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Engine runs hard on interstate

  • Thread starter Thread starter hoppy1
  • Start date Start date
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hoppy1

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Hi everyone, when I ride my 850 on the Interstate, it seem that the engine is really running hard. Is this Ok? At 60 mph, the engine is running around 4500rpm. At 70, it's a little over 5000,but the engine sounds like it is screeming. Thanks, Mark
 
Normal.

Installing a 2.90 final drive will drop the rpm's a little. I did that on one bike and liked the change.

 
hoppy1 said:
Hi everyone, when I ride my 850 on the Interstate, it seem that the engine is really running hard. Is this Ok? At 60 mph, the engine is running around 4500rpm. At 70, it's a little over 5000,but the engine sounds like it is screeming. Thanks, Mark
Click to expand...
I suspect your tach is reading a little higher than it should. At 55 mph mine reads about 4,200~4,300.

Yes it's ok...
 
You should hear it scream when you don't let the revs drop below 6,000!

Check out a dyno chart for your engine, you'd be surprised where your bike makes all its' power.

Keeping rpms at or below 5,000 is like having a nice big swimming pool but only ever using the shallow end.
 
its annoying, but it won't hurt anything. Well synchronized carbs and and a valve adjustment makes it smoother, but a 1000 or 1100 is more relaxed at speed.
 
These engines are tiny and designed for high RPM power, they need to spin fast to run efficiently.
 
Hi,

My GS850GT runs at 70 mph, 5000 rpm all day long and it's very happy. :D

Just keep up all the maintenance, valve adjustments, fluids, filters, etc, and you'll have no worries.


Thank you for your indulgence,

BassCliff
 
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