Main Motorcycle: 2006 BONNEVILLE T100
Join Date: Mar 2008
Location: Miami, Florida United States of America
Other Motorcycle: 1999 TITAN PHOENIX
Engine missing while riding
First, here’s some background information:
Due to riding restrictions, this bike has sat in my garage for 6 months with a topped-off tank of “non-ethanol” gas (R90) and the battery plugged in to a tender.
Here’s what happened on my first ride last Friday:
The motorcycle fired right up, and after the usual warm-up time, I adjusted the idle to 1100 RPMs and rode off thinking how smooth the motor ran after sitting that long. I had no trouble at all riding through typical city traffic for about 30 minutes, but when I turned in to my first destination, the engine cut out. I didn’t think too much about it, thinking that maybe I had stalled it out while turning in, but I restarted the engine and pulled in to a parking spot and let it idle a moment before I shut it down and went inside.
After a visit that took about thirty minutes, I suited up and started up the bike without issue. I went on down the road and merged on to the Florida Turnpike where I was riding along at 70 MPH for about five minutes when, all of a sudden, the engine started missing and cutting out. The engine never actually stopped, but my tachometer was showing the RPMs were dropping to zero when experiencing these “misses”. I found that I could keep it from shutting down completely by working the throttle and keeping the RPMs up, or at least that what it seemed like to me. This went on for a couple of minutes while I managed to keep up my speed and got off at the next available exit. As the engine kept on running despite this, I worked my way back on to the highway and made it home, but it was very unnerving having the engine buck me while doing those speeds, not knowing if the motor was going to completely die and have me reacting to the drivers around me and ultimately finding myself stranded on the side of the road.
I have noticed over the past few years that my engine will sometimes “miss” every now and then, but it only happened while warming up and wasn’t an issue once running normally.
Could it be the pickup coil under the right-side engine cover? Or, the ignitor (ICU) under the seat is starting to fail? Maybe it’s just a bad plug or wire? It couldn’t be as simple as a clogged jet in one of the carbs, could it? I have an external filter installed. No, It really seems to be an electrical problem. What do I start with? I don't want to take it out for another ride until I address this.