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FJR Motorcycle Forums
Technical & Mechanical Problems
Will Stuck TPS stop bike from Starting
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<blockquote data-quote="ionbeam" data-source="post: 1000148" data-attributes="member: 277"><p>If the mechanic said that the TPS is responsible for two cylinders having low compression you may want to shop for a different mechanic. I don't believe that the TPS has ever totally failed, it just develops little areas that cause misfire (because the ECU reads this as 20% throttle opening regardless of engine load).</p><p></p><p>It doesn't really matter if the problem is in the valves or head gasket, the amount of work is just about the same. Hopefully your new mechanic will be able to do a leak-down test and tell you with certainty what the problem is. A few FJRs have been prone to carbon around the valves and some have been susceptible to stuck rings. (Yamaha's Ring Free works wonders for both.)</p></blockquote><p></p>
[QUOTE="ionbeam, post: 1000148, member: 277"] If the mechanic said that the TPS is responsible for two cylinders having low compression you may want to shop for a different mechanic. I don't believe that the TPS has ever totally failed, it just develops little areas that cause misfire (because the ECU reads this as 20% throttle opening regardless of engine load). It doesn't really matter if the problem is in the valves or head gasket, the amount of work is just about the same. Hopefully your new mechanic will be able to do a leak-down test and tell you with certainty what the problem is. A few FJRs have been prone to carbon around the valves and some have been susceptible to stuck rings. (Yamaha's Ring Free works wonders for both.) [/QUOTE]
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FJR Motorcycle Forums
Technical & Mechanical Problems
Will Stuck TPS stop bike from Starting
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