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FJR Motorcycle Forums
Technical & Mechanical Problems
Lost about 10 HP after valve check?
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<blockquote data-quote="longnokr" data-source="post: 399081" data-attributes="member: 1636"><p>I checked my valves a few weeks ago, (25k) they were all perfect so I just replaced the chain tensioner and thermostat while I was there. It all went together perfect, ran out good....just not great like before. It starts fine, runs smooth, no miss or hesitation, it just seems to have lost some grunt....and it won't power wheelie anymore!! It feels alittle flat in the midrange too. There are no fault codes, has a newer TPS, new plugs and air filter, good fuel, baro and map sensors check ok, all vac lines to pressure reg and map seem fine, all connectors are in place...is it possible the cam chain moved on the sprockets when I changed the tensioner? I didn't think there would be enough slack to jump a tooth, and I was very careful, but I'm about down to pulling the v/c back off to see if the valve timing may be off a bit...any suggestions fellow gearheads??</p></blockquote><p></p>
[QUOTE="longnokr, post: 399081, member: 1636"] I checked my valves a few weeks ago, (25k) they were all perfect so I just replaced the chain tensioner and thermostat while I was there. It all went together perfect, ran out good....just not great like before. It starts fine, runs smooth, no miss or hesitation, it just seems to have lost some grunt....and it won't power wheelie anymore!! It feels alittle flat in the midrange too. There are no fault codes, has a newer TPS, new plugs and air filter, good fuel, baro and map sensors check ok, all vac lines to pressure reg and map seem fine, all connectors are in place...is it possible the cam chain moved on the sprockets when I changed the tensioner? I didn't think there would be enough slack to jump a tooth, and I was very careful, but I'm about down to pulling the v/c back off to see if the valve timing may be off a bit...any suggestions fellow gearheads?? [/QUOTE]
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FJR Motorcycle Forums
Technical & Mechanical Problems
Lost about 10 HP after valve check?
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