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FJR Motorcycle Forums
Technical & Mechanical Problems
Low mpg and slight power degradation
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<blockquote data-quote="Cosmin" data-source="post: 1182482" data-attributes="member: 17448"><p>So the symptoms were already there when the mechanic removed the TB for cleaning. Before installing them back on the bike, he made a basic sync by measuring and adjusting precisely the opening of each TB. Then he made the classic sync with the TB on the bike. Judging by the smooth idle, I would say the sync was made properly. Regarding carbon build-up - could it have been already there when the mechanic removed the TBs and made all the checks etc.</p><p></p><p>On the other hand - having mainly an "agressive" riding style, I also would think that carbon build-up in general was prevented.</p><p></p><p></p><p>I'll search for it; the conclusion is that SeaFoam doesn't always solve - but I suppose it won't do any harm, right?</p><p></p><p></p><p>It is quite visible in first gear since the "pulling" force is bigger (due to gearbox ratio). If I start in first gear "agressively" I won't feel it. It is there mainly when puttinig the bike in movement in first gear normally, not at sporty startup. In higher gear it happens in the step of rolling again the throttle immediatelly after clutch release during gear change. Actually the hiccup is more like a hitch/jerk and I think it's related to the response at low throttle opening angle than to rpm. Should I suspect the TPS (although on Gen II I hear no reports) or wrong TBS?...</p></blockquote><p></p>
[QUOTE="Cosmin, post: 1182482, member: 17448"] So the symptoms were already there when the mechanic removed the TB for cleaning. Before installing them back on the bike, he made a basic sync by measuring and adjusting precisely the opening of each TB. Then he made the classic sync with the TB on the bike. Judging by the smooth idle, I would say the sync was made properly. Regarding carbon build-up - could it have been already there when the mechanic removed the TBs and made all the checks etc. On the other hand - having mainly an "agressive" riding style, I also would think that carbon build-up in general was prevented. I'll search for it; the conclusion is that SeaFoam doesn't always solve - but I suppose it won't do any harm, right? It is quite visible in first gear since the "pulling" force is bigger (due to gearbox ratio). If I start in first gear "agressively" I won't feel it. It is there mainly when puttinig the bike in movement in first gear normally, not at sporty startup. In higher gear it happens in the step of rolling again the throttle immediatelly after clutch release during gear change. Actually the hiccup is more like a hitch/jerk and I think it's related to the response at low throttle opening angle than to rpm. Should I suspect the TPS (although on Gen II I hear no reports) or wrong TBS?... [/QUOTE]
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FJR Motorcycle Forums
Technical & Mechanical Problems
Low mpg and slight power degradation
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