Use CVT transmission (from minibike) for electric bicycles, scooters?

Just saw a 49cc mini motorcycle with a Constant Velocity Transmission.
It was a Chinese motorbike with "CVT" stamped on the chain cover.
Price was only $250 for the whole motorbike.

Anybody with a report on how reliable, long term use, this CVT is? Are
they sold as "parts" and be used for full-size 750-watt electric bikes
or 1500-watt electric scooters?

On 26 Sep 2004 21:44:06 -0700, (fancy
nospam tunes) wrote:

Just saw a 49cc mini motorcycle with a Constant Velocity Transmission.
It was a Chinese motorbike with "CVT" stamped on the chain cover.
Price was only $250 for the whole motorbike.

Anybody with a report on how reliable, long term use, this CVT is? Are
they sold as "parts" and be used for full-size 750-watt electric bikes
or 1500-watt electric scooters?

In Taiwan all of the scooters are CVT. I personally own and ride a
Kymco 125cc scooter with a CVT. Its damn good and the build quality
is excellent. I cannot speak for China built bikes though.


Michael J. Klein
Dasi Jen, Taoyuan Hsien, Taiwan, ROC
Please replace mousepotato with asiancastings
---------------------------------------------

On Sat, 02 Oct 2004 22:49:16 +0800, Michael J. Klein
wrote:

On 26 Sep 2004 21:44:06 -0700, (fancy
nospam tunes) wrote:

Just saw a 49cc mini motorcycle with a Constant Velocity Transmission.
It was a Chinese motorbike with "CVT" stamped on the chain cover.
Price was only $250 for the whole motorbike.

Anybody with a report on how reliable, long term use, this CVT is? Are
they sold as "parts" and be used for full-size 750-watt electric bikes
or 1500-watt electric scooters?

In Taiwan all of the scooters are CVT. I personally own and ride a
Kymco 125cc scooter with a CVT. Its damn good and the build quality
is excellent. I cannot speak for China built bikes though.


Michael J. Klein
Dasi Jen, Taoyuan Hsien, Taiwan, ROC
Please replace mousepotato with asiancastings
---------------------------------------------
My only reason for jumping in here is that about 10, maybe 15 years ago
there was some investigation done on using CVTs for cars. It was
determined that they would not hold up under the abuse drivers put
them through (floor it, pull out slow) unless they were very large
and thus impracticle for a car. For a small limited power bike they
may make sense since a small bike is almost always full throttle from
a stop due to lack of power. Designing around this should be no problem.
Of course being made in China does not give me warm fuzzies either.
Now that electric is here I don't think they will ever be in cars.
Bill Baka


--
Using M2, Opera's revolutionary e-mail client: http://www.opera.com/m2/

Subject: Use CVT transmission (from minibike) for electric bicycles,
scooters?
From: Bill Baka
Date: 10/2/2004 10:55 AM US Eastern Standard Time
Message-id:

On Sat, 02 Oct 2004 22:49:16 +0800, Michael J. Klein
wrote:

On 26 Sep 2004 21:44:06 -0700, (fancy
nospam tunes) wrote:

Just saw a 49cc mini motorcycle with a Constant Velocity Transmission.
It was a Chinese motorbike with "CVT" stamped on the chain cover.
Price was only $250 for the whole motorbike.

Anybody with a report on how reliable, long term use, this CVT is? Are
they sold as "parts" and be used for full-size 750-watt electric bikes
or 1500-watt electric scooters?

In Taiwan all of the scooters are CVT. I personally own and ride a
Kymco 125cc scooter with a CVT. Its damn good and the build quality
is excellent. I cannot speak for China built bikes though.


