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Offline Kamboskid

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Re: changing cogs, front or back
« Reply #10 on: 14 August, 2019, 07:56:18 AM »
 Thanks for the feedback and the tech info. It seems to confirm my thoughts about the gearing,there is room for some improvement,the Speedo and better mpg are  good benefits too! Going away September to the Italian and Austrian Alps so feel the standard gearing may be more sensible but the torque going uphill is amazing in any gear above 2000rpm! First have to take care of my charging iss ues that have come to the surface on this current trip,looks like the generator and flywheel have failed. Bike has only done 20k since 2007!

Offline raYzerman

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Re: changing cogs, front or back
« Reply #11 on: 23 August, 2019, 12:40:26 AM »
Well after reading all the comments, I am going to stick with the 16T front sprocket and notch down to a 42T on the rear instead.  I want to retain lower end power but take the edge of the high rpms at cruising.  According the calculations, I am right in between...... equivalent of a 16.5 tooth front sprocket if you will.... I'll install likely near the end of September and report.
What I ordered is a JTR-302.42 (1992-95 CBR900 fitment is same).
« Last Edit: 23 August, 2019, 12:42:47 AM by raYzerman »

Offline Art

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Re: changing cogs, front or back
« Reply #12 on: 23 August, 2019, 10:37:38 AM »
That may be the sensible option if your in the Honda had the gearing optimised at 16 x 43 camp. Sometimes less is more. Would be interested to hear what correction it makes to the speedo and at what RPM's 50 and 70 MPH is reached.
« Last Edit: 23 August, 2019, 10:40:45 AM by Art »

Offline raYzerman

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Re: changing cogs, front or back
« Reply #13 on: 25 August, 2019, 02:33:42 AM »
Art, what I did was use the website referred to below, it shows the stock gearing and speeds.  I was more interested in 3500 and up rpm ranges, mainly what speed I was doing at 5000 where my buzz occurs... 100 kph plus usually 20 won't get me bad paper.  I know there is buzz above that, but it starts just at/under 5000..  Everyone's input has been helpful, thanks all.
Plugged in the 17/43 combo in "Custom", then in the next box below, enter 3500 or 4000 rpm in the left box and press the Custom button, displays the various speeds.  Did the same for 16/42 and thought that would take away most of my buzz concerns.  Not that it's bad, just would rather stay south of it a tad, and not affect performance as much as 17/43 would.  So, we'll give it a go, I found JT sprockets in the UK cheaper to my door than ordering here.  They are on the way.

https://www.gearingcommander.com/

Offline Eh2zed

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Re: changing cogs, front or back
« Reply #14 on: 18 October, 2019, 10:15:49 PM »
*Originally Posted by Rev Ken [+]
I now understand! My son has a (Tuned!) Blackbird and now has my CBF1000 which he refers to as his 'moped'. However it is ridden a lot more than the Blackbird, and often two up, something the Blackbird isn't as practical. Horses for courses! :031:

I had a Blackbird for ten years and loved it except for the overheating. Now I have a Biffer and I know I’m an old fart now but I like it better. The riding position favours me and it has plenty of juice for us even 2 up.
In fact I just ordered a new chain and sprockets and stayed with the 16/43 setup.
Note: The order is coming from England and even with shipping it’s about half the cost of OEM parts from the local Honda dealer.

Offline Art

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Re: changing cogs, front or back
« Reply #15 on: 19 October, 2019, 03:51:23 PM »
I'm currently running the Wemoto's £84.95 sprocket and chain kit comprising DID530VX G&B12ZB chain, JTF333.16 front sprocket, JTR302.43 rear sprocket. On the plus side I've notched up 26,000 miles without out issue and without any fancy pants chain oiler system. Note to that's some way ahead of the Honda stock factory fitted chain and sprockets that only managed 20,000 miles. The only down side being there's not enough wear to replace it with a 17/43 set up yet.

Offline Paul-D

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Re: changing cogs, front or back
« Reply #16 on: 24 October, 2019, 07:59:02 AM »
*Originally Posted by Westoneboy [+]
Maybe it's because I have riden a blackbird for the last 14 years . I do love my CBF but it is slow on the overtake  compared to most 1 litre machines but if fast enough for you fare comment.

Hmm... Of course, it's all relative, but comparing my CBF1000F to my previous bike, a Tuono Gen1 with 115bhp at the rear wheel, and so much torque it pulled like a steam train:
- If you compare in gear acceleration, 30mph to 60mph, and 40mph to 70mph, in 3rd, 4th and 5th gear, the CBF was either as fast, or in most cases a few points of a second faster! 
- At 3k rpm the CBF developed twice the torque of the Tuono.
- The Tuono was faster but only if you drop down the gears and get the revs up to 7k rpm and above.

All things considered, the CBF (MK2) is relatively good at acceleration in gear.  It can very easily overtake cars with only one drop in the gears. 

I loved my hooligan Tuono, and kept it 5yrs, longer than any other bike I've had.  But the CBF (MK2) is more versatile, and has an even wider torque band.  In fact, there is good reports that it will readily pull away in 4th gear (and some say 6th gear!) from standstill, though haven't tried that yet.  The Tuono wouldn't ride below 30mph in anything more than 1st gear without jerking and chain slap!

But I think the problem lies in comparing it to a Blackbird, which was the fastest bike on the road for a while!   :002:

« Last Edit: 24 October, 2019, 08:04:05 AM by Paul-D »