Rpm redline????

[buelladdicted]

the most important factor that determines rpm, peak HP,torque etc.is not really size of parts,or degree of v configuration,altho they all contribute.The relation of bore diameter to length of stroke matters the most.There are several reasons and I will generalize,leverage,friction,balance,larger bore allows larger or multi valve configurations per displacement.there is no one factor that determines power curve or rpm capacity more than this.when a motor is square, stroke is equal bore diameter,when its over square bore diameter is greater,when under square like our 12s stroke is greater than bore.xb9s are over square and thus the rpm difference and more peak hp per displacement,1125 ,more over square,more rpms,and much more hp,and the much more,comes from optimizeing all the above mentioned factors.The fact that our 12s make the hp they do along with the torgue is why I like it.When it comes to motors you cant really have it all,but my xb 12 comes close for my preference.

 

[1sexynucca]

I just got two new powerbands over-nighted from tokyo. All i can say wall i can really feel the difference..

LMFAOO you guys are too funny, lol lets play nice shall we??

 

[redliner172]

I just ordered Powerband in Green Funny a friend and I were just talking about this the other day, calling a new parts guy at a local store and having him look up crazy stuff that doesnt exist.

 

[roadsrfr]

basically the red line is lower because of the stroke being longer then the imports. the torque after 3000 is usually pretty constant it would be a straight line on paper at least on the xb9

 

[hula Buell]

My friend...Please.Because we bad and they ain't...

 

[Johnny2Bikes]

Funny that a powerband in green was mentioned. Last week, I bought a set of Green Powerbands from the Mother Earth catalog. I was skeptical at first when I received them and realized they were nothing more than compressed alfafla chunks. Boy was I wrong. All I can say is that it IS possible to have a two stroke powerband in a four stroke. Let me try to explain. Cows eat alfalfa. Cows fart. A lot. The force of those farts can be a memorable experience to those standing behind a cow. Now, introduce that technology to your engine in the form of more fiber (not the carbon kind) and you will not only propel yourself further with each engine revolution, but when the bike puffs out a really big one, well Katy bar the door. The downside is the exhaust note, but that's a mall price to pay for the gains.

 

[vanson1200r]

Many reasons: Small bore and long stroke makes for low RPM's because of piston speed. This motor is called "under square" while a 4 cylinder has a large bore and a short stroke also called "over square". The valves are operated by pushrods which makes for heavy valvetrain mass which again makes for low operating speeds. Plus the motor in these bikes were first penned when the earth cooled.