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#995217 - 08/23/17 05:55 AM Shifting gears in the WB's  
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fastlarry Offline
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I hear a lot of complaints about the R1200XX transmissions, clunking into first while at a stop, clunky shift from 1st gear to 2nd and to a lesser degree 2nd to 3rd.
The clunk going into first at a stop is unavoidable, a characteristic of wet clutches. One can keep the bike in gear, holding the clutch in. 1st to 2nd I find is clunky if you try to make a fast shift out of it. If you lay back a bit let the engine revs drop a bit then the shift is much smoother. Must be something to do with ratios, e.g. a tall first. Most of the other upshifts are fine. Just a thought.


Larry
2016 BMW R1200RT
#995244 - 08/23/17 05:20 PM Re: Shifting gears in the WB's [Re: fastlarry]  
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JR356 Offline
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BMW known for clunky transmissions since the 1920's,both dry and wet clutch,although the newer wet clutch bikes do seem to shift better than prior versions.
Best to not be in a hurry when shifting,except with the newer shift assist equipped bikes.

JR356

Last edited by JR356; 08/23/17 05:21 PM.
#995250 - 08/23/17 06:02 PM Re: Shifting gears in the WB's [Re: JR356]  
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RecentConvert Offline
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I am in the camp of those believing BMW should outsources both the design and manufacturing of the transmissions in their wethead bikes. Simply outsourcing manufacturing is not enough, the best manufacturing won't fix a poor design.

#995263 - 08/23/17 07:31 PM Re: Shifting gears in the WB's [Re: RecentConvert]  
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Alfred02 Offline
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Originally Posted By: RecentConvert
I am in the camp of those believing BMW should outsources both the design and manufacturing of the transmissions in their wethead bikes. Simply outsourcing manufacturing is not enough, the best manufacturing won't fix a poor design.

I wrote a 2015 R1200RS while mine was in for service and it shifted absolutely perfect. No clunk at any stage, including clutch-less shifting and starting from stop in Neutral.
So they seem to exist.


BMW 2014 R1200RT-SE/LC
BMW 2005 R1200RT-SE (Traded in 03-2014)
BMW 2004 R1150RT (Traded in 02-2012)
#995267 - 08/23/17 08:33 PM Re: Shifting gears in the WB's [Re: Alfred02]  
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RecentConvert Offline
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Is that true for your 2014 RT also?

#995291 - 08/24/17 03:11 AM Re: Shifting gears in the WB's [Re: fastlarry]  
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fastlarry Offline
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Hard to outsource your tranny when it is integral to the engine. I think the airhead boxes were made by an outside vendor. To me in an overall marvelous package it is but a minor irritant.


Larry
2016 BMW R1200RT
#995312 - 08/24/17 01:54 PM Re: Shifting gears in the WB's [Re: fastlarry]  
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Paul De Offline
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Getrag on dry clutch machines, not sure about waterhead bikes. Getrag is one of the largest transmission manufacturers, they're in all kinds of stuff. It could still be a Getrag design in the waterhead but assembled by BMW.

In any case my 2015 K52 drive train shifts way better than my 1999 R259 drive train. My '99 shifted just like my 1971 /5 showing no progress in 28 years! Glad they finally did something if still not benchmark.


If the good old days were so damn good, why did we bother to invent modern times?

Most missed bike: Bultaco Sherpa T 326
#995420 - 08/25/17 08:00 PM Re: Shifting gears in the WB's [Re: Alfred02]  
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Limecreek Offline
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Originally Posted By: Alfred02
Originally Posted By: RecentConvert
I am in the camp of those believing BMW should outsources both the design and manufacturing of the transmissions in their wethead bikes. Simply outsourcing manufacturing is not enough, the best manufacturing won't fix a poor design.

I wrote a 2015 R1200RS while mine was in for service and it shifted absolutely perfect. No clunk at any stage, including clutch-less shifting and starting from stop in Neutral.
So they seem to exist.


Yup my RS shifts flawlessly. But I did take the time to adjust my shift lever as I've done with all my BMWs. That alone makes a huge difference.

Putting pressure on the lever prior to shifting that so many on this and other forums prescribe is not necessary and in fact risks damage or premature wear of the shift forks.

#995440 - 08/26/17 01:18 AM Re: Shifting gears in the WB's [Re: Limecreek]  
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Limecreek, When you say you've adjusted your shift lever/linkage, can you elaborate on this? Was this per the manual process and specs or to a different process and specs that can share with us?

Thanks,


____________
2004 R1150RT
#995451 - 08/26/17 05:53 AM Re: Shifting gears in the WB's [Re: fastlarry]  
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fastlarry Offline
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FYI there is: a 30% drop in engine speed from 1st to 2nd:
24% drop in engine speed from 2nd to 3rd
18% drop in engine speed from 3rd to 4th
11% drop in engine speed from 4th to 5th
10% drop in engine speed from 5th to 6 th

Those close ratios in the higher gears promote smooth quite shifting with or without Gear Shift Assistant. That 30% drop from 1st to 2nd promotes easy takeoff from stopping on an upward hill. You need that on a heavy road going bike, fully ladened. The gear ratios get closer as you shift up and so shifting become quiet and smooth. To make a smooth shift from 1st to 2nd you have to let the engine slow a little before making the shift. To shift down from 2nd to 1st blip the throttle a bit. Old school stuff.
I you had a close ratio box on a heavy road bike you'd have to slip the clutch getting it going. On a race/track bike this is acceptable. Now, if you had an engine that would produce adequate torque at idle you could use that to get away with a lower 1 st gear ration. Those engines aren't much fun at high speed.

These designs are a compromise and engineers work long and hard to make a workable package for all riders in all conditions. I hate hearing them get trashed in these forums by riders who haven't a clue what it takes to engineer such a package.

As you ride them more and work with the shifter and throttle you can gain a lot of smoothness, a much better alternative than frying the clutch.


Larry
2016 BMW R1200RT
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