have offered, it has more to do with fuel flow and air than with valves or carbs.

[chef1366]

I'm just starting with the basics until the carb cleaning process. Gas spitting in the airbox is usually a bad petcock (fuel leaking through the vacuum line) or a blocked float valve. It could also be a bad o-ring under the float valve.
See here