I guess for me I would just like to understand what I’ve done that might be causing these problems. The bike has 78,000 miles. I go freeway speeds up to 90 mph, 100 miles, Monday through Friday. I follow the periodic maintenance guide, including valve adjustments. I use full synthetic Motul 10w-40. The motor doesn’t run at extremely high compression, so though I’m not a mechanic, I’m thinking that this motor is designed to easily go 100,000 miles without any major problems.
So, based upon what I’ve stated, how many issues could be causing these problems? What are the likely culprits? What could I have done differently? Are there other people in the forum with this sort of mileage who have had these issues?
Having not seen the bike personally (and admitting as much), Tabasco has stated his beliefs regarding carbon deposits. I know he has a good reputation in this forum, and perhaps that’s the only issue and he’s absolutely correct about the problem. That stated, other mechanics have stated “rarely is carbon deposit the sole reason for compression or no-start issues”. One mechanic stated that compression should be at 160 psi, and I politely thanked him for his time and don’t intend to ever return to that individual, because the manual clearly states that the compression is much lower than that, around 96.7 psi at 250 r/min. (He found compression on my bike to be at 65 and 45 psi.)
So I guess I’m just scratching my head,trying to figure out what past behaviors I’ve performed that would cause these issues on a 2016 that’s ridden highway speeds with annual mileage at roughly 16,000. I’ve rarely been off-road, keep the bike garaged when I’m not riding it. Really confused as to why this happened and what the possible culprits might be.