96' 900 with 22K. Starts and idles normally. Runs up to 4K still OK. But at 4400/4500 there is a subtle loss of power along with slightly more vibration in the bars. It feels like I'm losing a cylinder above 4K. It still runs with no signs of quitting but something is not right. I was forced to buy some generic fuel on a trip a week or so ago though I still used 92 octane. Felt guilty about putting that crap in her so I ran it until I thought it was pretty much gone and filled with Shell 92. After about half the tank of Shell was gone I ran her full throttle to around 7K a few times thinking it would help clean whatever was deposited (if anything) in the carbs and valves from the previous tank. Soon after, maybe two or three days, the loss of power began to show up. So what do you think? Where should I start? New plugs and wires? She's due for valve adjustment. What else? Could it be a coil? Carb? Both?
Thanks in advance
Rick
Thanks in advance
Rick