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FJR Motorcycle Forums
FJR Specific Discussion
How Long do FJR's keep their Power
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<blockquote data-quote="markjenn" data-source="post: 336959" data-attributes="member: 42"><p>This is one of those things where there is going to be very wide variance between samples, but I'd guess most bike engines run their best when they complete break-in (1K-5K or so) and then very slowly lose power over the lifespan of the engine as valves stop seating as well and rings allow more blowby. But in a well-maintained bike, I wouldn't expect power to be down more than 5% up to 50K or so.</p><p></p><p>Dynos vary all over the map, so your 120.4 vs. 123 really isn't statistically signficant. About all you can say is that there doesn't appear to be any major problem.</p><p></p><p>I've always found the best way to check power is to top-end the bike on the same stretch of deserted road every now and then. Of course, that's a lot harder to do safely with a bike like the FJR and foolhardy on bikes like the Busa or ZX-14.</p><p></p><p>- Mark</p></blockquote><p></p>
[QUOTE="markjenn, post: 336959, member: 42"] This is one of those things where there is going to be very wide variance between samples, but I'd guess most bike engines run their best when they complete break-in (1K-5K or so) and then very slowly lose power over the lifespan of the engine as valves stop seating as well and rings allow more blowby. But in a well-maintained bike, I wouldn't expect power to be down more than 5% up to 50K or so. Dynos vary all over the map, so your 120.4 vs. 123 really isn't statistically signficant. About all you can say is that there doesn't appear to be any major problem. I've always found the best way to check power is to top-end the bike on the same stretch of deserted road every now and then. Of course, that's a lot harder to do safely with a bike like the FJR and foolhardy on bikes like the Busa or ZX-14. - Mark [/QUOTE]
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FJR Motorcycle Forums
FJR Specific Discussion
How Long do FJR's keep their Power
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