What RPMS do you run while cruising? Most Fuel Efficient?

[Trumpeteer]

Coming from a Bonneville and adding a Rocket to the garage I have learned that I am in need of developing throttle hand discipline

 

[TURBO200R4]

Coming from a Bonneville and adding a Rocket to the garage I have learned that I am in need of developing throttle hand discipline

throttle hand discipline
u & me and half the rocket crew
Jim Jim!!!

 

[juice_man_86]

Triumph states at 56 mph you should get 44.7 mpg but at 75 you only get 35.9 mpg. A significant drop. This is constant speed, I'm sure on a flat, on a Roadster

 

[Bob R]

Triumph states at 56 mph you should get 44.7 mpg

You mean for one very brief moment in time I am getting nearly 45 mpg on my way to 30 mpg.

bob

 

[1olbull]

I suspect the Bull was working the 140 back into the thread title

BINGO!
Please go to the head of the class!

 

[barbagris]

I have always found that there is a JUMP in consumption somewhere between 3000 and 3500 rpms. Last week I caught the jump by using earplugs (with gunfire filters) - 3200 the engine note changes appreciable - and on very light throttle. There is another close to 4000.

 

[Ishrub]

Can anyone guess I spent 23 years in the Australian Bureau of Statistics?

Not having a GPS speedo or riding my bike as I type could somebody confirm what the actual RPM per Kmh is in top gear? This is also affected by the angle of observation of the analog RPM and speed gauges

Calculated from data below:
2355 RPM @ 65Mph (104.60Kph) = 22.5143 RPM/Kph with Bridgestone Exedra EA1R 240/55-16
2445 RPM @ 65Mph (104.60Kph) = 23.3793 RPM/Kph with Stock tire AVON COBRA AV72 240/50-16 (84V)
Theoretical top speed @7000RPM = 311
Theoretical top speed @7000RPM = 299

@1olbull was closest

From posts above I have the following estimates provided, where 1 mile = 1.6093 Km:
RPM 2300 2750 3000 3000* 3200 3500 4000
MPH 65 70 75 80 88/85 96/93 111/106 ?
Kmh 104.60 112.65 120.70 128.74 142/137 155/150 178/171
RPM/Kmh 21.99 24.41 24.86 23.30 22.51/23.38 22.51/23.38 22.51/23.38

* estimate #2 for 3000 RPM

These figures would be affected by different rolling circumference of rear tire with variation even possible for same nominal size and profile rated tires. Dark side options would vary even more.

e.g. stock: AVON COBRA AV72 240/50-16 (84V)
0.94" increased diameter Bridgestone Exedra EA1R 240/55-16

240/50-R16 vs 240/55-R16 Tire Comparison - Tire Size Calculator | Tacoma World

240/50-16 240/55-16 Difference
Diameter inches (mm) 25.45 (646.4) 26.39 (670.4) 0.94 (24) 3.7%
Width inches (mm) 9.45 (240) 9.45 (240) 0 (0) 0%
Circum. inches (mm) 79.95 (2030.73) 82.92 (2106.12) 2.97 (75.4) 3.7%
Sidewall Height inches (mm) 4.72 (120) 5.2 (132) 0.47 (12) 10%
Revolutions per mile (km) 792.5 (492.43) 764.13 (474.81) -28.37 (-17.63) -3.6%

Speedometer Difference
Speedo Reading Actual Speed
20 mph (32.19 km/h) 20.74 mph (33.38 km/h)
25 mph (40.23 km/h) 25.93 mph (41.73 km/h)
30 mph (48.28 km/h) 31.11 mph (50.07 km/h)
35 mph (56.33 km/h) 36.3 mph (58.42 km/h)
40 mph (64.37 km/h) 41.49 mph (66.76 km/h)
45 mph (72.42 km/h) 46.67 mph (75.11 km/h)
50 mph (80.47 km/h) 51.86 mph (83.46 km/h)
55 mph (88.51 km/h) 57.04 mph (91.8 km/h)
60 mph (96.56 km/h) 62.23 mph (100.15 km/h)
65 mph (104.61 km/h) 67.41 mph (108.49 km/h)
Speedometer forum embed code:
Gear Ratio / RPMs for New Tire (@ 65 mph)
2.35 2.73 2.94 3.07 3.21 3.31 3.42 3.55 3.73 3.91 4.11 4.27 4.56 4.88 5.13 5.29 5.38 5.71 6.17 7.17
1945 2259 2433 2540 2656 2739 2830 2938 3086 3235 3401 3533 3773 4038 4245 4377 4452 4725 5105 5933

2004-2009 Std, Classic Manual Specifications:
5th 0.964:1 (27/28)
Secondary Drive Ratio 1.043:1 (48/46)
Final Drive Ratio 2.846:1 (37/13)

 

[mr hunt]

Can anyone guess I spent 23 years in the Australian Bureau of Statistics?

