Training Wheel Hero
Join Date: Aug 2016
Location: Dayton, OH
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Engine troubles on an 8,000 mile CBR 600RR..HELP!
I'm having engine troubles that I just can't seem to wrap my head around and I need help. I have a 2011 Honda CBR 600RR that has 8,000 miles on it. I've put 5k on it myself. I took it to the dealer for the 8k check. Probably not the best move but I don't like wrenching on this. I save that for my dirtbike. They changed fluids, chain tension and similar things to those. They said they didn't touch the engine. I went to pick it up and the battery was dead while the bike was sitting in their maintenance bay. That's embarrassing if you ask me. We jumped it and I rode it home with no issues.
Here's the problem. I went to ride it about a week later and the battery was dead again. Makes sense if it won't hold a charge. I went to jump it myself and I screwed up by using a car. It didn't even cross my mind at the time to not do that. My screw up. I trailer it to the dealer to have them look at it. He came back and said the compression was at 25 in all cylinders. Long story short I was already frustrated with the dealer so I trailer'd it to another shop. They say, and I trust them, that all four cylinders completely failed a leak down test. 100% passage. His thought is bad exhaust valves. That's a huge job to pull the motor to look and see.
My issue is that the bike has never been rode hard or red lined. I think it's an electrical issue because I can't see how I can ride a bike home with zero issues, that day or ever, and then 10 days later there is barely any compression and 100% leak. So my question is..Is there anything electrical that could have been fried from the jump start? Does the ECU control the exhaust valves in anyway? The dash lights, headlights etc all work so I would think if the ECU was bad then nothing electrical would work? Is there a fuse or anything like that downline from the ECU that could be burned? The bike has an exhaust servo motor that could be toasted and I know the bike wont start if the ECU doesn't recognize that servo plugged in. Even if it was bad you would still have good compression on a test right? I almost want to put a new ECU in and see what happens before spending $1500 to pull the engine and head.
Any ideas or thoughts is greatly appreciated guys. I'm average with mechanical knowledge and all my guys I talk to that are way smarter than I am are also stunned that a low mileage bike that didn't have any problems now has low compression and zero leak.
2011 CBR 600RR Dayton, OH