Why is my Versys so rough? - Kawasaki Versys Forum
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post #1 of 11 (permalink) Old 05-21-2012, 08:04 AM Thread Starter
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Why is my Versys so rough?

Have a 2004 Honda 919 which I can barely tell is running and accelerates smooth as butter. The Versys 650 I just bought is really rough on acceleration. Lumpy is the word I'd use. It's a 2009 with 300 miles, so may have sat for a while. Even at cruising I can't see out of the mirrors. Any ideas folks?
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post #2 of 11 (permalink) Old 05-21-2012, 08:20 AM
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Twins and fours have different power pulses...nature of the beast. The Versys is smooth as parallel twins go. Keep the revs above 4 grand where the motor likes to run.

Mirrors are a known issue, lots of inexpensive fixes. Try searching MIRRORS on the site and see what others have done to resolve the buzz.


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post #3 of 11 (permalink) Old 05-21-2012, 10:06 AM
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The vibratory nature of a twin cylinder motorcycle engine is not a problem... ... it's a feature!
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post #4 of 11 (permalink) Old 05-21-2012, 10:18 AM
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Check the vacuum sync in the throttle bodies. Mine (2010 with 7k miles) were waaay off, and a quick tweak made this feel like a totally new bike. I used to really try to avoid 6000 rpm or higher because it was so rough. Now, the fun just starts at 6k!

At the same time, I did the vacuum line mod (just connected the two together), but my feeling is that the proper sync made more difference than the mod.

Cheers, Jeff
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post #5 of 11 (permalink) Old 05-21-2012, 12:09 PM
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Originally Posted by Jeff S View Post
Check the vacuum sync in the throttle bodies. Mine (2010 with 7k miles) were waaay off, and a quick tweak made this feel like a totally new bike. I used to really try to avoid 6000 rpm or higher because it was so rough. Now, the fun just starts at 6k!

At the same time, I did the vacuum line mod (just connected the two together), but my feeling is that the proper sync made more difference than the mod.
+1

While the "roughness" is obviously subjective, gotta guess from your description that following what Jeff says above would be a big help.

I traded in my inline 4 FJR for my Versys. My experience is that it's not That Much rougher. Sure, it's a twin, you'll notice that, but it's really quite smooth for a twin.

Mine seems very smooth, but that may also be the way I broke it in. Clearly, when running up to almost red line, in a hurry, smooth as glass.

Last edited by AzItLies; 05-21-2012 at 12:19 PM.
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post #6 of 11 (permalink) Old 05-21-2012, 04:20 PM
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If the throttle body synch is off, one cyl is drawing more air than the other, it will increase the vibration although it should not be off on a new bike. Normally this gets done immediately after a valve adjustment.
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post #7 of 11 (permalink) Old 05-24-2012, 01:26 PM Thread Starter
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I am likely just spoiled by the 919 - being able to shift at 2k without fuss and tool around town at 2.5k rpm. I just need to think "Versys" on one and "Honda" on the other and rev them appropriatelly.
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post #8 of 11 (permalink) Old 05-24-2012, 10:39 PM
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Originally Posted by acewray View Post
I am likely just spoiled by the 919 - being able to shift at 2k without fuss and tool around town at 2.5k rpm. I just need to think "Versys" on one and "Honda" on the other and rev them appropriatelly.
Some people might say that one has character and one is like riding a sewing machine.

I'm not a big fan of I-4 bikes. You usually have to rev the snot out of them to have any fun, where the twins pull hard from the start. Of course that was before I got the Concours. That bike is amazing. Caught myself hitting 95 in second gear and another time 110 in 3rd. This was on a 45 MPH road. Eeek! I am learning to control it though so I don't get any tickets.

Of course the Versys gets up there pretty quick as well. Just takes a few more gears.

My Versys Travels:


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post #9 of 11 (permalink) Old 05-25-2012, 07:15 AM
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As the Guys mention, vacuum synch both throttle bodies at 1300 rpm.
After that, connect a tube between both the throttle bodies.

My V Blog:
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Ride safe,
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post #10 of 11 (permalink) Old 05-25-2012, 09:57 AM
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Quote:
Originally Posted by acewray View Post
I am likely just spoiled by the 919 - being able to shift at 2k without fuss and tool around town at 2.5k rpm. I just need to think "Versys" on one and "Honda" on the other and rev them appropriatelly.
The Versys really prefers to be reved up a bit.

Mine is its worse vibe/coarseness wise between 3500-4500, but smooths out significantly by 6000 and is a joy from 5500-8000.

It took me a while to get accustomed to revving it up as I am a bit of a lugger and most bikes I have/had before I rarely ran past 5000.

Now I rarely run the versys below 4000 unless I am off pavement.
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post #11 of 11 (permalink) Old 05-25-2012, 11:59 AM
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I'm convinced that each bike must be a bit different for whatever reason. I'm also sure that vibes smooth out over time for whatever reason. After 30,000 miles mine is pretty smooth. I thought I was just getting used to it but a buddy of mine road the bike and commented how smooth it was for a parallel twin.
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