K11 Owners Group

[Off the grid]

From the guy who thought "Slab" was an actual road surface.

Feel free to laugh out loud, but I want answers!

1. What exactly is a 2-stroke engine? What makes a 2-stroke different from a 4 stroke.

2. What exactly is a powerband?

3. If you use a clean towel after you get out of the shower, why do you have to wash towels?

Thats all for now kthx!
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Bane of your existence since July 2006
2007 Triumph Tiger ABS. "Sabertooth"
2009 Husqvarna TE610. "The dirty Italian mistress"

[Jim Brotherton]

Judgeing from the time post I would say 1) That Saturday night date with the girl down the street didn't farm out or 2) She said she had to stay home and wash her hair . Either way you have way too much time on your hands

Jim
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1995 K1100RS
2004 R1150RT

[Off the grid]

See sig.

Had company tonight, shes passed out on the couch now.
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Bane of your existence since July 2006
2007 Triumph Tiger ABS. "Sabertooth"
2009 Husqvarna TE610. "The dirty Italian mistress"

[duckbubbles]

OK, I'll give it a shot.

1. Two stroke: Our street bikes (K's, R's) are four stroke. That refers to the intake, compression, power and exhaust events that take place to make the engine produce power. On a four stroke, each event is given (more or less) 180 degrees of crankshaft rotation to accomplish (1/2 turn). Down- intake, up- compression, down- ignition/power, up- exhaust. A pop every OTHER revolution of the crankshaft. Described as one stroke of power and three strokes of wear.
On a two stroke, these events are combined into only a single up and down movement of the crankshaft. Up- intake/compression, near the top- ignition, down- power/exhaust/start of intake. A pop EVERY revolution. Two strokes are heavily dependent on subsonic pressure waves moving in the intake and exhaust tracts to effect breathing and power. Notice the fat mid sections and skinny tail ends of the exhaust systems. Most two strokes also breathe through the crankcase and have no internal oiling system. The oil is mixed in the fuel or injected into the intake. No oil changes! They also mostly have ball or roller bearing main and rod bearings. Maybe this is getting too technical.

2. Power band- This one is all over the map. It depends on what definition you want. I think our K bikes' power band is from about 2000 rpm to 8000+. If you are talking about the peak power output it is in the 6000 to 8000 range. Most people are talking about the latter. I laugh at the bike mags doing tests on middleweight 600's and saying the midrange (9000-11,000) is good/bad/indifferent. The rpm range is dependent on the engine design. Bore/stroke/rod length ratios, valve size, number of valves, component weight, etc. Then there is torque....

3. After a shower, you are theoretically as clean as you can be. Washing towels seems to be superfluous, until they start to smell.

Frank
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85 K100/1100RS, 321,000 miles, 25 years
96 Ducati 900SS/SP, sold it
05 R1200ST, 35,000 miles, 5 years
400,000 BMW miles

[Daniël V]

[Flying Duck]

Here's the power curve for a K1100 engine. The top curve is power and the lower curve is torque.



75 kW= 100hp (roughly)

"Power band" generally refers to the higher portion of the power curve. This is why you hear people talking about "hitting the power band." For the above chart, I'd say the power band for a K1100 is in the 4 or 5 to 8,000 rpm range.

What does all of this mean? The only fun way to ride is above 4k with the throttle pegged.
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93 LT (x2)
94 RS
86-97 K75F(K75/100/1100 Frankenbrick)
86 K75C w/paralever, hi perf cams,TURBO!
91 & 92 K75Ss
91 K1
86 custom K100
14 WR250R
IBA #17739 (SS1K, BBG, 50CC)
Buy parts HERE

[BobZ(IL)]

Use a silver sharpey pen and place a small mark on your tach at 1500 rpm's less than redline. Then make another mark at 2000 less than the first. Next, go out on your favorite deserted curvey road and burn it up staying in that rev range. You should be able to go like hell without risking any engine parts.
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'93 K1100LT
'78 R100S
'05 R1200GS
BMWMOA, CRBMWOA, ABC, K11OG #997

Live well, do good work, enjoy the ride.

[rydor]

In regards to #3: After 2 weeks or so of using the same towel, I start hanging my Aerostich in the bathroom after rides. When I eventually hear them fighting in the middle of the night, I know it's time to wash the towel.

[Off the grid]

[Shoganai]

[rydor]

[John Clauss]

Every time you rub against something you lose skin cells. It is estimated that over a life time you actually consume about 50 lbs of skin cells from your mouth and throat. Anyway, when you use a towel many of those skin cells stick to the towel, then because they are dead they begin to rot. Let that go long enough and you get rotting flesh smell.

About 85% of your household dust is flaked off skin cells as well.

Sometimes being a Biology teacher means you know too much!
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1997 K1100LT
1975 R75/6

It will bring you so close to nausea, it will make you sick! - Big Al

[Klinker]

[abreeze]

I remember being at a bike shop and hearing some Red Neck 1st grade adult asking the sales man "does this bike have powerbands"??? and his brother/cousin/father replied "hell yess, its got like 5 of em"!!!!

I was educated..........