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post #1 of 20 (permalink) Old 10-23-2011, 10:06 PM Thread Starter
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rpm question

Another new rider question my bike is running around 4500 rpms on the freeway (65mph) is that normal.

Thanks
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post #2 of 20 (permalink) Old 10-23-2011, 10:17 PM
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Yes, the RPM's are correct. These engines are designed for higher Rpm's while cruising. At that RPM you should be getting better than 45 mpg on long runs if the engine is tuned right.
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post #3 of 20 (permalink) Old 10-24-2011, 12:04 AM Thread Starter
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post #4 of 20 (permalink) Old 10-24-2011, 06:46 AM
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bear,

That is what my vulcan cranks out at 60-65 mph. Also have an old 82 Maxim that pulls about 6k at 60 mph, and it will do that all day long. These bikes are designed to run at higher rpms, very different from cars. now when you start to pull 5500 rpms at 70-75 mph, now we are talkin!!!

Kevin
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post #5 of 20 (permalink) Old 10-24-2011, 10:23 PM
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Quote:
Originally Posted by bearsfan View Post
Another new rider question my bike is running around 4500 rpms on the freeway (65mph) is that normal.

Thanks
The gearing ratios in 5th gear give the vn750 ~14.5 mph per 1,000 RPM.
14.5 mph X 4.5 ~ 65.5 mph. Your numbers are right on.

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post #6 of 20 (permalink) Old 10-25-2011, 10:04 AM
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Yup. it's correct. Main reason I bought my Meanstreak. I did 65 miles a day on the highway and REALLY needed a lower revving motor. The Meanie is 3750rpm at 75 mph, normal commuting speed.

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post #7 of 20 (permalink) Old 10-25-2011, 10:25 AM
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I'm doing 80mph at 4000 rpms on my Feejer. Redline is 9,000.


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post #8 of 20 (permalink) Old 10-25-2011, 11:45 AM
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Mine does exactly 60 mph at 4000. And at that speed, I get mileage in the high 40s. But here in AZ the speed limit on freeways is 75, so I ride an indicated 80 mph, which is right on an actual 75. At that speed, fuel consumption goes up dramatically, and I get about 35 mpg. The high RPMs don't really bother me, but they can make you (me) feel a sense of urgency for some reason, which makes it a bit harder to relax. My Goldwing has the same feel at lower RPMs. It feels like it is turning faster than it is. The Harley on the other hand runs just over 3,000 rpm at an indicated 80, you can almost count the power pulses. IMO, it does not vibrate nearly as bad at that speed as most people claim. I still have all my fillings. It is a rubber mounted EVO, but not balanced. It does vibrate, but it is a much lower frequency vibration which will almost put you to sleep. Definitely my favorite highway bike for long trips. And it gets considerably better mileage than the Vulcan at an indicated 80 mph. The Goldwing (1200/four) gets 35 mpg no matter how you ride it.

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post #9 of 20 (permalink) Old 02-08-2012, 08:32 PM
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just a random thought. lol I have a 1998 Chevy Camaro Z-28. 6 speed manual tranny. 86 mph is 1,900 rpms in 6th gear. lol

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post #10 of 20 (permalink) Old 02-09-2012, 08:01 AM
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Quote:
Originally Posted by eriedoc514 View Post
bear,

That is what my vulcan cranks out at 60-65 mph. Also have an old 82 Maxim that pulls about 6k at 60 mph, and it will do that all day long. These bikes are designed to run at higher rpms, very different from cars. now when you start to pull 5500 rpms at 70-75 mph, now we are talkin!!!

Kevin
I got an 82 Maxim 400 back when it was two years old. I remember noticing the speed matching the rpm like that. I also remember the vibrations at 55 or above would make my legs numb before too long. I guess that's the difference between parallel twin and V twin engines?

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