Not having a GPS speedo or riding my bike as I type could somebody confirm what the actual RPM per Kmh is in top gear? This is also affected by the angle of observation of the analog RPM and speed gauges


Only theoretically...atmospheric pressure, air temp, wind speed/direction blah blah blah...also the non-linear, variable-according -to -rpm- and- throttle -position, upto 6ish% reduction in overall mass proportional to diminishing fuel load all coupled with the philosophically sound universal syllogism positing the major premise that Red is the fastest colour preceding the minor premise that my bike is red leading to the logical conclusion that my red bike is faster than your whatever colour bike at any given rpm.

To reinforce the veracity of the above I also contend; baleese no returns

 

[Ishrub]

Only theoretically...atmospheric pressure, air temp, wind speed/direction blah blah blah...also the non-linear, variable-according -to -rpm- and- throttle -position, upto 6ish% reduction in overall mass proportional to diminishing fuel load all coupled with the philosophically sound universal syllogism positing the major premise that Red is the fastest colour preceding the minor premise that my bike is red leading to the logical conclusion that my red bike is faster than your whatever colour bike at any given rpm.

To reinforce the veracity of the above I also contend; baleese no returns

Que?

 

[grampi]

Can anyone guess I spent 23 years in the Australian Bureau of Statistics?

Not having a GPS speedo or riding my bike as I type could somebody confirm what the actual RPM per Kmh is in top gear? This is also affected by the angle of observation of the analog RPM and speed gauges

Calculated from data below:
2355 RPM @ 65Mph (104.60Kph) = 22.5143 RPM/Kph with Bridgestone Exedra EA1R 240/55-16
2445 RPM @ 65Mph (104.60Kph) = 23.3793 RPM/Kph with Stock tire AVON COBRA AV72 240/50-16 (84V)
Theoretical top speed @7000RPM = 311
Theoretical top speed @7000RPM = 299

@1olbull was closest

From posts above I have the following estimates provided, where 1 mile = 1.6093 Km:
RPM 2300 2750 3000 3000* 3200 3500 4000
MPH 65 70 75 80 88/85 96/93 111/106 ?
Kmh 104.60 112.65 120.70 128.74 142/137 155/150 178/171
RPM/Kmh 21.99 24.41 24.86 23.30 22.51/23.38 22.51/23.38 22.51/23.38

* estimate #2 for 3000 RPM

These figures would be affected by different rolling circumference of rear tire with variation even possible for same nominal size and profile rated tires. Dark side options would vary even more.

e.g. stock: AVON COBRA AV72 240/50-16 (84V)
0.94" increased diameter Bridgestone Exedra EA1R 240/55-16

240/50-R16 vs 240/55-R16 Tire Comparison - Tire Size Calculator | Tacoma World

240/50-16 240/55-16 Difference
Diameter inches (mm) 25.45 (646.4) 26.39 (670.4) 0.94 (24) 3.7%
Width inches (mm) 9.45 (240) 9.45 (240) 0 (0) 0%
Circum. inches (mm) 79.95 (2030.73) 82.92 (2106.12) 2.97 (75.4) 3.7%
Sidewall Height inches (mm) 4.72 (120) 5.2 (132) 0.47 (12) 10%
Revolutions per mile (km) 792.5 (492.43) 764.13 (474.81) -28.37 (-17.63) -3.6%

Speedometer Difference
Speedo Reading Actual Speed
20 mph (32.19 km/h) 20.74 mph (33.38 km/h)
25 mph (40.23 km/h) 25.93 mph (41.73 km/h)
30 mph (48.28 km/h) 31.11 mph (50.07 km/h)
35 mph (56.33 km/h) 36.3 mph (58.42 km/h)
40 mph (64.37 km/h) 41.49 mph (66.76 km/h)
45 mph (72.42 km/h) 46.67 mph (75.11 km/h)
50 mph (80.47 km/h) 51.86 mph (83.46 km/h)
55 mph (88.51 km/h) 57.04 mph (91.8 km/h)
60 mph (96.56 km/h) 62.23 mph (100.15 km/h)
65 mph (104.61 km/h) 67.41 mph (108.49 km/h)
Speedometer forum embed code:
Gear Ratio / RPMs for New Tire (@ 65 mph)
2.35 2.73 2.94 3.07 3.21 3.31 3.42 3.55 3.73 3.91 4.11 4.27 4.56 4.88 5.13 5.29 5.38 5.71 6.17 7.17
1945 2259 2433 2540 2656 2739 2830 2938 3086 3235 3401 3533 3773 4038 4245 4377 4452 4725 5105 5933

2004-2009 Std, Classic Manual Specifications:
5th 0.964:1 (27/28)
Secondary Drive Ratio 1.043:1 (48/46)
Final Drive Ratio 2.846:1 (37/13)

Looks like our speedos (speedometers, not swimming trunks) read a bit low, which is odd...most motorcycle speedos read high....those of us going to the 55 aspect ratio rear tire should be careful not to get caught speeding! Not that any of us would ever speed on this bike...