Author Topic: Gearing Tall (Read 8971 times)

ari211 · « **on:** March 14, 2006, 09:31:19 PM »

Hello Yall.

Im a newbie, and glad to join!

I just posted my question but I think I may have done it in the wrong area.
Has anyone geared up their bikes for extended highway riding. I want to haul ass back to Cape Cod Ma from San Diego and I feel bad holding my bike at 7000 all day.

Another question: anyone out there with a 600 wheelying the thing, or is that strictly for the big boys?

flip · « **Reply #1 on:** March 15, 2006, 12:01:22 AM »

I'm running a 16 tooth front sprocket on my 96 b6. That lowered the rpm's by about 300 at 60mph. I'm going to put a 46 tooth sprocket on the back when I replace my chain. That will knock off about 200 rpm's at 60 mph. My front wheel does come up when accelerating but not very high.

SHREDDER · « **Reply #2 on:** March 15, 2006, 02:40:33 AM »

That's perfectly normal for a B6 to rev high at those speeds. A few years back I rode my B6 from San Francisco to NJ in 4 days with the stock sprockets and it did just fine. Putting in a taller gearing may force you to sacrifice things like off the line acceleration and top end roll on. I noticed your from Truro, I head up there once or twice a year for striper fishing what a great place!

chupacabra · « **Reply #3 on:** March 15, 2006, 07:08:34 AM »

My 6 wheelies nice and I don't even have to clutch it!
I have a 50 on the back...lol.

tacoman · « **Reply #4 on:** March 15, 2006, 02:13:59 PM »

Do you have a jet kit/ignition advancer in? After I did the stage one mod on my B6 first gear was worthless. I could cruise around town in 6th. I went up one tooth on the front and dropped two in the rear. I think its a lot better. It doesn't have the jump taking off from a standstill but once underway its fine.

ari211 · « **Reply #5 on:** March 15, 2006, 05:14:24 PM »

Cool guys, thanks for the replies.
As of yet I haven't modified a damn thing, I was too busy riding it. But after reading about all the suspension upgrades available at moderate prices (and realizing how crappy my stock stuff is anyway) im going to start in on that.

ari211 · « **Reply #6 on:** March 15, 2006, 05:32:40 PM »

With stock gearing I cruise an indicated 80 mph at about 6,500 rpm. If I wanted to go 80 and only be turning 5,800-6,000, what size sprockets front and rear would I need?

Bob Holland · « **Reply #7 on:** March 15, 2006, 10:12:25 PM »

