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Post by bwader on Jul 4, 2013 11:22:02 GMT -5
I'm just curious and wanted to see what speeds people shift their bikes to.
1st, 2nd , 3rd, 4th, 5th...maybe 6th...
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Post by scootnwinn on Jul 4, 2013 11:25:58 GMT -5
Mine shifts like this 1st to 2nd around 15-20 2nd to 3rd about 35 3rd to 4th somewhere around 50, 55 if I'm pulling a hill into the wind
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Post by domindart on Jul 4, 2013 12:57:02 GMT -5
scootin', how do you shift your scooter, is there a clutch on the left hand lever like a motorcycle or is it by foot or what? curious, I am!  |
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Post by scootnwinn on Jul 4, 2013 13:12:50 GMT -5
There is a clutch on the left, you rotate that same handle to shift. Brake is on the floor board on the right like it should be
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Post by prodigit on Jul 4, 2013 14:47:56 GMT -5
It all depends on how it is geared, and how fast you want to accelerate.
You can't base it on MPH, you have to base it on RPM.
If you want to accelerate fast, you can accelerate in the torque band. Most motorcycles have their torque band below 5k RPM, as they are tuned to have low end torque, rather than high end torque like the 50cc's or like kawasaki Ninja's (that increase in torque the higher the RPM goes).
If you want to accelerate easy, most of the time, revving to 2,5k RPM and then shifting is recommended. The needle should fall down to 2k RPM after a shift from 2,5k RPM.
On most bikes it would be
1st to 2nd gear ~10MPH
2nd to 3rd gear ~20MPH
3rd to 4th gear ~30MPH
4th to 5th gear ~40MPH
5th gear all the way to the tops of the revs (if it's 2k RPM @ 40MPH, at 5k RPM It'll do ~100MPH, and should be anywhere between a 500 and a 750cc).
A 150cc is usually geared differently.
In final gear it usually does 70MPH @~7k RPM tops, which means it's final gear kicks in @20mph.
Either a 4 speed, or very short geared bike.
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Post by scootnwinn on Jul 4, 2013 14:50:39 GMT -5
Have you ever looked at torque and horsepower curves for motorcycles digit? Also your rpm and speed are directly related.
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Post by domindart on Jul 4, 2013 14:59:04 GMT -5
There is a clutch on the left, you rotate that same handle to shift. Brake is on the floor board on the right like it should be So you pull in the clutch lever and rotate your wrist to shift, right? |
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Post by scootnwinn on Jul 4, 2013 15:29:02 GMT -5
Exactly dom
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Post by prodigit on Jul 5, 2013 3:48:34 GMT -5
Have you ever looked at torque and horsepower curves for motorcycles digit? Yes? On the same bike they are,but they are different from bike to bike. |
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Post by scootnwinn on Jul 5, 2013 9:41:00 GMT -5
You should look again most torque curves are pretty flat and most bikes develop torque all the way to the redline. It's the HP that rises and drops
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Post by bwader on Jul 6, 2013 12:44:26 GMT -5
seems like there should be a 6th gear if you have to shift into 5th at 40+mph
I drive 40-45 in my car for best constant speed mileage and I wish it had a 5th gear.
4 speed auto Nissan sentra
I heard many bigger bikes have a 6th gear but sure would be nice on a 250 cruiser.
That's where that sprocket change comes in
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Post by prodigit on Jul 6, 2013 16:23:02 GMT -5
Most bikes have 5 gears tops.
Only unusually large bikes have 6 gears, or they have 5 gears and a reverse (also called 6 gears).
It's the only reason I like bikes with a chain, because a sprocket change is so easy to do on them.
Also the bad about cars, is that there is no easy solution for them, to up the gearing.
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Post by larry001964 on Jul 6, 2013 18:41:14 GMT -5
If your bike has a clutch then one I think should know how to shift it without using the clutch....
Had a clutch cable break coming home from work once.. You can shift them without the clutch and without grinding the gears, but it does take practice to do it smoothly...
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Post by bwader on Jul 6, 2013 23:23:47 GMT -5
If your bike has a clutch then one I think should know how to shift it without using the clutch.... Had a clutch cable break coming home from work once.. You can shift them without the clutch and without grinding the gears, but it does take practice to do it smoothly... Interesting....... I thought you would have to just be stuck in that gear until you pulled the cable somehow |
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Post by larry001964 on Jul 6, 2013 23:31:35 GMT -5
If your bike has a clutch then one I think should know how to shift it without using the clutch.... Had a clutch cable break coming home from work once.. You can shift them without the clutch and without grinding the gears, but it does take practice to do it smoothly... Interesting....... I thought you would have to just be stuck in that gear until you pulled the cable somehow Many think that but you can do it without the clutch, speed up to where you would normally shift, put a little pressure on the shifter in the direction of your next gear, then slowly let off the rpms with the throttle, if done correctly it will drop right in for you. You can up or down shift as needed only down shifting you have to raise your rpms with pressure in the direction of your next lower gear when you hit the correct rpms for the lower gear, again it will drop right in.. Truckers have been doing this for many many years... stopping it i used the emergency shut off, and getting started again I put it in first gear hit the electric starter while giving little push to get going again... Can be done ;D I should add this is very very dangerous as you must perfectly gauge and predict your surrounding traffics actions, and you must adjust your speed to compassionate for timing of other traffic and traffic lights and turns.. There's no room for an error of any kind, from you or anybody else.. I was running my emergency flashers on and it was late at night with very very light traffic.. Plus somebody was watching over me... |
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