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Old 07-30-2019, 10:56 AM
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You may not realize it yet, but what we do here is crowd source harley motorcycle questions. The "wisdom of the crowd" is better than the wisdom of a few. (You can qoute me on that!).

Anyway, I have a question....

Pretend you have a 1964 Duo Glide Solo motorcycle ( Here is a good description of that motorcycle https://www.rideapart.com/articles/2...intage-review/ )

Pretend you are in fourth gear at 3000 rpm. Your speed is 65 mph.

Is it possible to go from 3000 RPM to 1000 RPM in 3.5 seconds without crashing the motorcycle?

Basically I am asking if a bike in that scenario (3000 rpm 65 mph) could stop in 3.5 seconds without crashing?

Anway, I am interested in what you guys think...

Thanks in advance.
 

Last edited by BobRR; 07-30-2019 at 11:08 AM.
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Old 07-30-2019, 11:00 AM
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Why the brake? Just the first two (clutch, throttle) will get you to 1000 rpm in 3.5 seconds.
 
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Old 07-30-2019, 11:01 AM
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Originally Posted by RHPAW
Why the brake? Just the first two (clutch, throttle) will get you to 1000 rpm in 3.5 seconds.
The brake is important because I am also assuming the bike comes to a near stop. (I forgot to put that in my original post, but I have gone back and edited it)
 

Last edited by BobRR; 07-30-2019 at 11:05 AM.
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Old 07-30-2019, 11:03 AM
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Originally Posted by RHPAW
Why the brake? Just the first two (clutch, throttle) will get you to 1000 rpm in 3.5 seconds.
This. You said nothing about changing road speed, only engine speed.

Heck, roll off throttle and pull in clutch, hit kill switch. 3000 RPM to zero RPM in 3 seconds or less.
 
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Old 07-30-2019, 11:04 AM
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I agree with RHPAW; your initial question didn't reference speed, only RPM.
 
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Old 07-30-2019, 11:06 AM
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Originally Posted by Uncle G.
This. You said nothing about changing road speed, only engine speed.

Heck, roll off throttle and pull in clutch, hit kill switch. 3000 RPM to zero RPM in 3 seconds or less.
Yes, I know. I changed my question after he responded.
 
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Old 07-30-2019, 11:30 AM
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Originally Posted by BobRR
Basically I am asking if a bike in that scenario (3000 rpm 65 mph) could stop in 3.5 seconds without crashing?
.
does that begin AFTER the rider decides to stop?
Or does that include reaction time?
https://begin-motorcycling.co.uk/the...bt/element-c/b

another view is
https://nacto.org/docs/usdg/vehicle_...time_upenn.pdf

either way.... given the Duo-glide has drum brakes.... no....
3k,or6.5k one's engine speed shouldn't matter....

 
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Old 07-30-2019, 11:32 AM
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Basically I am asking if a bike in that scenario (3000 rpm 65 mph) could stop in 3.5 seconds without crashing?

Why do you want to know and what are you planning to do?
 
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Old 07-30-2019, 11:44 AM
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Nitpicking here. but 65 mph in fourth gear on a Panhead is probably more like 3500 rpm.
...and even with a good drum brake, it will probably skid, but you still don't have to crash it.
 
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Old 07-30-2019, 12:04 PM
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Originally Posted by BobRR
You may not realize it yet, but what we do here is crowd source harley motorcycle questions. The "wisdom of the crowd" is better than the wisdom of a few. (You can qoute me on that!).

Anyway, I have a question....
Are you kidding? The more people you put in a crowd the dumber they get.

Anyway, the answer to your confusing question is: Yes?
 
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