Hi im new to the thread. I have a 07 500 and it has issues running. I can get the bike to run for about 2 to 5 min before it starts too get funky. The Rpm gauage will go from 2k to 11k back and forth rapidly and there is loss of power. If i let off the throttel the bike will try and play catch sometimes dying and sometimes succeding. the bike will jerk while its trying to catch up any ideas on This problem? thanks

 

You are all over the place and this email is vague, but let's go:

When you start the bike, do you leave the choke on with the bike idling for several minutes, to "warm up" the engine?

If your answer is "yes", please stop doing that. You are destroying your engine. Instead of doing that:

1. Sit on the bike, holding it upright (off the sidestand) with your legs, with your helmet and gloves on the flat gastank. (Starting the bike while level ensures that the oil will be properly distributed throughout the engine without pooling over to the left side.)
2. Pull the choke lever 1/2 to 2/3 of the way back. (Not full, unless it is cold where you live and absolutely necessary.)
3. Turn the key; push the start button and feather the choke lever so that the bike idles at 1500-2000 rpm
4. Put on your helmet & gloves, put the bike in gear, and push the choke lever all the way forward once you are rolling.

The longest you should let your engine idle with the choke on is one minute--anything more than that will foul the plugs, rinse away the oil film on your cylinder walls and eventually ruin your engine. Overuse of the choke is one common cause of carburetor problems and frequently results in latent damage to your engine which will significantly shorten its service life.

Good luck and let us know how it goes.
Safe riding!
-CCinC

 

I had a 250(blasphemy...I know) at one time and it had a very similar to yours among others. I later found out my battery cable fasterners were literarly held to together by paperclips. Once the paperclips overheated(in about a minute or so) the engine would behave erratically and the tachometer would fluctuate dramatically until it altogther ceased to run or the paperclips dissolved. I doubt you problem is due to paper clips, but the problem may very well be the battery fasteners, bearing in mind the youth of your bike.