This is stock gearing for the Bandit 1200
INPUTS 1998 GSF1200S Bandit Gearing Calculator
Front Sprocket (Teeth) 15
Rear Sprocket (Teeth) 45
Final Ratio 3.00
Primary Ratio 1.565
Rear Tire Diameter (inches) 24.79
Tire Circumference (Inches) 77.88
GEAR 1 2 3 4 5
Internal Gear Ratio 2.384 1.631 1.250 1.045 0.913
Overall Gear Ratio 11.193 7.658 5.869 4.906 4.287
RPM MPH MPH MPH MPH MPH
1,500 9.9 14.4 18.8 22.5 25.8
2,000 13.2 19.3 25.1 30.1 34.4
2,500 16.5 24.1 31.4 37.6 43.0
3,000 19.8 28.9 37.7 45.1 51.6
3,500 23.1 33.7 44.0 52.6 60.2
4,000 26.4 38.5 50.3 60.1 68.8
4,500 29.7 43.3 56.5 67.6 77.4
5,000 32.9 48.2 62.8 75.2 86.0
5,500 36.2 53.0 69.1 82.7 94.6
6,000 39.5 57.8 75.4 90.2 103.2
6,500 42.8 62.6 81.7 97.7 111.8
7,000 46.1 67.4 88.0 105.2 120.4
7,100 46.8 68.4 89.2 106.7 122.2
7,200 47.4 69.3 90.5 108.2 123.9
7,300 48.1 70.3 91.7 109.7 125.6
7,400 48.8 71.3 93.0 111.2 127.3
7,500 49.4 72.2 94.2 112.7 129.0
7,600 50.1 73.2 95.5 114.2 130.8
7,700 50.7 74.2 96.8 115.7 132.5
7,800 51.4 75.1 98.0 117.2 134.2
7,900 52.1 76.1 99.3 118.8 135.9
8,000 52.7 77.0 100.5 120.3 137.6
8,100 53.4 78.0 101.8 121.8 139.4
8,200 54.0 79.0 103.0 123.3 141.1
8,300 54.7 79.9 104.3 124.8 142.8
8,400 55.3 80.9 105.6 126.3 144.5
8,500 56.0 81.9 106.8 127.8 146.2
8,600 56.7 82.8 108.1 129.3 148.0
8,700 57.3 83.8 109.3 130.8 149.7
8,800 58.0 84.8 110.6 132.3 151.4
8,900 58.6 85.7 111.8 133.8 153.1
9,000 59.3 86.7 113.1 135.3 154.8
9,100 60.0 87.6 114.4 136.8 156.6
9,200 60.6 88.6 115.6 138.3 158.3
9,300 61.3 89.6 116.9 139.8 160.0
9,400 61.9 90.5 118.1 141.3 161.7
9,500 62.6 91.5 119.4 142.8 163.4
9,600 63.3 92.5 120.6 144.3 165.2
9,700 63.9 93.4 121.9 145.8 166.9
9,800 64.6 94.4 123.2 147.3 168.6
9,900 65.2 95.3 124.4 148.8 170.3
10,000 65.9 96.3 125.7 150.3 172.1
10,100 66.5 97.3 126.9 151.8 173.8
10,200 67.2 98.2 128.2 153.3 175.5
10,300 67.9 99.2 129.4 154.8 177.2
10,400 68.5 100.2 130.7 156.3 178.9
10,500 69.2 101.1 131.9 157.8 180.7

Bob Holland · « **Reply #8 on:** March 15, 2006, 10:22:08 PM »

This is for the 600, tire size will make a difference

INPUTS GSF600 Bandit Gearing Calculator
Front Sprocket (Teeth) 15
Rear Sprocket (Teeth) 48
Final Ratio 3.20
Primary Ratio 1.744
Rear Tire Diameter (inches) 24.79
Tire Circumference (Inches) 77.88
GEAR 1 2 3 4 5 6
Internal Gear Ratio 3.083 2.062 1.647 1.400 1.227 1.095
Overall Gear Ratio 17.206 11.508 9.192 7.813 6.848 6.111
RPM MPH MPH MPH MPH MPH MPH
1,500 6.4 9.6 12.0 14.2 16.2 18.1
2,000 8.6 12.8 16.0 18.9 21.5 24.1
2,500 10.7 16.0 20.1 23.6 26.9 30.2
3,000 12.9 19.2 24.1 28.3 32.3 36.2
3,500 15.0 22.4 28.1 33.0 37.7 42.2
4,000 17.1 25.6 32.1 37.8 43.1 48.3
4,500 19.3 28.8 36.1 42.5 48.5 54.3
5,000 21.4 32.0 40.1 47.2 53.9 60.3
5,500 23.6 35.2 44.1 51.9 59.2 66.4
6,000 25.7 38.5 48.1 56.6 64.6 72.4
6,500 27.9 41.7 52.2 61.4 70.0 78.4
7,000 30.0 44.9 56.2 66.1 75.4 84.5
7,100 30.4 45.5 57.0 67.0 76.5 85.7
7,200 30.9 46.1 57.8 68.0 77.5 86.9
7,300 31.3 46.8 58.6 68.9 78.6 88.1
7,400 31.7 47.4 59.4 69.9 79.7 89.3
7,500 32.1 48.1 60.2 70.8 80.8 90.5
7,600 32.6 48.7 61.0 71.7 81.9 91.7
7,700 33.0 49.3 61.8 72.7 82.9 92.9
7,800 33.4 50.0 62.6 73.6 84.0 94.1
7,900 33.9 50.6 63.4 74.6 85.1 95.3
8,000 34.3 51.3 64.2 75.5 86.2 96.5
8,100 34.7 51.9 65.0 76.5 87.2 97.8
8,200 35.1 52.6 65.8 77.4 88.3 99.0
8,300 35.6 53.2 66.6 78.3 89.4 100.2
8,400 36.0 53.8 67.4 79.3 90.5 101.4
8,500 36.4 54.5 68.2 80.2 91.5 102.6
8,600 36.9 55.1 69.0 81.2 92.6 103.8
8,700 37.3 55.8 69.8 82.1 93.7 105.0
8,800 37.7 56.4 70.6 83.1 94.8 106.2
8,900 38.1 57.0 71.4 84.0 95.9 107.4
9,000 38.6 57.7 72.2 85.0 96.9 108.6
9,100 39.0 58.3 73.0 85.9 98.0 109.8
9,200 39.4 59.0 73.8 86.8 99.1 111.0
9,300 39.9 59.6 74.6 87.8 100.2 112.2
9,400 40.3 60.2 75.4 88.7 101.2 113.4
9,500 40.7 60.9 76.2 89.7 102.3 114.7
9,600 41.1 61.5 77.0 90.6 103.4 115.9
9,700 41.6 62.2 77.8 91.6 104.5 117.1
9,800 42.0 62.8 78.6 92.5 105.5 118.3
9,900 42.4 63.4 79.4 93.4 106.6 119.5
10,000 42.9 64.1 80.2 94.4 107.7 120.7
10,100 43.3 64.7 81.0 95.3 108.8 121.9
10,200 43.7 65.4 81.8 96.3 109.9 123.1
10,300 44.2 66.0 82.6 97.2 110.9 124.3
10,400 44.6 66.7 83.4 98.2 112.0 125.5
10,500 45.0 67.3 84.2 99.1 113.1 126.7
10,600 45.4 67.9 85.1 100.1 114.2 127.9
10,700 45.9 68.6 85.9 101.0 115.2 129.1
10,800 46.3 69.2 86.7 101.9 116.3 130.3
10,900 46.7 69.9 87.5 102.9 117.4 131.5
11,000 47.2 70.5 88.3 103.8 118.5 132.8
11,100 47.6 71.1 89.1 104.8 119.5 134.0

