Join Date: Apr 2017
Location: Charleston, WV
Year/Make/Model: 2009 Kawasaki Vulcan 900 Custom SE
09 Vulcan 900 Custom SE Bogging under acceleration
Hi everyone, I am pretty new here and hoping you guys and gals can help me with some troubleshooting.
My bike is a 2009 Vulcan 900 Custom SE with just over 12k miles. Here is some background on my current issue. Late last week I rode to work. On the way to work the bike ran fine, no issues what so ever. At the end of the day I started the bike and let it warm up and everything was business as usual. The bike ran fine until about halfway through the trip home. I was cruising along at about 65 mph and slowed down slightly to go over a large dip in the road. Upon accelerating I got about 1/4 way into the throttle and the bike started making a noise I cannot describe well and seemed like it had no power. I downshifted, the problem persisted. I kept on the throttle while it made what I can best describe as a BOP BOP BOP BOP BOP sound, not backfiring but very sluggish and not wanting to accelerate. The rest of the ride home it was difficult to get the bike moving from a stop, I would have to let the clutch out very slowly and give it a very small amount of throttle to even get moving. I experienced the same sluggish feeling, sound, and loss of power the rest of the way home.
To address the issue I called a local shop to get their input. The mechanic told me that it sounds like I had water in my fuel. It did rain while I was at work the day I rode, which is the only thing that changed between the ride there and the ride home. Since speaking to him I siphoned some fuel out of the tank into a mason jar to check for water. There was no definite line of water and fuel but I did notice several tiny shiny bubble setting to the bottom of the jar. The day it happened I added Sea Foam to the tank. After speaking to the mechanic I added a bottle of ISO Heet to the tank in hopes of absorbing the water. I went for a ride the day after adding ISO Heet and the bike did slightly better, but still not back to normal. Today, I said screw it and drained the tank and filled it with premium fuel and Sea Foam. The bike ran much better today, however the sluggishness and BOP BOP BOP BOP sound is still occurring intermittently. With the most frequent occurance of the issue being during accelerating from a dead stop and if I am in a gear that is too high for the driving condition. If I give the bike more than 1/4 throttle now it will act appropriately the majority of the time, however the issue persists. I have also installed a new air filter.
Any info or suggestions you folks can send my way is greatly appreciated. I am no mechanic, but I like to give things a try on my own before dropping a ton of cash at the dealership. Thanks for reading my giant wall of text!
2009 Vulcan 900 Custom SE