This is a new bike to me this spring but I still don't have 30 miles on it. The problem is just that, starts fine, runs good cold, but after 5 minutes one cylinder starts becoming intermittent. A timing light narrowed it down to the rear cylinder spark becoming flakey. I've already replaced the coils, ignition wires and caps. Timing is spot on, gas is good. I did find one of the hoses off on the gas tank, an air bleeder but it made no difference. Also found one of the coil's two slip on terminals were reverse wired, made no difference. Also found a mouse made a nest in the air cleaner, a new one made no difference and I added a wire mesh to the air box intake. Any ideas?
Rear cylinder cuts out under 4000 when hot
- Thread starter pmok
- Start date
The bike isnt blowing any codes? No arcing at night ? Doesnt really sound like a crank/cam position sensor but I wouldnt rule them out. I hate to sound like an idiot but I would get at least one or two cans of freeze mist and start hitting parts once the bike is misbehaving. It sounds like you can "see" the issue with a timing light?
Any other wires that the friendly rodent nibbled or did any nest material make its way further in (unlikely if air filter in place though).? Would check wiring very carefully and also all the ecu connections hiding under the tank area. Could possibly be a fuel or fuel supply issue if the bike had been stood a while but really on the NT700 would not expect only one cylinder to be affected. Certainly sounds electrical in some form......