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Old 09-05-2011, 01:11 AM   #31
rickyeby
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i ride a ninja 250 on the freeway doing 75-80 once every week. One way its 95miles. The engine is doing 9000rpm at that speed. I do this only if traffic is low. if i am in traffic i go slower so i have reserve power( the little 250 is almost topped out at 80mph and acceleration is sluggish after that). I just got a vfr750 to take over the commute.

My friend rides a '82 cb450sc nighthawk and that bike has enough power to do the commute at 80mph. he has dropped the bike at slow speed to stand still a few times and had to change nothing. i would recommend one of those older mid displacement universal japanese bikes for your first bike. any post 1980 japanese bike engines have no problem doing consistent high revs. or you can get a nighthawk 750 which has the shaft drive and hydraulic valve lifters for low maintenance.

It also depends on how tall you are. if you are really tall u might want to get a klr650, or f650gs or similiar. I am 6ft and 185# and 90 miles is about the limit i can do in a strecth in the ninja 250. But on the vfr i can go much longer. i do not no that limit yet.

as you have a long daily commute your fit on the bike will be important so you wont be totally tired by the time you get to work.
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Old 09-07-2011, 03:57 AM   #32
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My 1100XX would be at a bit over 4k. But I wouldn't recommend that bike to anyone starting out. And modern engines don't really have a problem "working hard".

Last edited by seruzawa : 09-07-2011 at 06:11 AM.
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Old 09-07-2011, 12:30 PM   #33
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I commute 45 miles each way in heavy traffic on an EX250 all the time. My average speed is 80mph most of the time. No problems at all. The bike is quite capable of this.
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Old 09-07-2011, 02:05 PM   #34
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The bike is quite capable of this.
But for how long ??

There is little question that running an engine at those speeds is hard on it.

For every mile traveled, that engine makes about 3X the revolutions that mine does. And the higher it rev's, the more strain there is.

I've heard of several riders who have beat their 250s into the ground around 25K miles.
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Old 09-07-2011, 02:27 PM   #35
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Mine has over 20,000 miles on it and still going strong. My friend has well over 60,000 miles on his and he weighs about 260lbs. If someones EX doesnt last past 25,000 miles I wouldnt blame the bike. The bike redlines after 14,000 RPM and cruising the highway isnt a strain on it.
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Old 09-07-2011, 02:32 PM   #36
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That's a lot. Considering SK's commute, that's more than enough to do a full work year of commutes (assuming he works every single weekday and never gets holidays). Also, the wee Ninjas... they trade hands often. I rode my EX250 for a single season (used it for freeway commuting) before I sold it for what I bought it. I don't remember how many miles were on it when I got it, but I think I was about the third or fourth owner. He could spend a year on it and then move up when comfortable to something else.

Like the saying goes, "It's the first bike, not the last one."
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Old 09-07-2011, 03:23 PM   #37
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But for how long ??

There is little question that running an engine at those speeds is hard on it.

For every mile traveled, that engine makes about 3X the revolutions that mine does. And the higher it rev's, the more strain there is.

I've heard of several riders who have beat their 250s into the ground around 25K miles.
It likes it, thinks you're just playin' with it around 12k.
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Old 09-08-2011, 07:27 AM   #38
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For every mile traveled, that engine makes about 3X the revolutions that mine does. And the higher it rev's, the more strain there is.
I know that seems right instinctively, but I'm not sure it is actually true. It may depend on how you define "strain," or at a minimum what kind of engine you're talking about.

Take your modern, highly oversquare 600 cc supersport engine, ferinstance. I'll bet that engine has less "strain" at 10k rpm than it does at 5k.

That would not be true for a long-stroke, pushrod engine like most cruisers have.
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Old 09-08-2011, 08:20 AM   #39
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I'll bet that engine has less "strain" at 10k rpm than it does at 5k.
What kind of warped logic leads you to that conclusion ??

The main point wasn't about the strain, necessarily, but the potential wear of the engine "traveling" 3 times as far to cover the same distance on the road.

As a general rule, a high rev'ing engine has a shorter life span than one that is geared higher and runs more slowly. Exceptions no doubt apply on both sides.
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Old 09-08-2011, 10:11 AM   #40
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What kind of warped logic leads you to that conclusion ??

The main point wasn't about the strain, necessarily, but the potential wear of the engine "traveling" 3 times as far to cover the same distance on the road.

As a general rule, a high rev'ing engine has a shorter life span than one that is geared higher and runs more slowly. Exceptions no doubt apply on both sides.
Because the engine is probably "lugging" at 5k, whereas it is near the torque-peak at 10k.

You of all people should know that lugging any engine (aside from possibly a tractor) is bad for it, especially something with tiny, long valvestems, and thin, hollow camshafts (delicate rods, short, slipper-style pistons with high, narrow rings, etc......)
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