42 tooth rear sprocket - I like it! - Kawasaki Versys Forum
 
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post #1 of 14 (permalink) Old 12-14-2014, 02:27 PM Thread Starter
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42 tooth rear sprocket - I like it!

I installed a 42 tooth rear sprocket recently. The temperature got up to 55 yesterday so I took the girl out for a short sixty mile ride. I love the results! All my other bikes have fairly tall first gears so I guess I'm used to slipping the clutch a bit off the mark. On the interstate I'm guessing it dropped the revs by 600 rpm. 70 mph indicated shows right at 5000 rpm. Maybe it's not for everyone but I like it.
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post #2 of 14 (permalink) Old 12-14-2014, 04:42 PM
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Originally Posted by dppeter View Post
I installed a 42 tooth rear sprocket recently. The temperature got up to 55 yesterday so I took the girl out for a short sixty mile ride. I love the results! All my other bikes have fairly tall first gears so I guess I'm used to slipping the clutch a bit off the mark. On the interstate I'm guessing it dropped the revs by 600 rpm. 70 mph indicated shows right at 5000 rpm. Maybe it's not for everyone but I like it.
WOW I've got a 44 and like the reduced RPM's @ highway speeds, the 42 must be even better. It must be quite a slug in the lower RPM range with no chance of doing a wheelstand for sure.


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post #3 of 14 (permalink) Old 12-14-2014, 05:42 PM
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Regardless of the sprockets you use, your Versys will show 5000 rpm at 70 mph (in 6th gear), since the speedometer is driven off the output shaft.

You will get that reading if you take the chain and rear wheel off and run it up to 70 on a swingarm stand! (Not recommended.)
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post #4 of 14 (permalink) Old 12-14-2014, 05:47 PM
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Regardless of the sprockets you use, your Versys will show 5000 rpm at 70 mph (in 6th gear), since the speedometer is driven off the output shaft.

You will get that reading if you take the chain and rear wheel off and run it up to 70 on a swingarm stand! (Not recommended.)
I beg to differ.
When I changed from an OEM 46 tooth rear sprocket to a 44 tooth my RPM's DID CHANGE at various speeds.


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post #5 of 14 (permalink) Old 12-14-2014, 06:23 PM
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With the new final drive ratio the speedo will read closer to actual speed but the odo will now be off. I believe the tach reads from somehere else. So I have to throw in w/ Mr Alaska

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post #6 of 14 (permalink) Old 12-15-2014, 03:45 AM
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Originally Posted by dppeter View Post
I installed a 42 tooth rear sprocket recently. The temperature got up to 55 yesterday so I took the girl out for a short sixty mile ride. I love the results! All my other bikes have fairly tall first gears so I guess I'm used to slipping the clutch a bit off the mark. On the interstate I'm guessing it dropped the revs by 600 rpm. 70 mph indicated shows right at 5000 rpm. Maybe it's not for everyone but I like it.
42? That is tall and I believe taller than 16 front. Invader had a chart of ratio's on thread, rpm change at speeds with gearing. 44 closest to true so I understand from many gps guesstiments.





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post #7 of 14 (permalink) Old 12-15-2014, 05:50 AM
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Try: http://www.gearingcommander.com/

42T rear hmmm... very poor 'Same tooth - Same Link' stats...

43T rear might have been better

What's the chain adjustment like @42T ???
You'll be closer to the Max with a 114 link chain.

Last edited by Gigitt; 12-15-2014 at 05:55 AM.
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post #8 of 14 (permalink) Old 12-15-2014, 07:41 AM
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Who wants to ride on the interstate anyway? My versys is my farm roads touring bike. Set the GPS on shortest route, avoid highways and have a great adventure.

My Versys Travels:


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post #9 of 14 (permalink) Old 12-15-2014, 11:29 AM
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I beg to differ.
When I changed from an OEM 46 tooth rear sprocket to a 44 tooth my RPM's DID CHANGE at various speeds.
How are you measuring your speed? By a GPS unit or by your stock speedometer? They will give different readings when you put a 42 tooth on your bike. The GPS gives the most correct speed.

The speedometer will always show 70 mph at 5,000 rpm, because the speedometer is driven off the countershaft sprocket. But now you are actually traveling faster than 70 mph at 5,000 rpm, with a 42 tooth sprocket in back and a stock sprocket in front. Do the math, it works.
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post #10 of 14 (permalink) Old 12-15-2014, 12:49 PM Thread Starter
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Chain adjustment is darn near the max (all the way back) with a new stock length chain. At some point I will have to shorten it up a bit!
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post #11 of 14 (permalink) Old 12-15-2014, 05:29 PM
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Originally Posted by dppeter View Post
...70 mph indicated shows right at 5000 rpm. Maybe it's not for everyone but I like it.
...which is the SAME indication as stock....

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Originally Posted by trialsguy View Post
How are you measuring your speed? By a GPS unit or by your stock speedometer? They will give different readings when you put a 42 tooth on your bike. The GPS gives the most correct speed.

The speedometer will always show 70 mph at 5,000 rpm, because the speedometer is driven off the countershaft sprocket. But now you are actually traveling faster than 70 mph at 5,000 rpm, with a 42 tooth sprocket in back and a stock sprocket in front. Do the math, it works.
Like "trialsguy" said.... Watch it - you're going FASTER than your indicated now!

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post #12 of 14 (permalink) Old 12-15-2014, 09:16 PM
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Who wants to ride on the interstate anyway? My versys is my farm roads touring bike. Set the GPS on shortest route, avoid highways and have a great adventure.
shortest route? I'll agree with bypassing the slabs out there and heading straight to the twisties...That's the reason I got this bike..but I'll add as many twisty roads to that trip as I can possibly pack in the time allowed...the slabs around here ARE the shortest route...got to love Oregon...

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post #13 of 14 (permalink) Old 12-16-2014, 06:18 AM
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Chain adjustment is darn near the max (all the way back) with a new stock length chain. At some point I will have to shorten it up a bit!
If you like it that is awesome!

The only one I have tried is the 44t and I like it!





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post #14 of 14 (permalink) Old 12-16-2014, 04:34 PM Thread Starter
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If you like it that is awesome!

The only one I have tried is the 44t and I like it!
Thanks MTS. It's back into the twenties here so it might be a while before I get to ride her again!
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