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It sounds like the carbs are gummed up from sitting. The fuel that we get now is very unstable and gums up quickly. When you choke the bike it is bypassing the carbs and that is why it runs. I would suggest a carb clean and fuel tank flush, the carbs are very intricate and should only be worked on by a qualified technician.
Thanks,
Steve
The problems with a plunger style choke happen when the rubber on the bottom becomes deformed and does not seal or the spring does not push the plunger down hard enough, or the cap breaks so the plunger is not pushed down hard enough. If you put your finger over the hole and the bike runs properly your bike is running on choke. You have to block the hole deep inside the carb to shut off the choke. I assume the original problem was that the bike would not idle .If this is the case, take the carb apart remove the slow jet and clean the jet and the carb body out so fuel will flow at idle. This should fix your no idle problem.
hi,i might be wrong,but the first place i would start looking is the carbs,there are two of them and it has all the symptoms of imbalanced carbs,if you have a set of carb balancers then the job is relatively easy,if not,then you will have to take it to a shop to get done,the adjustments on the carbs are very very fine,the difference between running perfect and not running well is about 1/50th of a turn on the balance adjuster screw,if the carbs have been tampered with or as is normally the case,as the bike ages and all the parts start to wear the carbs will go out of balance,and it will severely affect engine performance,get the carbs tuned up and i am pretty sure you will have a new feeling bike when you get it back..hope this helps...cheers
The neutral safety switch is out of adjustment. Most bike won't start unless it is in Neutral or the clutch lever pulled in. Get a new battery and charge it up full. The intake boots need to be replaced or it will run lean. That is why you need to chock it to get it to run.
Sounds a lot like fouled fuel jets in your carb; you may have a little work to do.
If the jets do not allow sufficient fuel to pass, using the choke can 'cheat' the carburetor by restricting the flow of air and restoring the fuel-air ratio.
You can't ignore this problem since the 'cheated' condition does not let the engine develop the power for which it was designed.
I am having a similiar problem. bmw r 1100 s will only start with full choke and will die if I cut off choke or give it any throttle. This is my first bike and it has been sitting in a garage for 2 years. I took out the carbs, cleaned them and rebuilt them. I didn't find any residual in the carbs and they were very clean. Today, I was able to get the bike running and took it down the neighborhood but after the bike warms up it idles at 6K! Man... If I can't find any answers from this forum, I will probably drop it off at the motorcycle shop just down the hill from me. Any suggestions anyone? I think I will try to drain the fuel and give it new gas. But still....
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