making the bike faster

[benzimo_]

Hello everybody, unsure how to use this site so hopefully i’m doing it right but ported the cylinder heads out (lots of imperfections surprisingly when cast) and milled it so that 99 octane fuel can now be used to my advantage for extra power on the 600 (engine was already out replacing the 2nd gear shift fork)  however this does mean regular fuel will cause detonation so premium only from now on yay

[Gnasher]

I'm sorry to say, you're/you have wasted your time and money fella.

Porting is for 2 stokes, gas flowing is for 4 stokes, just gas flowing an FZS600 head will get you almost nothing.  The bike can already use 99 or 100 octane fuel as standard, gains err almost nothing.

These engines are already in a high state of tune as standard, they require serious (cams, pistons, over bore, carbs etc) engine work to get any meaningful gains, all possible but very expensive and not worth the gains.  Biggest up grades to a standard engine which will give you better mid range is fit a free flow air filter and an open end can, nothing else needed.   

[BBROWN1664]

Easiest way to make a bike faster is for the rider to eat less pies.

[unfazed]

I presume you mean gas flowing, Smoothing of cast rough intakes ports on the carburettor engines reduces atomisation of the fuels and can lead to unburnt fuel which then reduces power. Smoothing the exhaust ports expel the burnt fuel as fast as possible is a better option. Not worth the effort on the FZS600 as the engine is in a highish state of tune as it is. You would most likely end up with less power engine. Reprofiling the cams may be a better option but is it worth the cost for a small gain.

[fazersharp]

If you want to make the 600 go faster then learn how to ride it --if you want to go faster in a straight line then get the 1000 but be prepared for the 600 to be all over you on the bends