Michael J. Klein
Dasi Jen, Taoyuan Hsien, Taiwan, ROC
Please replace mousepotato with asiancastings
---------------------------------------------
My only reason for jumping in here is that about 10, maybe 15 years ago
there was some investigation done on using CVTs for cars. It was
determined that they would not hold up under the abuse drivers put
them through (floor it, pull out slow) unless they were very large
and thus impracticle for a car. For a small limited power bike they
may make sense since a small bike is almost always full throttle from
a stop due to lack of power. Designing around this should be no problem.
Of course being made in China does not give me warm fuzzies either.
Now that electric is here I don't think they will ever be in cars.
Bill Baka

Think again, some new fords are using CVT's, and they were used in Subaru
Justys. I think the Prius is too, but not sure, not a huge Prius fan here.

On 02 Oct 2004 16:10:25 GMT, Fx199 wrote:

Subject: Use CVT transmission (from minibike) for electric bicycles,
scooters?
From: Bill Baka
Date: 10/2/2004 10:55 AM US Eastern Standard Time
Message-id:

On Sat, 02 Oct 2004 22:49:16 +0800, Michael J. Klein
wrote:

On 26 Sep 2004 21:44:06 -0700, (fancy
nospam tunes) wrote:

Just saw a 49cc mini motorcycle with a Constant Velocity Transmission.
It was a Chinese motorbike with "CVT" stamped on the chain cover.
Price was only $250 for the whole motorbike.

Anybody with a report on how reliable, long term use, this CVT is? Are
they sold as "parts" and be used for full-size 750-watt electric bikes
or 1500-watt electric scooters?

In Taiwan all of the scooters are CVT. I personally own and ride a
Kymco 125cc scooter with a CVT. Its damn good and the build quality
is excellent. I cannot speak for China built bikes though.


Michael J. Klein
Dasi Jen, Taoyuan Hsien, Taiwan, ROC
Please replace mousepotato with asiancastings
---------------------------------------------
My only reason for jumping in here is that about 10, maybe 15 years ago
there was some investigation done on using CVTs for cars. It was
determined that they would not hold up under the abuse drivers put
them through (floor it, pull out slow) unless they were very large
and thus impracticle for a car. For a small limited power bike they
may make sense since a small bike is almost always full throttle from
a stop due to lack of power. Designing around this should be no problem.
Of course being made in China does not give me warm fuzzies either.
Now that electric is here I don't think they will ever be in cars.
Bill Baka

Think again, some new fords are using CVT's, and they were used in Subaru
Justys. I think the Prius is too, but not sure, not a huge Prius fan
here.

I am not sure the CVT is all mechanical, it may be electrical, but I
would have to do some research to be totally sure. The problem with
CVTs was that they could not handle huge amounts of torque, which
may not be a problem with the small engines in a hybrid. The best
reason I can think of to use one is to keep the RPMs up to the
motor/generator while dumping braking energy back into the battery pack.
Again, I don't claim to be an expert since my research mode is limited
by a dial up only speed problem. Too far for DSL, and cable is too
expensive for my time online (so far, it's Comcast).
Bill Baka


--
Using M2, Opera's revolutionary e-mail client: http://www.opera.com/m2/

Bill Baka writes:

... about 10, maybe 15 years ago there was some investigation done
on using CVTs for cars. It was determined that they would not hold
up under the abuse drivers put them through (floor it, pull out
slow) unless they were very large and thus impracticle for a
car. For a small limited power bike they may make sense since a
small bike is almost always full throttle from a stop due to lack of
power. Designing around this should be no problem. Of course being
made in China does not give me warm fuzzies either. Now that
electric is here I don't think they will ever be in cars.

Various car makers are discontinuing their CVT's for durability
reasons. Some mechanisms do not scale well and this appears to be
such a beast. They served well in small engine vehicles and the DAF
car when it has a small two stroke motor but never made it to vehicles
over 100HP. In contrast, diesel engines don't scale down well,
certainly not to motorcycle dimensions, while scaling up beautifully to
cylinder bores close to one meter n diameter. If CVT's could be used for
common autos, highway trucks would be where you would see them first.

http://www.bath.ac.uk/~ccsshb/12cyl/

Jobst Brandt

From:

Various car makers are discontinuing their CVT's for durability
reasons. Some mechanisms do not scale well and this appears to be
such a beast. They served well in small engine vehicles and the DAF
car when it has a small two stroke motor but never made it to vehicles
over 100HP. In contrast, diesel engines don't scale down well,
certainly not to motorcycle dimensions, while scaling up beautifully to
cylinder bores close to one meter n diameter. If CVT's could be used for
common autos, highway trucks would be where you would see them first.

http://www.bath.ac.uk/~ccsshb/12cyl/

Jobst Brandt









I guess we know what you facts are worth:

http://info.detnews.com/autosconsume...x.cfm?id=16202

""Freestyle is powered by a 203-horsepower 3.0-liter V-6 engine and a
continuously variable transmission.""

