How do I make my 600 fazer faster?????

[nick crisp]

I used to do quite a bit of engine tuning in my younger years, swapping cams, porting heads, bigger carbs etc....... It rarely makes the bike "better" for the road, peaky power delivery, boggy at the lower end, stupidly high tickover that's lumpy as fook, nightmare to ride in traffic. Overheating, unreliability, the list goes on.
You'll gain a little power by cams/head tuning, but won't necessarily make the bike faster. The best tuning you can do, is get the suspension sorted, then some advanced training, or track tuition. THEN it'll be a lot quicker! You watch a good rider on a 400 hit the twisties, he don't need massive power, just big skill!

Yeah, that follows everything I used to read on the subject - conventionally high-tuned engines don't run very well low down - however I once rode a Z1R that had been heavily breathed on by John Carpenter (legendary Kawasaki tuner of Mistrals fame), and that thing was rapid! Also it didn't seem to be too bad low down, and idled ok.
I wonder if a decent carbs/exhaust route (maybe flat slides or just larger carbs with necessary mods elsewhere) might not be a better way to go?
I used to read loads on this tuning subject, but I was younger then and didn't really understand half of it, and I've probably forgotten most of the rest!

[quote author=nick crisp link=topic=755.msg94853#msg94853 date=1376686078]
I think maybe high lift cams would also make the engine more peaky? (i.e. less torque/mid range but more top end revvy). That's about as far as my understanding goes, and I'd be interested to hear from someone who really knows what they are talking about!

A higher lift but equal duration cam gives engines more low end torque, as a rule it's the duration and overlap that give an engine more top end power.


A good explanation is here:
http://www.streetracersonline.com/articles/camshafts/

Something to note though, is with higher duration cams there's more valve overlap, which is why engines with cams like that run like shit at low rpm.

Although the rules on overlap on the site change with forced induction; you don't need as much because the turbo or supercharger is forcing the mixture in, so can minimise it at low rpm.
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Haven't looked at your link yet, but will when I have more time. I read that high lift cams work better with forced induction. Is this just an obvious thing or are there particular reasons for that?