reduce RPM at higher speeds - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 19 (permalink) Old 08-13-2008, 10:47 AM Thread Starter
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Smile reduce RPM at higher speeds

750 runs like a dream and especially at 60 to 64 mph. Trying to see how I can best reduce RPM at higher speeds ie. 70 to 78 but allowing the engine not to work so hard 5000 to 5500 rpm.

Alternatives: don't drive so fast, add 6th gear, change gear ration for the 5th gear, get a 1500... Any good ideas would be appreciated.
dixon
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post #2 of 19 (permalink) Old 08-13-2008, 11:15 AM
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5200 rpm is about 80 mph on my bike. Puts it right near the top of the powerband. Personally that's where I want it to be at that speed. If I need the extra boost, it's there.
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post #3 of 19 (permalink) Old 08-13-2008, 03:58 PM
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750 runs like a dream and especially at 60 to 64 mph. Trying to see how I can best reduce RPM at higher speeds ie. 70 to 78 but allowing the engine not to work so hard 5000 to 5500 rpm.

Alternatives: don't drive so fast, add 6th gear, change gear ration for the 5th gear, get a 1500... Any good ideas would be appreciated.
dixon
Learn to live with it. Because of the shaft drive it cost alot of $$$ to change the gearing..internaly too...
The bike is built to run at the speeds it does and it works pretty damn well in my book. It ain't a Harley. If you don't like the engine turning so fast at higher speeds, get a diffrent bike.

KM

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post #4 of 19 (permalink) Old 08-13-2008, 04:34 PM
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This is a common complaint and a 6th gear is on everyone's wish list. Unfortunately, no reasonable solution exists. IMO, the bottom line is that the VN750 is not a great highway bike - but it does the job and it's great around town.
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post #5 of 19 (permalink) Old 08-13-2008, 04:56 PM
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I ride my bike everyday. And everyday I habitually kick up one more time looking for sixth. I think the only topic with more threads is the oil issue....
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post #6 of 19 (permalink) Old 08-13-2008, 05:14 PM
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This is a common complaint and a 6th gear is on everyone's wish list. Unfortunately, no reasonable solution exists. IMO, the bottom line is that the VN750 is not a great highway bike - but it does the job and it's great around town.
That is a rather blanket and silly statement...The Vulcan runs great on the highway..it is just folks that can not get used to the bike running at over 4000 rpms have the problem..it ain't the bike. Ride a Harley at 75 mph over a few hundred miles and you will want your Vulcan back........

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post #7 of 19 (permalink) Old 08-13-2008, 05:28 PM
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FWIW, in the newest motorcycle mag I just read, some new bike, '08 or '09, I can't remember which, but I'll find out and post it; anyway, this new bike only has 5 speeds too, and the bikes coming out now are ride long way bikes, (more or less), so like KM is saying, there is no problem, not with the bike....
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post #8 of 19 (permalink) Old 08-13-2008, 07:25 PM
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Having a wider rear tire seems to reduce your rpm's. I have the Pirelli (spelled wrong I think) tires. The company states to run the rear at something like 42psi. One day while riding in the rain I lowered my psi to 38 to get more grip on the road and was very surprised to see my rpm's running lower for the same speed. I know others (Dianna) stated that having a 170 on the rear dropped the rpm's by 500. My next rear tire will be a 170 for sure!

Mike B.
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post #9 of 19 (permalink) Old 08-13-2008, 08:05 PM
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I have from time to time caught myself running in 4th gear and no realizing that I am in that low a gear. Am I the only one that has done that silly thing??

02 honda sabre 1100
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post #10 of 19 (permalink) Old 08-13-2008, 08:10 PM
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Wing riders who pull trailers will switch rear ends with older models (like 1200's will use a 1000 to get better gearing). Wonder if other differentials will work on our vn's? I have a 750 Spectre in parts, if I get some free time, I might give it a try and post results.

DT

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