carb putter

[david]

I've got a small putter or backfire comming from the carbs into the air filter box on an 81 GS1000G. I'm new to the mechanic world. What might this mean?

[mark]

All the time? At idle, on acceleration, deceleration? All through the RPM range or just at certain rpm's?

[david]

All the time? At idle, on acceleration, deceleration? All through the RPM range or just at certain rpm's?

Starts when engine is warm at idle.

[bwringer]

Intake leak?

Which could include any or all of the following:
Intake o-rings, carb boots, airbox/carb tubes, airbox

The sides of the airbox should be sealed with foam -- if the original foam is still in there you'll need to replace it with weatherstripping.