07-29-2019, 02:18 PM
(07-24-2019, 10:09 PM)Inhouse Bob_imp Wrote: This discussion leads me to question my own situation. I generally wear pretty good ear protection and the engine sounds like the proverbial sewing machine all the time. But once in a while I will forget the ear plugs and everything is louder. That's when I notice that under pretty good acceleration I hear distinct ticking from the engine. It runs as it always has with no discernible difference over time. So, is this the injectors doing their thing or valves rattling around? It's got 15k miles on it, mostly casual riding though I do prefer to keep the revs elevated (3500 to 4500 RPM are normal, I guess).
Or maybe I should just put my earplugs back in
I don't think anything went out of the spec after 15k miles... Air cooled engines are always more noisy compared to liquid cooled ones...
Also, here are my measurements.
Odo is 36k miles, last check was at 12k miles at dealer's shop and I believe no adjustment has been done.
(measurements are in mm)
Clearance; Old shim size; (Old shim marking); New Shim Size
Cyl 1:
Ex
0.31 2.012 (200) 2.050
0.33 1.976 (198) 2.025
In
0.18 2.027 (202) 2.050
0.19 2.027 (202) 2.075
Cyl 2:
Ex
0.30 1.930 (192) 1.950
0.33 1.928 (192) 1.975
In
0.18 2.029 (202) 2.050
0.20 1.981 (198) 2.025
Cyl 3:
Ex
0.32 1.910 (190) 1.950
0.32 1.908 (190) 1.950
In
0.19 1.979 (198) 2.025
0.19 1.956 (195) 2.000
Cyl 4:
Ex
0.30 1.910 (190) 1.925
0.30 1.915 (190) 1.925
In
0.21 1.956 (195) 2.025
0.21 1.981 (198) 2.050
The numbers of existing shims look not round. I think part of the reason is because I used inch micrometer and converted all values to mm. Probably some systematic error is involved.
My bike is '13, I typically keep revs between 1.5 and 4k PRM unless this is 5th gear and there is no next gear to gear up. I also accelerate aggressively most of the times.