ari211 · « **Reply #9 on:** March 16, 2006, 03:10:44 PM »

Hey BHolland, thanks for the hard data. On that 600 chart, is the back tire a stock size? And where did you find that calculator? Thanks.

Ari

Bob Holland · « **Reply #10 on:** March 17, 2006, 09:30:58 PM »

http://www.nightrider.com/biketech/calc_speed_rpm.htm

Go to this site for the tire size calculater.
The gear ratio calculater is one I downloaded a few years ago, and modified it for the bandits. It is just an excel file.

ATC'er · « **Reply #11 on:** May 03, 2006, 08:09:34 PM »

Am I reading this correctly for the 1200? 101 mph in second gear? That's good to know, because I shift down into third on the highway when I'm looking to make a point with a cager.

Bob Holland · « **Reply #12 on:** May 03, 2006, 09:11:47 PM »

It is 101, if your bike will turn 10,500 rpms. I don't think stock engines make good horsepower past 9,500, but a set of GSXR cams will put you in the 10,500 range.

ATC'er · « **Reply #13 on:** May 03, 2006, 09:57:52 PM »

Good point. Guess what I should've said is that if I'm cruising on the highway at 65 mph, I should maybe try shifting into second instead of third. The gearing calculator shows the engine turning at around 6800 rpms in second at 65 mph. Third gear at the same speed is showing 5300 rpms. I was always afraid that putting it into second gear at that speed would over rev the engine.

2005B12S · « **Reply #14 on:** May 04, 2006, 01:27:30 AM »

Buy a spare cush drive and bolt up a 43 tooth rear sprocket. Switching between drives is a 15 minute affair without having to bolt up sprockets. Once the rear wheel is off swapping the sprocket assembly is easy and takes about 2 minutes.

I used to swap gearing as described on my GS750 when commuting betwwen college and home (300 miles) back in the '80's. A 43 tooth rear will drop the rpm in top gear nicely on the highway without sacfificing too much low end.

Good Luck, Ed.
2005 GSF1200SZ
1992 900SS
1983 GS750ED