What are YOUR Rpm's?
#31
I had a good look on the way home from work and mine's doing 3800rpm at 100kph. It pulls smoothly and hard enough for general overtaking still in sixth but for more fun or a smaller gap I knock it down a couple.
I don't believe that cruising along at low revs does any harm, and I'd say it'd just waste fuel cruising at 100kph in a lower gear.
However I'm a strong believer it giving it a regular handfull to blow out the cobwebs!
I don't believe that cruising along at low revs does any harm, and I'd say it'd just waste fuel cruising at 100kph in a lower gear.
However I'm a strong believer it giving it a regular handfull to blow out the cobwebs!
#32
#33
#34
Nope, I'm not Luis and I correct myself, turns out I have a 17/42 combo, this was my mistake:
Thought that number meant the tooths on the sprocket, but no, is this one:
Counted them and yeah, 42 is correct. Did the same with the front sprocket, 17 tooth.
Tested it this weekend with a digital speedo (measures up to 299km/h), wich is pretty much the same as a GPS in accuracy, using the tire outer diameter (at 36 psi) to calculate speed.
These are the results:
- Below 100 km/h (63 mph) both speedos show the same speed.
- Above 100 km/h (63 mph) the digital shows 5 km/h (3 mph) less than the analog.
- My guess is that the error increases above 200 km/h (125 mph) to about 7 mph or so.
- Tested tachometer in low gear, goes to 10.000 RPM with full throttle easily, so no error there.
- At 5000 RPM in 6th gear:
Analog speedo shows 160 km/h (100 mph)
Digital speedo shows 155 km/h (97 mph)
- Tested with my Kawasaki riding along with a friend of mine, both speedos showed the same speed at 120 km/h (75 mph) where the CBR shows 3600 RPM, and the GPZ 5500 RPM
I know measurements aren't 100% accurate, but I'm surprised that my bike is the only one doing 100mph at 5000 RPM, without any mods.
Thought that number meant the tooths on the sprocket, but no, is this one:
Counted them and yeah, 42 is correct. Did the same with the front sprocket, 17 tooth.
Tested it this weekend with a digital speedo (measures up to 299km/h), wich is pretty much the same as a GPS in accuracy, using the tire outer diameter (at 36 psi) to calculate speed.
These are the results:
- Below 100 km/h (63 mph) both speedos show the same speed.
- Above 100 km/h (63 mph) the digital shows 5 km/h (3 mph) less than the analog.
- My guess is that the error increases above 200 km/h (125 mph) to about 7 mph or so.
- Tested tachometer in low gear, goes to 10.000 RPM with full throttle easily, so no error there.
- At 5000 RPM in 6th gear:
Analog speedo shows 160 km/h (100 mph)
Digital speedo shows 155 km/h (97 mph)
- Tested with my Kawasaki riding along with a friend of mine, both speedos showed the same speed at 120 km/h (75 mph) where the CBR shows 3600 RPM, and the GPZ 5500 RPM
I know measurements aren't 100% accurate, but I'm surprised that my bike is the only one doing 100mph at 5000 RPM, without any mods.
Last edited by Daniel_ARG; 03-15-2009 at 09:03 AM.
#35
#37
#38
#39
Guest
Posts: n/a
Gawd ...4 pages so far on this my goodness
The std on 1000F's is 4000rpm at 100klms per hr (60mph) isn't it ?? , using std 42 X 17 tooth.. ( give or take a tiny bit for error )
BTW- my rule of thumb for gear speeds is ...
I try not to run her below 2,500 rpm at any time , (mostly 3000rpm min)
and ....I never go over 10,500 rpm in any gear
The std on 1000F's is 4000rpm at 100klms per hr (60mph) isn't it ?? , using std 42 X 17 tooth.. ( give or take a tiny bit for error )
BTW- my rule of thumb for gear speeds is ...
I try not to run her below 2,500 rpm at any time , (mostly 3000rpm min)
and ....I never go over 10,500 rpm in any gear
Last edited by CBRclassic; 03-17-2009 at 07:11 AM.