The CB1100 Community Forum

(03-31-2014, 10:10 AM)JetA_imp Wrote: [ -> ]My CB1100 deluxe:
70mph/ 6th gear/ 3250 RPM

Thats pretty low...

(03-31-2014, 10:02 AM)enzo_imp Wrote: [ -> ]Hey fellas, is the rpms and speed the same on both bikes at the gears 1 to 5? or have they also changed on the 14 model.
Who are U calling Squid.....

Enzo, since Honda changed the rear sprocket a tooth that changes all the gear ratios somewhat. Honda said 1 thru 5 remained the same and that 6 th gear was an overdrive, but somehow the gear ratios on 1-5 changed..although maybe not in relation to each other if that makes sense.

To put it simply any given speed in any given gear will not register the same on the 13s and 14s. All the 14s will register the same, std and deluxe, but they will be different than the 13s.

Clear as mud?

My peanut butter is smoother and spreads faster than your peanut butter....

Nipping this in the bud. Deleted the last 3 posts. Change the subject fellas.

(03-31-2014, 06:01 AM)calamarichris_imp Wrote: [ -> ]

(03-31-2014, 05:46 AM)Deanohh_imp Wrote: [ -> ]You should forget the Speedo "correction" . The Speedo reads the rear wheel rotation speed on these, independent of the gears, or sprockets. A different tire diameter would make a difference.

Really? That's bizarre. It would be so much simpler & easier to get it from the crankshaft rotation rather than the rear wheel.

Really? That's bizarre. It would be so much simpler & easier to get it from the crankshaft rotation rather than the rear wheel.
I don't know if you are trying to push buttons or really this dense. LOL!

What would it do if you put the bike in neutral? Estimate?

It would also have to know what gear you are in at all times and switch the ratio accordingly. Ground speed is MUCH easier done using wheel speed.

A lot of bikes have a gearbox sensor that I think reads output shaft speed.... That could be what he meant. But nowdays with abs so popular and probably becoming mandatory, it makes perfect sense to use the rear wheel abs components for the speedo signal so you don't need another Speedo system. And on a abs bike the wheel speed sensors are part of it so you get a feed to the Speedo for free.

(04-01-2014, 10:27 AM)Deanohh_imp Wrote: [ -> ]A lot of bikes have a gearbox sensor that I think reads output shaft speed.... That could be what he meant. But nowdays with abs so popular and probably becoming mandatory, it makes perfect sense to use the rear wheel abs components for the speedo signal so you don't need another Speedo system. And on a abs bike the wheel speed sensors are part of it so you get a feed to the Speedo for free.

Understood. However, on a motorcycle, wheel speed and output shaft speed are perfectly correlated and a sensor at either location would function. I am guessing that it is easier to sense speed on a cool, dry location (ie. hub).

Talking about getting pasted..........ok I've got another Q.
Assuming all pre 14th models are the same and the speed is picked up at the back hub.
Is the computer calculating the miles into kilometres or the kilometres into miles......
or is all nuts getting calculated into Miles and Kilometres.
and if I'm correct UK miles are different again.

I've been paying closer attention to speed and rpm the last few days, and have drawn some conclusions.

The '13 turns the following rpm in 5th gear:

3400 rpm at 60 mph
3700 rpm at 65 mph
4000 rpm at 70 mph
4300 rpm at 75 mph
4600 rpm at 80 mph

These are approximated since the tachometer shows increments of 2500 rpm. 70 mph is straight up 4000 rpm, this is known. All one needs to do is calculate the speed per 1000 rpm using 70 mph at 4000 rpm. 70 divided by 4 is 17.5. The bike does 17.5 mph per 1000 rpm. With this information, I watched the instruments closer to see if it all matches up, it does.

The bike is geared a little low for some tastes, however, it is less than halfway to the redline at 70 mph. My usual cruising speed on the freeway is 70-75 mph. At those speeds the bike is quite smooth, very torquey, and has a strong top gear roll-on. Those are very good qualities to have on the freeways around here.

I would love to have the overdrive for long road trips, for sure. One option for those that want higher gearing is to replace the front or rear sprocket with a 19 tooth front or a 37 tooth rear. Either one or the other would result in 400 less rpm at any given speed, in each gear. 70 mph in 5th gear would be 3600 rpm, 75 mph would be 3900 rpm, this would be a nice ratio for highway speeds.

Trouble is, I don't think anyone offers these sprocket sizes, I haven't found them anywhere. If/when they become available, I may do this. If not, I'm good with the way it is.

Cheers

(04-01-2014, 11:19 AM)enzo_imp Wrote: [ -> ]Talking about getting pasted..........ok I've got another Q.
Assuming all pre 14th models are the same and the speed is picked up at the back hub.
Is the computer calculating the miles into kilometres or the kilometres into miles......
or is all nuts getting calculated into Miles and Kilometres.
and if I'm correct UK miles are different again.

I would assume that the calculations are set according to the Country that the bike is intended for. Probably can be set, or changed rather simply. Maybe a function of the ECU, can be switched with a laptop and a USB cable, if one has the necessary software.

I don't know this, but that would be my guess.

Cheers

(04-01-2014, 11:19 AM)enzo_imp Wrote: [ -> ]Talking about getting pasted..........ok I've got another Q.
Assuming all pre 14th models are the same and the speed is picked up at the back hub.
Is the computer calculating the miles into kilometres or the kilometres into miles......
or is all nuts getting calculated into Miles and Kilometres.
and if I'm correct UK miles are different again.

Enzo, I think a mile is a mile is a mile (except when it's a nautical mile or a US Survey Mile). So the sensor's work has to be converted only into KPH or MPH.

Gallons, now, that's a different thing altogether.

Actually, writing this has made me look again at my fuel usage and feel better about it. Having grown up on Imperial measurement, I've never quite grasped metrics. So, I've worked out that the CB is averaging 55.64 Miles/imperial gallon which is not too bad. That's 46.33 miles/US Gallon or 19.58 kms/litre. HOwever, for some reason that I don't understand, Australia insists on measuring fuel usage as litres per 100 kms. The CB does an average of 5.12 of them.

To make it relevant: I suppose if I had a 6th gear I could improve that performance a bit.