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Trophy Trophy 3 & 4 - for all 900 and 1200cc models 1991- 2004

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Old 10-25-2012, 04:40 PM   #1 (permalink)
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Gear ratio

Hey All!

Guys chime in what gear ratios (sprockets) you have or currently run.
I'm thinking to go +2 front -1/2 rear to lower hi way RPM.
Thanks in advance.
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Old 10-25-2012, 08:35 PM   #2 (permalink)
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I believe you're moving the wrong way. You need to drop a tooth on front and/or drop a tooth in the back to drop revs @ speed.
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Old 10-25-2012, 10:33 PM   #3 (permalink)
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Originally Posted by Trophy4 View Post
I believe you're moving the wrong way. You need to drop a tooth on front and/or drop a tooth in the back to drop revs @ speed.
No, with out getting into combinations of counter shaft/drive sprocket ratios, adding teeth to the countershaft sprocket will drop revs per mph in all gears, as will dropping teeth on the drive sprocket.
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Old 10-26-2012, 12:45 AM   #4 (permalink)
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Biscuit is correct. Reducing the tooth count on the countershaft sprocket increases the numerical ratio (increasing the engine RPM for a given road speed), while reducing the tooth count on the drive sprocket reduces that ratio with a corresponding drop in RPM for a given speed.
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Old 10-29-2012, 11:14 AM   #5 (permalink)
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Quote:
Originally Posted by MidnightTrophy View Post
Hey All!

Guys chime in what gear ratios (sprockets) you have or currently run.
I'm thinking to go +2 front -1/2 rear to lower hi way RPM.
Thanks in advance.
Try my gearing calculator here.

You can play tunes with the sprockets.
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Old 10-30-2012, 06:11 AM   #6 (permalink)
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Guys we're going off track here.

DRIVEN(rear sprocket)
----------------------------- = FINAL RATIO
DRIVE(front sprocket)

Apply final ratio numerical figure to transmission ratio(s), you'll have individual gear final ratio.

The higher, numerically, tooth count on a DRIVEN gear, the higher the RPM at any given speed. The lower, numerically, tooth count on DRIVE gear, the higher RPM at any given speed.

But this is all irrelevant...All I was asking about the real experiences of having numerically different sprockets front/back...

Any real cases of "gear change" and how it affected your riding experience?


Cheers ...
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Old 10-31-2012, 03:01 AM   #7 (permalink)
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This doesn't help much, but from the digging I've done I'm going to try going with a 19/40 combo.
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Old 10-31-2012, 03:44 AM   #8 (permalink)
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I use 1200Trophy gearing on my 900 it works out to 4500rpm at 70mph which suits me really well it improved the fuel economy a little but for me because I was doing a fair amount of motorway riding, the drop in revs stopped the bike feeling buzzy.
It's a 19 tooth on the front. Can't remember the rear but it was whatever was stock for the 1200.

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Old 11-01-2012, 12:24 AM   #9 (permalink)
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Its been a bit of a toss up for me,I like the gearing Ive got on the bike on backroads,but then its revving 4 grand at 70 mph,it seems like a 1200 should be able to loaf along at 2500 rpm on the hiway.
But really,to pass quick the thing should be revving at 3500 or 4 grand to whoosh past cars,its a 4 cylinder and seems real smooth at 4 grand and still gets over 40 mpg doing so. Im not so sure gearing it way taller would help with mileage that much.
I do like the acceleration as the gearing is.

Guys who have geared it taller,does it get much better mileage?
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Old 11-01-2012, 10:23 PM   #10 (permalink)
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I think the stock gearing is the best over all for most conditions, at least where I live. Most of my riding is pretty curvy badly surfaced secondary roads with a lot of elevation changes. There is a lot of slowing down and speeding up. On some of these roads 50 to 60 mph is a good pace and with the stock ratios there is a minimum of back and forth shifting. The few times on a highway I think sure the revs could drop a lot and the bike could easily mantain speed, but the compromise would be less than ideal on the roads I usually ride. If most of my riding was out west with long sweeping 70,80,90mph roads I probably would add a tooth or two to my countershaft sprocket. But give your riding area and road type a serious look and don't change gearing just for change sake.
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