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Old 03-01-2012, 06:49 PM   #1
BlueLghtning
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Default Dual Sport Gear Ratios - 5speed vs 6speed

I posted this in our Dual Sport thread, but I think its worth posting on its own as it might be some stuff you didn't expect.

I've copied this info from this ADV Thread where you can compare all the gear ratio's of your favorite bikes. Its really pretty interesting to see this all broken down into one list. Generally speaking, for dual sport wider ratio transmissions and having 6 gears usually works better because you get the low 1-2 gears for grunt work and a higher 5-6th gear for cruising. For smaller bikes though, you really want to have a wide gear range so you can make use of the power you have over a wide range of terrain. Sometimes a larger motor can make up for not having 6 gears, but nothing can make up when you have a very narrow range and want to play off road and enjoy cruising down the highway without the motor buzzing away underneath you.

For true dirt bikes where speed isn't really a concern, a narrow gearbox is usually favored as it always keeps you in the power band better, but makes it tough when you want to just go cruise the open road.

Here is the breakdown. There are some surprises in here.

Quote:
Originally Posted by montesa_vr View Post
New additions -- KLX250S, KTM690E

This list was getting too long, I've removed the 2-strokes, the trials bikes, and most of the bikes that were never sold as street legal. I have left the Honda XR650R on the list since it such a popular bike on this forum. You can find a more exhaustive list later in the thread.

The first number is the first gear ratio divided by the top gear ratio. The bigger the number, the wider the gear spread.

The number following the motorcycle name is what the actual overall low gear would be if gearing was raised until every motorcycle had the same ratio (5.05:1, or about what comes standard on a DR650 or KLR650) in high. Of course that caused all the first gear ratios to jump higher as well, so sorting by first gear, the lower the first gear ratio, the wider the overall gear spread.

Or put another way, if you replaced the sprockets on all these motorcycles so that they all had exactly the same gearing in high, this is how they would end up in first. The higher the number, the lower the gearing, and the wider the gear spread.

5.00 Montesa Cota 349 (6 speed) 25.25
4.97 Fantic 300 25.12
4.41 Yamaha TY250L 22.26
4.38 Yamaha DT175E (6 speed) 22.08
4.00 Honda TL250 (5 speed) 20.20
3.90 Yamaha XT225 (6 speed) 19.69 - (Widest gear ratio of most of the popular DS bikes)
3.82 Montesa V75 Enduro (5 speed) 19.29
3.80 Hercules 250 (7 speed) 19.19
3.78 Honda CRF230L (6 speed) 19.12 - (current widest ratio dual sport being made)
3.75 Suzuki DR125 (6 speed) 18.95
3.74 Can-Am 175 ASE 18.85
3.69 Montesa Enduro 360H (6 speed) 18.63
3.63 Kawasaki Sherpa 250 (6 speed) 18.30
3.54 Husqvarna 500XC 17.89
3.53 Suzuki RS175Z 17.85
3.53 Husqvarna 400WR 1984 17.82
3.53 Honda XR200R (6 speed) 17.81
3.51 Honda XR250R (6 speed) 17.69
3.47 Kawasaki KE125A5 (6 speed) 17.49
3.46 Yamaha XT250 2008 (5 speed) 17.50
3.45 Yamaha TW200 (5 speed) 17.43
3.45 Suzuki PE175D (6 speed) 17.42
3.40 Husqvarna TE610 (6 speed) 17.16 - The TE-610 is in the middle, but actually one of the better ones of all the big DS bikes. It has one of the best spaced 6 speed gear boxes with a low 1-2 and high 5-6 for cruising
3.40 Honda XR200R 1984 17.16
3.36 Yamaha WR250R/WR250X (6-speed) 16.99
3.32 Kawasaki KLR250 (6 speed) 16.76
3.29 Yamaha Tenere (5 speed) 16.61
3.27 BMW G650X (5 speed) 16.54
3.25 Pegaso 650 (5 speed) 16.41
3.19 Husqvarna 175XC 16.10
3.18 Kawasaki KDX200 (6 speed) 16.08
3.18 KTM 530 E/XC-R (6 speed) 16.07
3.18 Husaberg FE650E (6 speed) 16.07
3.18 Husaberg FE450/570 (6 speed) 16.07
3.18 Honda XR650L (5 speed) 16.07 - The XR650L is better than most, but unfortunately has a huge gap between 1st-2nd that almost makes it feel worse than the DR650
3.15 Kawasaki KLX250 (6 speed) 15.91
3.14 Yamaha IT200 (6 speed) 15.88
3.14 Honda XR350R (6 speed) 15.86
3.13 BMW F650GS (5 speed) 15.79
3.06 KTM 640 Adventure (5 speed) 15.44
3.04 KTM 950 (6 speed) 15.37
3.03 Yamaha XT500G (5 speed) 15.29
3.03 Suzuki DR350 (6 speed) 15.28 - The DR350 actually has a 6speed and way wider than the DRZ400 5sped transmission.
3.01 KTM 520 E/XC (6 speed) 15.16
2.93 Suzuki DR650 (5 speed) 14.77 - DR650 is pretty far down
2.88 Yamaha WR450 (5 speed) 14.52
2.88 KTM 690 (6 speed) 14.51
2.86 Kawasaki KLR650, KLX650 (5 speed) 14.42 - Another very popular bike that has a pretty narrow 5 speed. Makes it tough to gear it for both off road and highway at the same time.
2.82 Honda XR400 (5 speed) 14.27
2.80 BMW G450X (5 speed) 14.10
2.68 Kawasaki KLX450R (5 speed) 13.51
2.66 Honda XR650R (5 speed) 13.43
2.65 Suzuki DRZ400 (5 speed) 13.36 - DRZ400 near the bottom, Biggest flaw of the DRZ IMOP is its gear box
2.47 Aprilia RXV 550 (5 speed) 12.46
2.45 Husqvarna TE250 (6 speed) 12.40
2.21 Honda CR500R (5 speed) 11.17
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Last edited by BlueLghtning; 03-01-2012 at 06:53 PM.
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