There is work that can be done to valves and valve seats. 3-angle or 5-angle valve jobs. It has been noted that the gains from this on a 150cc single cylinder engine are very small. If you absolutely need to trim 1/10th of a second off of your run time then by all means get a valve job; otherwise, you should not spend that dime. If this is something you are skilled enough to do on your own then go for it; but if you are considering paying someone to do it for you, your money would be better spent on something else.
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MXR TrailBender 160R
SYC Perf head P&P,Matched intake and exhaust, A12 cam, Orange CDI & coil, Motorio pulley, 115mm Variator and lightweight drive face,11gm Sliders, UNI, modded muffler + 200 horsepower 
http://www.youtube.com/watch?v=3hx-hEWl10c
I'll take your insults as compliments and blame it on your lack of intelligence.
Last edited by SLESTAK75; 05-11-2013 at 02:30 PM.
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