Should I feel guilty above 4K rpm? - Kawasaki KLR 650 Forum
1987 to 2007 Wrenching & Mods For maintaining, repair or modifications of Generation 1 KLR's. 2007 and earlier.

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post #1 of 32 Old 07-02-2014, 05:17 PM Thread Starter
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Should I feel guilty above 4K rpm?

made a quick run home today,about 100 miles mostly above 4-4500 rpm on the highway.
Is that too much for that far?
I felt a little bad...
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post #2 of 32 Old 07-02-2014, 05:38 PM
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post #3 of 32 Old 07-02-2014, 07:03 PM
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Quote:
Originally Posted by Jeepflambe View Post
made a quick run home today,about 100 miles mostly above 4-4500 rpm on the highway.
Is that too much for that far?
I felt a little bad...
"Felt bad," WHY?

You''re WAY under redline rpm, and you're riding a 4-valves-per-cylinder engine with a low-mass shim-and-bucket valvetrain . . . your engine LIKES high-rpm operation!

You're not about to hurt anything at higher rpm; AFAIK, the KLR650 engine has no rpm limiter, as do some more highly-stressed engines. To me, this absence of any rpm limiter means the KLR engineers realized, the intake/exhaust system of the KLR650 will not permit damaging high-rpm excursions; thus, no electric rpm limiter is needed.

Keep 'er below redline, and . . . "Don't worry, be happy!"
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post #4 of 32 Old 07-02-2014, 07:33 PM
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Heck, I'm usually cruising at 4500 or close to 5000 commuting
I keeps an eagle eye on the oil though, I'm on an 08

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post #5 of 32 Old 07-02-2014, 08:39 PM
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that is the perfect rpm range for mine. She still has a lot of get up and go left (for a KLR that is) and it can run all day. I have done it (10 hours in the saddle at 4500 rpm) and no oil burning.
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post #6 of 32 Old 07-02-2014, 11:16 PM
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I think that PDwestman identified the KLR valve train as being much the same as a KZ1000.
Those were good for 10,000 RPM stock so unlikely a problem. FWIW, my slightly modified KLR will spin up over 9,000 RPM in 3rd and 4th gear.

I've done it several times merging onto the freeway and it's still pulling. The tach checks out with two of my test tachs & the RPM matches road speed in gears. Compare the KLR's RPM range with a small block Chevy such as 327 or 350, which have a similar bore/stroke and consider low RPM. It will be seen, I suggest, that the KLR engine isn't the low RPM thumper which people claim. It actually doesn't pull worth spit in the low RPM range useful in automotive V8's of similar bore/stroke. It will hardly run at 500 RPM and isn't useful below 1,000 RPM where a V8 will putter along.

Keep good oil in it (enough good oil) and ride it the way you need to to get the job done. It will likely handle it without affecting the engine life at all.
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post #7 of 32 Old 07-03-2014, 10:49 AM Thread Starter
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Wow
I was told that a thumper could only rev up to 4-5 gs tops.
Im glad I know this now.I like being rev happy!!!
Thanks
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post #8 of 32 Old 07-03-2014, 01:14 PM
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Quote:
Originally Posted by Jeepflambe View Post
Wow
I was told that a thumper could only rev up to 4-5 gs tops.
Im glad I know this now.I like being rev happy!!!
Thanks
They'll rev way higher than that no problems .
Though if you are running it in the 5000 and up range I would keep an eye on your oil level, that seems to be the rpm that some bikes drink oil at. My 08 doesn't touch oil at 4500 rpm but when I get on a long trip at 5000+ it will go down a bit.

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post #9 of 32 Old 07-03-2014, 03:40 PM
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Definitely more fun at higher rpm's especially if paved.
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post #10 of 32 Old 07-03-2014, 05:59 PM
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4K seems to be where my bike is happiest. But I'll do 5K for hours on the slab. As mentioned, check the oil if it's a Gen2. Other than that, have fun.




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