The bike has been sitting for about 2 months, maybe a bit more, so I decided to take her out for a spin today. Primed it, choked it, and it started up fine. Let it warm up and took off for a ride. Everytime I came to a stop, it would stall on me. It revved freely and seemed to be running fine, I just had to hold the throttle open when I came to a stop. 15 minutes to work and the problem is still there. I adjust the idle screw until it will idle on its own, but that caused the revs to drop very slow and while playing around with the screw and revving it I started getting a bit of backfire through the exhaust. The bike had been running fine prior to sitting, its a 96 GS with 6000 miles on it. Any ideas on things I can check?
Quote from: IN_DET on July 23, 2008, 03:59:02 PM
The bike has been sitting for about 2 months, maybe a bit more, so I decided to take her out for a spin today. Primed it, choked it, and it started up fine. Let it warm up and took off for a ride. Everytime I came to a stop, it would stall on me. It revved freely and seemed to be running fine, I just had to hold the throttle open when I came to a stop. 15 minutes to work and the problem is still there. I adjust the idle screw until it will idle on its own, but that caused the revs to drop very slow and while playing around with the screw and revving it I started getting a bit of backfire through the exhaust. The bike had been running fine prior to sitting, its a 96 GS with 6000 miles on it. Any ideas on things I can check?
Were the valve clearances checked at 4000 miles? If not, you may want to look at them now.
I wonder if it has a bunch of condensed water/crud sitting in the carb bowls? But only becasue I just drained crud out of mine (which was running fine despite that). Sitting for a while could lead to water buildup, especially if the tank was not full.
http://gstwins.com/gsboard/index.php?topic=43068.0 (http://gstwins.com/gsboard/index.php?topic=43068.0)
Some fresh gas and carb cleaner would be step 2.
mine sat for a week or two and when I finally started riding again, the idle was hanging, engine was backfiring, and had a slight knock err....tap. Tread carefully. A tappet was stuck open and allowed the piston to come in contact with an exhaust valve. The backfiring was from the valve not closing all the way. I doubt it's your problem, but there might be a speck of a chance it is, and that small speck can turn into a big headache if not corrected. My engine is having open heart surgery right now. if you do check the valve clearance, check to see that all the tappets spin freely all the way around. just a thought. but it's prolly something with the carbs.
OP fill the tank, warm it up as you said, or like you said, take it out, on some NOT TRAVELED BY COPS rd. and FLOG the f%$k out of it. ie run it hard, then see if it does this again. if so, check one other thing, check the idle speed setting :thumb:
It's a shame the bike had to sit for 2 months! Anyway, you most definitely can have issues with gas over that amount of time. Next time if you know it's going to sit for a while use some Stabil and make sure it gets worked into the carbs. I bought my bike at the end of April, and it had been stored by the previous owner over the winter with a full tank of gas. Despite the carbs being cleaned last season when he bought the bike, I 'm sure they need it again. It's given me some pesky little problems since I got it home, but thankfully not enough to keep me off the road. I'd drain the gas out and put some fresh in, but it still might not cure ALL your ills.
mine did as well, ↑↑↑, but after a through flogging, she absolutely sings now :icon_twisted:
Quote from: yamahonkawazuki on July 24, 2008, 12:08:51 AM
mine did as well, ↑↑↑, but after a through flogging, she absolutely sings now :icon_twisted:
I've put almost 1800 miles on it since I got it, but it still won't idle very well. Sometimes I roll up to a stop and it'll idle at 900 RPMS. The next time, it'll hang at 2000 for just a few seconds before settling back down to 1200. Anytime I crack the throttle at idle, it's doesn't return to normal idle speed as quickly as it should. But, it's just been a mild annoyance. It doesn't stall or anything, and the backroad blasts don't seem to suffer any. :icon_mrgreen: