Just do some minor checking for now.....

125Z=2 stroke,125cc bike with no PV,definately have best acceleration,but
will consume alot of fuel,with slightly less top end.

ZX150=2 stroke,150cc bike with mechanically controlled single PV,not so good in acceleration,but will have good top-end & fuel efficiency.

WHAT IS PV(POWER VALVE)
The 2-stroke power valve system is an improvement to a conventional two-stroke engine that gives a high power output over a wider RPM range.

Thats why 125Z only operating in much lower RPM(around 6k-9k RPM)& most of 2 stroker with PV are operating in much wider RPM(around 5K-to 12K RPM)because the PV will activate around 5K RPM(if you ride many of the 2 stroke bike with PV,you will notice at lower RPM,it really sluggish before it reach it 5k-6k RPM for the valve to be opened,give the bike lot of smoother powerband,with more overall top-end)

Correct me if I wrong.....but I have the ZX150,& have tried RG120,125ZR,TZM,RX-Z,XJR600,CB919,ZX2R....

so,dont believe the 125z speedo,because the 0-100 is totally liar,when I tried the CB919(919cc 4 stroke)the bike only in 60km/h....so smooth power delivery,when the 125z speedo is clocked at 120km/h...

BTW,most of modification is to remove the exhaust catalyzer,which make the exhaust much more lighter,plus more baffling strokers sound!

But,if you got $$ to spend,why not try to put all-new full system exhaust,with newly size chamber,header,& end can.
Maybe you will feel the power much more improve especially at midrange.

This post has been edited by Cyprid Dark ii: Jul 29 2007, 12:26 PM