Non Biased Opinions 650twin vs 660
#2
Instead of comparing the Kawie twin and the Raptor engine (they are different in too many ways), I can tell you the basic differences between the power of a twin and a single -- I think that's what you're getting at?
Two engines, one a 650cc single (four valve, dual overhead cam). The other, a 650cc twin (8 valve, single overhead cam).
The single will have more torque, rev slowly and top out at a lower rpm. For pulling power, the single would be the best.
A twin will rev more quickly, have less torque, put have a peak rpm of 2,000 to 3,000 more than the single. For quick horsepower, the twin would be best.
Hope this answers your question.
Two engines, one a 650cc single (four valve, dual overhead cam). The other, a 650cc twin (8 valve, single overhead cam).
The single will have more torque, rev slowly and top out at a lower rpm. For pulling power, the single would be the best.
A twin will rev more quickly, have less torque, put have a peak rpm of 2,000 to 3,000 more than the single. For quick horsepower, the twin would be best.
Hope this answers your question.
#6
Pam, you stated that Yamaha's motor is the Raptor engine?? You are wrong there, it shares some designs features but it is NOT the Raptor engine. It shares the 5 valve design (not 4). It sits it at a 45 degree angle like Hondas do and it has a shaftdrive therefore no where near the Raptor engine.
#7
<< You are wrong there, it shares some designs features but it is NOT the Raptor engine. It shares the 5 valve design (not 4). It sits it at a 45 degree angle like Hondas do and it has a shaftdrive therefore no where near the Raptor engine. >>
I thought he was just looking for a generic, which is better, two cylinders or one type of answer.
As far as which is specifically a better engine - the kawie or the yamie, there's no way to separate a shaft-driven engine from it's chassis -- the chassis makes a big difference in how a 4x4 engine performs.
Even if you compare hp and torque numbers, it's all a moot point if the chassis design doesn't work right.
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