Hi I have a Yamaha 2003 800 XLT that I have had two engine failures in the last 2 1/2 years. I am going to order another engine from SBT but would like to know what the problem is. My current engine had one cylinder spark plug gap which was smashed close . It has 30 psi while the front is 120 psi. I used pre-mis at 40:1. Do I just have bad luck?
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Re: Yamaha 2003 800xlt engine failure problem
Originally posted by dlane123 View PostHi I have a Yamaha 2003 800 XLT that I have had two engine failures in the last 2 1/2 years. I am going to order another engine from SBT but would like to know what the problem is. My current engine had one cylinder spark plug gap which was smashed close . It has 30 psi while the front is 120 psi. I used pre-mis at 40:1. Do I just have bad luck?
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