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High gearing seizes engine/gearing for speed. (Read 414 times)
Oldfeller--FSO
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Re: Top speed and gearing...
Reply #15 - 04/03/16 at 15:32:37
 

5th gear is useless for top speed or power, it is actually slower than 4th gear.

It is good for loafing along though .....
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Re: Top speed and gearing...
Reply #16 - 04/03/16 at 15:40:27
 
How is that?!?!

Or why?

Maybe rider weight plays into this? Maybe they geared the Savage best for 2-up riding? Isn't that a little unreasonable?

I doubt people are fond of running their Royal Enfields in 4th gear at 85 mph given their power curve. Using 5th gear at this speed seems very fitting, and if that little 500 can do it, surely our big 650 can do it.

Wait a minute, Oldfeller!

Your bike is well modded. You've got plenty of power. Do you have the 17/43 chain conversion or something? Something is not adding up.

I'd say fifth gear is far from useless once you get up to 60 mph.
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OK.... so what's the
speed of dark?

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Re: Top speed and gearing...
Reply #17 - 04/03/16 at 16:59:12
 
Any top gear that runs the bike out of horsepower can be considered an overdrive.
A taller top gear could give a lower rpm cruise speed at say 70mph, but our bike isn't designed as a highway cruiser...

...and if a stock RE gets a higher top speed than a Savage,.. it's falling off a cliff....  Grin
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Re: Top speed and gearing...
Reply #18 - 04/03/16 at 17:38:29
 
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Re: Top speed and gearing...
Reply #19 - 04/03/16 at 17:41:54
 
Serowbot wrote on 04/03/16 at 16:59:12:
...and if a stock RE gets a higher top speed than a Savage,.. it's falling off a cliff....  Grin


You got that right!  Grin

Many, many machines will pull harder in the lower gear than top. It's no biggie. It is what it is.
I have a feeling that even if you got the cabbage to pull top whack in top gear, once you sat a 200lb carcass on it with it's knees in the breeze, any relationship the dyno figures have with the real world would sail out the window.
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Re: Top speed and gearing...
Reply #20 - 04/03/16 at 17:47:53
 
cheapnewb24 wrote on 04/03/16 at 17:38:29:
Oh yeah?!

Watch this! Cheesy


Sadly, that doesn't prove anything. RE speedos are famously optimistic so I'd call that 140 reading 130 real world KPH so that's 80mph and is a much more likely figure. My Continental GT with modified inlet, exhaust and Power Commander is still only good for 90mph and that's with a 130lb rider tucked away out of the wind.
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Re: Top speed and gearing...
Reply #21 - 04/03/16 at 17:50:11
 
But... But... Undecided Undecided Undecided

How are you supposed to go faster in the dead part of the power curve (approaching redline) than in the sweet spot? Weight and wind resistance only matters if it causes the engine to bog down to it's sweet spot. Doesn't the Savage easily pull 80 in top gear up Mount Everest, plowing the ground with a 200 lb anchor?  Grin
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Re: Top speed and gearing...
Reply #22 - 04/03/16 at 17:54:21
 
gizzo wrote on 04/03/16 at 17:47:53:
cheapnewb24 wrote on 04/03/16 at 17:38:29:
Oh yeah?!

Watch this! Cheesy


Sadly, that doesn't prove anything. RE speedos are famously optimistic so I'd call that 140 reading 130 real world KPH so that's 80mph and is a much more likely figure. My Continental GT with modified inlet, exhaust and Power Commander is still only good for 90mph and that's with a 130lb rider tucked away out of the wind.


Okay, it wasn't really supposed to mean it beat the Savage anyway. Point is, it's a smaller motor  pulling a taller gear. But... if it can only do 80, it makes me wonder. Undecided
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Re: Top speed and gearing...
Reply #23 - 04/03/16 at 17:58:17
 
I'm tempted to pull together some used chains and sprockets to give this whole tall gearing thing a try-- at least as an experiment. I've got twisties and steep backroads.
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Re: Top speed and gearing...
Reply #24 - 04/03/16 at 18:05:37
 
cheapnewb24 wrote on 04/03/16 at 17:54:21:
Okay, it wasn't really supposed to mean it beat the Savage anyway. Point is, it's a smaller motor  pulling a taller gear. But... if it can only do 80, it makes me wonder. Undecided


Wonder what? It's an old fashioned 2 valve engine that makes around 18 rear wheel horsepower with sit up and beg styling... Whaddaya expect from it? Good luck with the chain and sprocket tests. Should be fun.
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Re: Top speed and gearing...
Reply #25 - 04/03/16 at 18:10:36
 
The new 500 RE's are rated over 25 hp. The chart shows over 27. It looks like torque is close to 30. This is comparable with what some Savages can do.
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Re: Top speed and gearing...
Reply #26 - 04/03/16 at 18:23:24
 
They rate it at the crankshaft, not the rear wheel. Some hefty driveline losses there and proven with dyno sessions by REal owners, not interwebs browsers. But that's neither here nor there, we are comparing cabbages and lemons.
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Re: Top speed and gearing...
Reply #27 - 04/03/16 at 18:44:50
 
They still have a taller gear than we do!  Grin
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OK.... so what's the
speed of dark?

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Re: Top speed and gearing...
Reply #28 - 04/03/16 at 23:06:50
 
If I put on a size 14 shoe,... will I run faster?...

Hmmmmm?..... Undecided
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Re: Top speed and gearing...
Reply #29 - 04/03/16 at 23:09:59
 
Serowbot wrote on 04/03/16 at 23:06:50:
If I put on a size 14 shoe,... will I run faster?...

Hmmmmm?..... Undecided

no but you'll ski faster   Cool
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