What is your top speed in 1st gear? - Honda RC51 Forum : RC51 Motorcycle Forums
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post #1 of 16 (permalink) Old 05-03-2017, 12:14 AM Thread Starter
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What is your top speed in 1st gear?

I feel my 03 has lost some of its high RPM power. There are no other signs of functional or performance issues. What is your highest speed in first gear and what gearing are you running?

16/40 (stock) 60mph in first
I feel it use to be higher...
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post #2 of 16 (permalink) Old 05-03-2017, 12:26 AM
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Given that the rear wheel is mechanically coupled to the engine, it's not possible for your top speed in first to change without a cause of slip in the system (clutch)


Your hard rev limiter won't change, and clutch slip rarely shows up in first gear, so I'd suggest you're likely making this up
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post #3 of 16 (permalink) Old 05-03-2017, 12:35 AM Thread Starter
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Oh I completely admit my perception could be off and everything is fine. That's why I am sourcing normal/average numbers from other RC owners.
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post #4 of 16 (permalink) Old 05-03-2017, 12:40 AM
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have a peak at this site. it's very useful for questions like yours

Gearing Commander: Motorcycle Speed, RPM, Chain & Sprockets Calculator
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post #5 of 16 (permalink) Old 05-03-2017, 12:58 AM Thread Starter
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Very cool website. thank you!

If my actual speed is 12% less than what it should be given the tire size and gearing is that considered normal?
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post #6 of 16 (permalink) Old 05-03-2017, 05:09 AM
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Garage
does the model take into account transmission loss? It should....

Old enough to know better, young enough not to care.
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post #7 of 16 (permalink) Old 05-03-2017, 08:20 AM
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Originally Posted by Dutchy View Post
does the model take into account transmission loss? It should....
If by "the model" you're referring to the Gearing Commander website Wibbly posted, the answer is the same as Wibbly posted above: That site doesn't consider horsepower, torque, wind drag, rider weight, engine mods, engine problems, etc etc ... it simply says that mechanically speaking at redline in X gear your unmodified bike with factory sized tires will be going X mph. It does not consider whether or not your bike can actually achieve redline in any of your bike's gears.

Example: The site states that my ZX14R will do something like 194 mph in 6th gear at redline, but most riders can't get the bike to redline in 6th gear, again due to wind drag, rider weight, etc, so actual top speed is usually around 185 to 190.
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post #8 of 16 (permalink) Old 05-03-2017, 09:43 AM
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Does anyone know there is an RC51 specific gearing calculator on the ROGUE site that has been there for 17 years

http://www.rc51.org/host/rc51gear.xls
DannyBoy and Duckhunter like this.
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post #9 of 16 (permalink) Old 05-03-2017, 09:51 AM
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does the model take into account transmission loss? It should....
there is no slip in a transmission, you don't lose speed through it, only torque, and we aren't discussing that.
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post #10 of 16 (permalink) Old 05-03-2017, 09:52 AM
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Originally Posted by Ilostmywatch View Post
Very cool website. thank you!

If my actual speed is 12% less than what it should be given the tire size and gearing is that considered normal?


have you actually checked to know exactly what is on your bike?
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