19-09-13, 03:45 PM
(19-09-13, 10:56 AM)simonm link Wrote: Whilst looking to see if thundercat brake levers would fit on a FZS600 I wondered why it's widely stated that the Fazer (95bhp) is based on a detuned thundercat (89BHP) engine.
How is it detuned if it has more power than the thundercat ? (I understand the thundercat probably has more low end and maybe through the rev range due to the ram-air doo dah ?)
It looks like the Thundercat has 87.7 bhp @ 11,250RPM whilst the Fazer has 95 bhp @ 11,500RPM. The Thundercat is allegedly 223kg and the Fazer 189kg. Surely the weight makes up for some of the lack of power ?
Don't get me wrong, I'm sure that the seating position and front forks and fairing make the Thundercat a quicker bike, I'm just wondering how the engine is 'detuned', it sounds like an insult since at certain times (??) it will be more powerful than it's brethren.
I know Punk likes the Thundercat and that is enough for me to safely believe that it is a cracking bike, this is not supposed to be a criticism of either bike, just a question.
I wonder if anyone can point me to a dyno from a stock Thundercat and a stock FZS as that may shed some light on it for me.
TIA
https://en.wikipedia.org/wiki/Yamaha_YZF600R
https://en.wikipedia.org/wiki/Yamaha_FZS600_Fazer
http://www.carolenash.com/insidebikes/bi...600-fazer/
Other note Simon is that ram air only works at high speeds. It's basically a very basic form of a turbo - you have scoops at the front which when riding, send air into the airbox. The quicker you go, the more air is forced into the airbox! Was an experiment done (I'll see if I can find the write up) on a ZX9R (one of the first big sports bikes to have a proper ram air system) - whilst around town it doesn't make a difference, at speeds of about 140+ the ram air essentially added about 6hp to the bike!