As per the title would this be a symtom of the Power valves not working?

I am just about to put all the std reed valves back in in an attempt to make my MC28 rev past 5500rpm.

All that is left of the tuning stuff i had fitted are my Tyga Pipes and Fontys Safe Main jet settings. It cant be that, as i have a spare set of std jetted carbs and it does it with those too.

Any idea's???

Cheers Rob
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Last edited by NSR250MC28SE on Sun Apr 19, 2009 5:48 pm; edited 1 time in total