When is a 750 a 375?
So last night, I rode from work about 30 miles on the freeway doing an average of 70mph and then stopped at a grocery store to get some dinner. When I came out of the store, and cranked the bike up, it sounded weird, and sounded like only one cylinder was firing... I rode it about a half mile down the road to meet with some guys, and it had definitely turned into a 375cc! No good!
I don't know what happened since it had run perfectly from work to the store... I checked the spark plug wires, holding them up to the plug, and could see (and feel) plenty of spark from both of them... I checked the exhaust, and the front one is high pressure and hot, while the back one is lower pressure and cool air... no gas smell...
When I try to ride it, it obviously struggles to accelerate because of only one jug firing, but it also backfires like crazy... I'd have thought it's because of the fuel dumping into the rear exhaust and exploding, but that doesn't make sense since the rear exhaust is cool...
I "limped" it home about 5 miles or so, but didn't do any more diagnostics last night...
I posted this in the carbs/fuel section because I'm suspecting it's a carb issue, but wanted to see what y'all thought before I did anymore troubleshooting...
Current Ride: 1995 Vulcan 88 (1500A9)
Purchased Dec. 2014
approx. 6,800 miles
Previous Bike: 2000 VN750 "Glory"
With homemade stator
Details on stator build here
"Four wheels move the body. Two wheels move the soul"
"You live more in 5 minutes on a bike like this going flat out than some people live in their lifetime." - Burt Munro