ok a few weeks ago i did a top end rebuild on my 97 Zr580 Efi alrite after that i put about 300 miles on it ran great...it has been sitting for about a week and a half due to lack of snow...today i took it out and it was running good for about 2 min but then it wouldnt rev over 7,000 rpm's. ive seen this refered to as "limp mode" on this sight before. anyways i came home and checked the plugs,,they were good so i fired it back up it ran decent for about a minuite then back to limp mode! can anybody help??