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What Makes The 650 Engine A "Gem"?

3887 Views 32 Replies 20 Participants Last post by  murrayjestin
I hear this a lot but I know next to nothing about engines and mechanical stuff. What exactly makes the 650 engine so great? I know about its reliability but what else? And does the 1000 & 1050 get the same praise because I've never seen those described as a "gem". Then again, I don't read much about those bikes.

I've had a 2020 650 since last September and yeah I like it. Realistically, it has all the power I need. It's so much more practical than my previous bikes which are a 2019 HD Low Rider & a 2018 Honda Shadow Phantom (750 engine). However, I am extremely tempted to trade in the V-Strom for another Harley, not because the V-Strom is bad in any way but I really miss my dearly departed Low Rider which was killed in a rear-end hit & run.
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Because a twin 650 runs smoother than a twin 1000. Smaller bores with less reciprocating mass.

Similarly, an in-line four 1000 is smoother than a twin 1000.
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And a V-Twin generally smoother too....
I see. It certainly does feel like a smooth-operating machine...except for when the shifting gets...jerky. I still haven't figured that out after all this time but then again, I've never really looked much into it. I guess that doesn't really have anything to do with the engine itself anyway.
Plus being a 90 degree v-twin gives it perfect primary balance. I know this applies to both the Vee and Wee but smaller pistons and stroke on the Wee will make it feel sweeter.
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Plus being a 90 degree v-twin gives it perfect primary balance. I know this applies to both the Vee and Wee but smaller pistons and stroke on the Wee will make it feel sweeter.
What is primary balance?
If you are not doing so, try running full synthetic in your engine.
Certainly smoothed out my shifting.
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If you are not doing so, try running full synthetic in your engine.
Certainly smoothed out my shifting.
I'm not sure what was in there when I got the bike but I changed the oil last month with full synthetic. The shifting is still a little rough at times.
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I see. It certainly does feel like a smooth-operating machine...except for when the shifting gets...jerky. I still haven't figured that out after all this time but then again, I've never really looked much into it. I guess that doesn't really have anything to do with the engine itself anyway.
Try not fully shutting the throttle when changing gears, that should smooth things out.
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If you typically wear heavy boots, put some sneakers on and do a few laps somewhere where an accident is really unlikely. In my case at least the occasional harsh change is due to the boots I wear.
The 1000+ seems to have much more torque. Only thing I liked about it.

650 gets much better fuel mileage. And is fast enough for most.
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Try not fully shutting the throttle when changing gears, that should smooth things out.
Thanks, I'll try that.
You can also preload the shifter, then when you pull in the clutch a bit (no need to fully pull it in) while decreasing throttle it will slot into the next gear smoother.
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I think my 2016 1000 engine is a gem ;)
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So far IMO...smooth, quiet, broad torque. Good power and pulls hard down low for a 650.
Complicated, but probably still a gem if it lasts.
The 650 engine has a very linear power band. That and lack of vibration make it run "sewing machine" smooth.

The motor is the best feature of the 650 fer sure.
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I think my 2016 1000 engine is a gem ;)
+1

I much prefer the motor in my 2014 1000 and the bike in general over my 2012 650.
You do want to keep the revs up in the twists on the 650...in the powerband it's a sweet bike. Many fond memories.
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