They will do 55 all day long, no prob.
What might it be, with factory sprockets?
Sure, it'll do 55-60. Will it HOLD that speed?
It makes a difference. I live in a small city in the Rockies...there are two kinds of roads going out of town. Highways, with 75-mph speed limits; and fire trails.
There are plenty of worthwhile trails about - but they often take 30 or more miles of highway to get to them. Trailering this ride isn't an option right now.
So...would I hurt it running it at 55 or so for sustained periods? Can I over-rev the thing (a 2014) or is there a rev limiter?
They will do 55 all day long, no prob.
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I've run 60-65 for a few hours on a trip to Letchworth. 70-75 once or twice with a good wind at my back.
I have a 55 tooth rear sprocket and will do 60 mph endlessly. Just make sure the oil is full and chain well lubed. Get a small, cheap tachometer. Redline is 9,500 rpm.
Long live the internal combustion engine!
Now that mine has 1000+ miles and after Moab is "broken in", I find 55-60 pretty comfortable on state highways....the first 500 miles or so, not so much....
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March 2015 Moab: With 30 TW Forum Friends..
Summer 2015 Great Lakes, Wisconsin, UP of Michigan, With Borneo and Montezuma
November 2015: SE Ohio/West Virginia w/ Borneo and Montezuma
March 2016: Big Bend NP in South Texas w/ Montezuma, Borneo, Ebbanflood and FW Gary
August 2016: Montezuma and Hoot's Covered Bridge Ride in Southern Indiana
There is no way I would try to mix it up with 75 mph traffic on a busy Interstate.
Hurting the engine is not the problem, hurting yourself because you can't get out of the way is. At the higher altitudes of Colorado, fire trails and back roads are the only thing I would tackle. I lived there for 20 years in C. Springs and Aspen, and I would want a MINIMUM of a 250cc bike if I still lived there and COULD NOT trailer the bike. You have already lost a third of your power by 8,000 feet.
Sorry to rain on your parade....given your needs, it is not the right bike for you.
2014 BMW R1200GS LC
What about issues about the chain sprockets not being directly in line? Sure, it works on a bicycle. Power and speed are a little lower.
Should the highway sprocket be directly in line and the off-road sprocket be offset? How's a quick way to change, without loosening the axle and re-tensioning the chain?
The other, is a quick hop-on-and-go gofer ride in town. Something not so pretty, so that when (not if) it gets knocked over the damages aren't so high. A few years back in another town I had a TU250 for the same purpose - get on and go to go check the mail or get to work a mile away; without all the muscle strain and warmup issues of getting my big BMW out.
Appreciate the honesty; but so far it's worked...okay. Had to move a pickup truck to Helena, about 150 miles away...rather than the hassle of recruiting someone to drive it or my other vehicle, I opted to throw the TW in the back and ride home. Traffic (over a fer-chrissake MOUNTAIN PASS!) was impatient (I was doing about 40 in 4th gear) but by watching it and kissing the white line I was able to stay out of harm's way.
That was really the reason for my concern on this...that trip took me three hours; when I could I was on frontage roads or side roads, but it involved 20 miles on Interstates (not a good idea) and forty more climbing a mountain pass on a busy state highway. My wrench at the Yamaha dealership warned me that the engine might not be up to sustained high speed/RPMs and that's part of why I'm asking.