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FJR Motorcycle Forums
Technical & Mechanical Problems
Bike Wont Start
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<blockquote data-quote="RiderJoe" data-source="post: 1461739" data-attributes="member: 93203"><p>All ideas mentioned in the previous three posts are possibilities, but carbon builds up over time, and as others suggested, there would have been noticeable warning sins of it happening, and not a sudden failure of all 4 cylinders. The “valves stuck open’ explanation from the dealer after the bike sat for a week isn’t likely because only one set of intake valves are open at any given time. (Exhaust valves are less likely to build up carbon to begin with.) If there were manufacturing changes made to FJRs that would mean a lot more reports of this kind would be mentioned in the forums. It seems though per the photos that carbon did build up in a relatively short time and the cause of that is unknown. Bad gas quality is unlikely, since on the 7k trip many different fuel brands would be used, and not all bad ones.</p></blockquote><p></p>
[QUOTE="RiderJoe, post: 1461739, member: 93203"] All ideas mentioned in the previous three posts are possibilities, but carbon builds up over time, and as others suggested, there would have been noticeable warning sins of it happening, and not a sudden failure of all 4 cylinders. The “valves stuck open’ explanation from the dealer after the bike sat for a week isn’t likely because only one set of intake valves are open at any given time. (Exhaust valves are less likely to build up carbon to begin with.) If there were manufacturing changes made to FJRs that would mean a lot more reports of this kind would be mentioned in the forums. It seems though per the photos that carbon did build up in a relatively short time and the cause of that is unknown. Bad gas quality is unlikely, since on the 7k trip many different fuel brands would be used, and not all bad ones. [/QUOTE]
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FJR Motorcycle Forums
Technical & Mechanical Problems
Bike Wont Start
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