Oooh baby....you are sexy!

[karl_1052]

Originally Posted by shmike

Peak HP and peak torque on the Buell XB12R is at 6750 RPM.

That's at the very TOP of the rev range.

Fact.

Buell XB12 makes 60 lbs/ft of torque at 2000rpm(75lbs/ft at 6000rpm)
Triumph 675 makes 35lbs/ft of troque at 3000rpm(47.0lbs/ft at 10400rpm)

Fact.

[shmike]

Originally Posted by karl_1052

Buell XB12 makes 60 lbs/ft of torque at 2000rpm(75lbs/ft at 6000rpm)
Triumph 675 makes 35lbs/ft of troque at 3000rpm(47.0lbs/ft at 10400rpm)

Fact.

I'm glad someone caught that.

It is a bigger motor with HUGE pistons compared the the 675, of course it has more torque.

The torque curve of the 675 is very linear and builds steadily like most inlines.

The Buell curve is funny. It is close to peak at around 2700, then falls on it's face and doesn't get back into the 70's until around 5500.

FACT.

With the Buell, you're best served to keep it between 2000-2700 or between 5500-6750. Either way it is a narrow window.

OPINION.

[Tmall]

Originally Posted by shmike

I'm glad someone caught that.

It is a bigger motor with HUGE pistons compared the the 675, of course it has more torque.

The torque curve of the 675 is very linear and builds steadily like most inlines.

The Buell curve is funny. It is close to peak at around 2700, then falls on it's face and doesn't get back into the 70's until around 5500.

FACT.

With the Buell, you're best served to keep it between 2000-2700 or between 5500-6750. Either way it is a narrow window.

OPINION.

There are NO flat spots when you're riding it, and it pulls hard from 2500-7100 in every gear.

FACT

The window is far from narrow, as the bike revs slower than a short stroke 4. The only problem I have with the power band is that it doesn't drop anywhere, so I find myself hitting the limiter from time to time, since it just pulls hard all the way to it..

FACT

[Homeslice]

Burger King shits all over Micky D's

FACT







ok maybe opinion

[Amber Lamps]

Originally Posted by Homeslice

Burger King shits all over Micky D's

FACT

ok maybe opinion

Neither Ronald McDonald nor the Burger King are fit to lick Checkers BALL SACK!!! For drive thru type food, Checkers is the bomb!!! I had their Baconzilla burger the other day and almost nutted it was so good! Don't get me started on their wings and french fries... Oh and their shakes... ohhhhhhh... see ya!

[Amber Lamps]

Man that was good! A short ride and some Checkers food!

[shmike]

Originally Posted by Tmall

There are NO flat spots when you're riding it, and it pulls hard from 2500-7100 in every gear.

FACT

The window is far from narrow, as the bike revs slower than a short stroke 4. The only problem I have with the power band is that it doesn't drop anywhere, so I find myself hitting the limiter from time to time, since it just pulls hard all the way to it..

FACT

It is not a flat spot, it's a trench. I could easily feel it before a pipe and remap.

I agree that it doesn't taper off at the end. Very easy to hit the limiter if you aren't paying attention.

[Rider]

Originally Posted by shmike

It is not a flat spot, it's a trench. I could easily feel it before a pipe and remap.

I agree that it doesn't taper off at the end. Very easy to hit the limiter if you aren't paying attention.

That's true of any low reving V-Twin when you are used to power band characteristics of a I-4. I rode a Super Duke and it hit red line in a blink of an eye. I was consistently hitting the rev limiter in every gear.

[Tmall]

Originally Posted by shmike

It is not a flat spot, it's a trench. I could easily feel it before a pipe and remap.

I agree that it doesn't taper off at the end. Very easy to hit the limiter if you aren't paying attention.

What I find odd is that you're describing the flat spot basically right where the exhaust valve shifts positions. I could definitely feel the flow path change over, but would never have called it a flat spot.

Now that I have the way too loud pipe on it, no more "stutter" when the valve shifts.

Depending on the bike, the cable could have been loose for the valve, or the muffler could have been dented in a spot that would have compromised the smoothness of the valve movement.

[shmike]

I'm talking about the torque curve of the XB motor.

Here is Sportrider's dyno of the '04 XB12R.

Unless their bike's exhaust was dented in the same place as the Buell I had, I'll assume it was across all the motors of that year. There is a noticeable lull.

Maybe it's been corrected on the newer models, it pretty much went away with the new exhaust.