Please forgive this serious newbie question, but, I just got my bike back from the shop for a tune up and when I take off from a stand still most times the bike hesitates or just stalls.

I have to rev the engine very high before I release the clutch and even then that doesn't help.  I'm assuming it's a carb problem but could it also be a battery problem?  Would that hinder performance? Also, it's even worse in the rain.  Is this normal? I'd like to know the basic principle of this problem so I can take care of it better.  Any suggestions would be greatly appreciated.

Also, any recommendations of guys who do repair in NYC, besides Camrod Motorsports or Cycle Therapy would be great.

Regards,
Justin
NYC

Sounds like you need to let your engine warm up. That's the nature of carbed bikes. Just let the bike run for a while before you start to ride it to let the engine get warm.

Check your float height, if it is too rich, it will bog down with initial throttle, then rev up.  I had a similar issue, once I got the floats right, it is smooth as butter.  

If it is worse in the rain it could be electrical. Does it happen when the bike has had time to warm up. Maybe the dealer removed an electrical conection and didn't connect it back properly. Ask the dealer what they did to the bike for its service and tell them it did not have this problem before the service.

I agree with all of the above, and will add that when it rains, it makes it leaner. I would suspect float level too low.

When you rev it higher, how much higher? 5000rpm? 6000rpm? The only other thing that I can think of is if the shop messed with the camchain tensioner, they may have put it in fully extended, putting an unnecessary load on the engine; but I doubt this as you said the problem is worse in the rain, indicating an electrical or carburetion issue.

Ahhhh, the float, of course the float.  I have no idea what that is, but I'm going to buy the GS manual right quick so I can find out.

-Justin

Quote from: doublejnycAhhhh, the float, of course the float.  I have no idea what that is, but I'm going to buy the GS manual right quick so I can find out.

-Justin

The floats are what control the height of the fuel inside the carbs.  I doubt the shop would have touched this unless you specifically asked them to.  

Maybe ask the shop what they did and that will at least help to narrow down the problem.  I've never taken the bike for a "tune up" at the shop.  The only one was the initial service at 800kms.  I was a total noob then.

What's a tune up anyway?!? :mrgreen:

A tune-up, when I was working as a mechanic in '90, was a valve adjustment, replace the sparkplugs, synchronize the carburetors and check and adjust the tire pressures. A tune and service is where we do the same, plus change the oil and filter.