Author Topic: Tachometer Range  (Read 1632 times)

Oldie

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Tachometer Range
« on: April 24, 2012, 08:56:03 PM »
I am used to a tach on a motorcycle where you shift through the gears of the transmission and the relative RPMs of
each gear.  This is the first scooter that I've owned with a tach and don't quite know or understand with the CVT's
what is a preferred or acceptable RPM range for a given speed on say a level roadway!

I hope this isn't too confusing a question and maybe there's no easy answer to it.  Thanks for any guidance or help
in sheding any light on the subject.

Thanks,  ED
Silver Bullet- 2011 Downtown 300i

MaryK

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Re: Tachometer Range
« Reply #1 on: April 25, 2012, 12:07:01 AM »
I don't know of any way to affect the RPMs at any certain MPH, so I ignore this feature and focus on the road.
Perhaps it can be used as a diagnostic, but my scooter hasn't had a problem yet.

Scoot safely
New Rider in 2010

2009 GrandVista 250

Vivo

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Re: Tachometer Range
« Reply #2 on: April 25, 2012, 03:52:24 AM »
So you'll know the rpm of your engine. Maybe that's all it is to it.

Cortez

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Re: Tachometer Range
« Reply #3 on: April 25, 2012, 05:40:18 PM »
I wouldn't but a scooter or a motorcycle without one.

Knowing where the maximum torque (6500) and power (8000) are, it allows you to know if and how
well the scooter will accelerate when you're at a certain (higher) speed. As any DT300 owner will
notice, at around 55-60mph, the CVT "shifts" to the last position (gear) available, and wide open
throttle there will sometimes result in the bike accelerating rather slowly maintaining just 5500rpms.

That same tachometer allowed me to know what Dr Pulley sliders to get (with a lot of help from TANWare)
to be able to put the "needle" where I want it at full throttle, and that's anywhere over 6500. 14gr sliders
did exactly that.

Also, having the rpm readout makes me ride slower at higher speeds since I'm aware of how fast the
engine is turning (and how close to it's maximum it is). I don't like to ride at over 6500 on my DT for
long periods of time. That was at 68mph before the Pulley upgrade, it's now at 75mph at those revs.
'08 FZ6n S2 ABS

SOLD: 2003 Peugeot Speedfight2 LC, 2007 Kawasaki ER-6F ABS, 2006 Kymco Agility 125, '12 Kymco Downtown 300i ABS,

Oldie

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Re: Tachometer Range
« Reply #4 on: April 26, 2012, 07:24:21 PM »
Thanks for everyone's responses.  Cortez, are you saying 6500 RPM's is about max for a constant speed on a stock
"Downtown"?
Thanks all.
Thanks,  ED
Silver Bullet- 2011 Downtown 300i

Cortez

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Re: Tachometer Range
« Reply #5 on: April 26, 2012, 07:35:39 PM »
Thanks for everyone's responses.  Cortez, are you saying 6500 RPM's is about max for a constant speed on a stock
"Downtown"?
Thanks all.

I was talking about my subjective preference.
I have no doubt that it will do 20.000 miles at 8000 rpm, but I'd rather if it did 40.000 miles at 6500.
'08 FZ6n S2 ABS

SOLD: 2003 Peugeot Speedfight2 LC, 2007 Kawasaki ER-6F ABS, 2006 Kymco Agility 125, '12 Kymco Downtown 300i ABS,

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