So I'm back to my 92 FJ after over a year of being out of the country. I was riding the other day, and as I was pulling into the garage I could swear I heard a sort of "chuff-chuff" from my machine. She's also been very hard on gas, harder than I remember since my departure last Spring. I'm kind of worried.
Sitting for long periods is bad for the carbs. Did you prep the bike before parking it?
http://www.samscycle.net/Storage-warning-local-gas.html (http://www.samscycle.net/Storage-warning-local-gas.html)
The bike has been run regularly (no less than once every few weeks) since I've been gone. I had noticed this developing even before I'd left. During the weeks just before my departure, I had heard and felt it missing when the bike wasn't warm.
Not a lot of information to help you with at this point. Start checking the easy stuff. Plugs, plug wires. Spray WD40 around the carb boots while under idle, possible vacuum leak. :scratch_one-s_head:
Totally agree duff plugs or an air pipe of some description has rotted (old age) then given up all together. Change the plugs have a good look at all the rubber pipes should be good to go. If not might be time to look at carbs?