trevinator Posted May 30, 2022 Share Posted May 30, 2022 my 2017 has a grinding type noise that sounds like it comes from the left side of the engine at part throttle around 2-4k rpms depending on engine load. it doesnt sound like any noise a chain would make, its hard to describe the noise. if your easy on the throttle, it doesnt do it, but apply just a bit more throttle and you can hear it, but apply full throttle and its gone. its driving me nuts not knowing what the heck is causing it! could this be the gronk i have heard about from the clutch basket at only 4k miles? anyone else experienced this? Link to comment Share on other sites More sharing options...
kilo3 Posted May 30, 2022 Share Posted May 30, 2022 My gronk showed up around 4-5k miles on my 2020, taking care of mine this next winter. Link to comment Share on other sites More sharing options...
trevinator Posted May 30, 2022 Author Share Posted May 30, 2022 12 minutes ago, kilo3 said: My gronk showed up around 4-5k miles on my 2020, taking care of mine this next winter. is it as simple as replacing the rubber dampers in the clutch? what causes this noise? Link to comment Share on other sites More sharing options...
nhchris Posted May 31, 2022 Share Posted May 31, 2022 38 minutes ago, trevinator said: my 2017 has a grinding type noise that sounds like it comes from the left side of the engine at part throttle around 2-4k rpms depending on engine load... I switched to an undamped 17 front sprocket on my 2016 FJ and really amplified the noise you describe. But it also was noticeable with the OEM damped sprocket. Here is my theory... The noise emanates from front sprocket / chain interaction. Under full load, either from engine breaking or acceleration, the noise is minimized because the chain is held tight against the sprocket. Under a partial load, such as running along a flat section of road, the chain rattles against the front sprocket causing the noise. Cut or advance the throttle and the noise is reduced. Yamaha specs ridiculously tight 5mm chain slack for the FJ. Nobody runs that here and instead uses 35-45mm of slack. I wonder if the Yami spec is an effort to minimize this annoying rattle. 1968 Triumph Bonneville 650 1971 Norton Commando Roadster 2002 Harley 1200 Sportster 2003 Honda ST 1300 2016 FJ 09 Link to comment Share on other sites More sharing options...
HGP61 Posted May 31, 2022 Share Posted May 31, 2022 10 hours ago, nhchris said: The noise emanates from front sprocket / chain interaction. So, with that in mind would a good quality after market chain and sprocket set fix the gronk Link to comment Share on other sites More sharing options...
peteinpa Posted May 31, 2022 Share Posted May 31, 2022 No. The noise comes from worn out rubber dampers in the clutch basket. Chain and sprockets make their own noise. Link to comment Share on other sites More sharing options...
Ride365 Posted May 31, 2022 Share Posted May 31, 2022 So I assume this is an FJ-09 issue overall and not a Tracer GT issue? Link to comment Share on other sites More sharing options...
Mark Jackson Posted May 31, 2022 Share Posted May 31, 2022 My Tracer with 26k miles had this problem, I replaced the clutch basket and it's like having a new bike! If you can identify the problem as definitely being the Clutch basket and you are keeping the bike for a while I'd recommend the OEM item, expensive but once it's done you'll be very happy. Link to comment Share on other sites More sharing options...
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