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It seemed to run just fine to me. I don't race it around though. I'm hearing it helps to ride it real hard every now and then. I just always put 91 octane and after I drove it to work one day (a 35 mile trip) it didn't start after I got off work. Pretty weird. I finally got it started after...

I agree. The dealership here (North County Yamaha in San Marcos California) do not have technicians that can diagnose. They can see the end result and replace bad parts, but they cannot tell you why it occurred in the first place. My suspicion is the valve seats were not pressed correctly and...

Well I finally got my motorcycle back. Six months later! I had to pay $1200. Yamaha corperation and the dealership are blaming it on the gas. Yamaha corporation are recommending I use (what do you know!) a Yamalube product called "Engine Med" in every tank of gas. I am currently writing up...

Makes a lot of sense. Thank you.

Thank you, that is what I would expect.

Thanks for your response, I wish I would have the same experience. It is trippin me out because the fix is only $1200. And to be so stubborn over it is strange to me.

Thank you.

Does anyone know how long piston rings are to last before going out of spec?

Tabasco, have you spoken to your friend who had the same issue? I'm wondering if and how he fixed it and if he still owns the bike. Thank you.

Aegis Powersports Extended Service Contract continues to stonewall me. After presenting them with specs on piston rings being out of spec., they again responded with the "poor fuel" excuse for the massive carbon buildup. They also said there is a normal and acceptable amount of oil leakage and...

Thank You for that info. I'm still getting the run around from the extended service contract company. Even though it was pointed out that one or more of my piston rings is out of spec at 16,000 miles. Beware of Aegis Powersports extended service contract company! They are really trying to...

What is also funny is these are the out of spec rings that the dealership provided me measurements on. They said nothing about the third ring. Super unimpressed with their "lead technician".

Yes it is an extended service contract the dealership sold me when I bought the motorcycle. It is called Aegis Powersports. I gave them $1,215 for this extended service contract that covers the whole motorcycle, all systems, etc. against "mechanical failure".

I am not sure about that. I can ask.

I found out in the last couple days that the top piston ring on one of the pistons is at its limit as far as specs go and the second ring was out of spec. They called Aegis powersports for a second claim with new information and Aegis is sending an adjuster out again tomorrow to look at the...

Thank you Steve. I would expect mine to perform the same, but it did not. maybe I shouldn't be using 91 octane, I really don't know.

I am attaching the photos from my engine. I had an expert look at the photos and he pretty quickly suspected oil getting into the chamber somehow. He also noticed black buildup on top of the valve guides and pistons are very dirty. I did find out new information yesterday after three months...

I wish they would have gotten the bike started before tearing it apart like they did. They may in fact could have found the "false lean" condition you mention. They just turned the engine over and it wouldn't start. Without trying anything else to get it started, they took it apart.

Thanks for your response Steve. I hope the mechanic didn't misdiagnose from the get go.

I just asked for photos today 4/21. I went by personally the other day and because of Covid, I could not go into the dealership. Hopefully they will send photos soon. I asked for top and bottom of valves, bottom of head, top of pistons, etc.