new bike new problems

**biker122** · 04-22-2012, 01:49 PM

hey guys, im having some trouble with my new to me 91 F2.

Its my first bike, and this is our first season together. When i started it up after the winter, it was leaking gas all over the place. I waited a couple days and the problem fixed itself (im thinking the float valves got un-stuck or the o-rings started working again lol)

now..ive noticed that the idle is kinda rough. when i come to a stop, it takes a while for the rpms to get down to 1500 rpms. And once it gets there, it kinda jumps up and down +/- 200 rpms.

Also, when the bike is cold, the throttle response is pretty bad. But once it warms up, it revs like no tomorrow with even the slightest flick of the wrist.
Since the bike is new to me, I can't tell if these problems are new or just there because the bike is so old.

Any help would be appreciated.

**RockerGuy** · 04-23-2012, 07:44 PM

sounds to me like carb problem.

BTW, when the bike is cold its suppose to be unresponsive especially if its carb'ed

**gav.man** · 04-26-2012, 08:51 PM

Sounds like your running slightly lean. The carbs drying out can leave deposits that can affect your jetting. Try a dose of Seafoam carb cleaner. If that doesn't work, open your idle jet screws 1/2 to a full turn.

**biker122** · 04-28-2012, 12:03 AM

Originally Posted by RockerGuy

sounds to me like carb problem.

BTW, when the bike is cold its suppose to be unresponsive especially if its carb'ed

thank you. I feel MEGA relieved to hear that the unresponsiveness is normal on cold carb'd bikes.

And gav.man thanks also for the help. I dont think the carbs need any adjusting cuz everything else is working great except for that leak on the first start after winter. I will add some seafoam though for extra measure.

**anark** · 04-28-2012, 08:41 AM

Your bike leaks gas, has a rough idle, your throttle isn't consistent and you still don't think you need to adjust anything on your carbs? good luck buddy.

**Stewart** · 04-29-2012, 09:57 PM

you need a carb overhaul, because you stored it with gas with 10% ethinal. the pilot circut plugs first.

**toysareforboys** · 04-30-2012, 02:59 AM

Originally Posted by Stewart

you need a carb overhaul, because you stored it with gas with 10% ethinal. the pilot circut plugs first.

Yep. So many peeps have had probs this spring after storing their bike using fuel with Ethanol in it. The only fuel that doesn't is Shell 91 and Ultramar 91!!!

People says "it isn't bad for the bike" BULL ****! It leaves this super hard varnish type coating on your carb jets, fuel injectors, etc. My friends R6 was running like crap after the winter. He used Sunoco 94 (the worst stuff). It turned out to be a fuel injector stuck wide open! It'd just piss the fuel right out, not a nice spray or anything. He got all 8 of his injectors professionally cleaned and it runs like a champ now. Shell 91 for him from now on!

-Jamie M.

**biker122** · 04-30-2012, 05:09 PM

Originally Posted by anark

Your bike leaks gas, has a rough idle, your throttle isn't consistent and you still don't think you need to adjust anything on your carbs? good luck buddy.

well it only leaked gas the very first time i tried starting it. I took the gas tank off to take a look, jiggled some hoses around and waited a couple days. Leak stopped completely. no problems there. The idle has gotten much better as well. When i posted this thread, I was still running the tank with fuel stabilizer in it. After finishing that tank and getting fresh gas everything has been working great.

Throttle response is fantastic as well once the bike warms up a bit. But apparently its supposed to be like that on old carb'd bikes?

what exactly does a carb overhaul entail? Just cleaning and syncing?
and thanks for the info. I didn't know ethanol was so bad. Guess im going to shell from now on.