500 Max HP RPM Verys Per Year ?

[BornYamaha]

I Have a 98 500xtc. I am trying to dial in to correct shift rpm. I notice on the web site that I have linked that different years max there hp at different rpm. Is this just a dyno variance or should I be looking at my exact year. most of the info for cluttch rpm on this site points to somewhere between 7600 and 7800 for the shift but that does not seem to be the case for the 98

98 - 90 to 91 at 7900 - 8200
99 - 82 to 93 at 7700 - 7900
00 - 88 to 89 at 7600 - 8000
01 - 88 to 89 at 7600 - 8000



http://www.m-performance.com/Sidor/dyno_yamaha.htm

 

[Turk]

Run it at 7800 rpm. 99.9% of em work best at those rpm,s.

 

[BornYamaha]

Thanks Turk, It was running at 8100 to 8200 before I started adding weight, I'm at 7900 Now. I'll Try Dropping it a little more.

 

[Turk]

Don,t trust the tachs to be as reliable as the newer ones. 7900 on that tach might be golden.