Gee, did they discontinue it on a model that's not out yet??

--And---

http://info.detnews.com/autosconsume...x.cfm?id=14542

""While Honda offers Civic Hybrid buyers a choice of transmissions  a
five-speed manual or a continuously variable automatic transmission  Toyota is
marketing the redesigned 04 Prius only with a continuously variable unit. ""

HEY ROCKY, WATCH ME PULL MY HAED OUTTA MY ASS!!

I pointed these out in an earlier post, you're not listening sir.

In article , Bill Baka
wrote:

On 02 Oct 2004 16:10:25 GMT, Fx199 wrote:

Subject: Use CVT transmission (from minibike) for electric bicycles,
scooters?
From: Bill Baka
Date: 10/2/2004 10:55 AM US Eastern Standard Time
Message-id:

On Sat, 02 Oct 2004 22:49:16 +0800, Michael J. Klein
wrote:

On 26 Sep 2004 21:44:06 -0700, (fancy
nospam tunes) wrote:

Just saw a 49cc mini motorcycle with a Constant Velocity Transmission.
It was a Chinese motorbike with "CVT" stamped on the chain cover.
Price was only $250 for the whole motorbike.

Anybody with a report on how reliable, long term use, this CVT is? Are
they sold as "parts" and be used for full-size 750-watt electric bikes
or 1500-watt electric scooters?

My only reason for jumping in here is that about 10, maybe 15 years ago
there was some investigation done on using CVTs for cars. It was
determined that they would not hold up under the abuse drivers put
them through (floor it, pull out slow) unless they were very large
and thus impracticle for a car. For a small limited power bike they
may make sense since a small bike is almost always full throttle from
a stop due to lack of power. Designing around this should be no problem.
Of course being made in China does not give me warm fuzzies either.
Now that electric is here I don't think they will ever be in cars.
Bill Baka

Think again, some new fords are using CVT's, and they were used in Subaru
Justys. I think the Prius is too, but not sure, not a huge Prius fan
here.

I am not sure the CVT is all mechanical, it may be electrical, but I
would have to do some research to be totally sure. The problem with
CVTs was that they could not handle huge amounts of torque, which
may not be a problem with the small engines in a hybrid. The best
reason I can think of to use one is to keep the RPMs up to the
motor/generator while dumping braking energy back into the battery pack.
Again, I don't claim to be an expert since my research mode is limited
by a dial up only speed problem. Too far for DSL, and cable is too
expensive for my time online (so far, it's Comcast).
Bill Baka

The Audi CVT, optionally available in the A4, handles at least 170 hp (I
can't tell if it is available with the 220 hp 3-litre engine, or only
with the 1.8 turbo):

http://www.bullz-eye.com/carreviews/2002/audiA4.htm

The Ford 500 has 203 hp and a CVT. They say their CVT engineers can kick
GM's CVT engineers' butts.

http://www.caranddriver.com/article....rticle_id=8533

Personally, I think the future of the transmission lies with
servo-shifted auto-clutch electronic manuals, as seen in a bunch of cool
cars.

--
Ryan Cousineau, http://www.wiredcola.com
Verus de parvis; verus de magnis.

RU486 writes:

Various car makers are discontinuing their CVT's for durability
reasons. Some mechanisms do not scale well and this appears to be
such a beast. They served well in small engine vehicles and the
DAF car when it has a small two stroke motor but never made it to
vehicles over 100HP. In contrast, diesel engines don't scale down
well, certainly not to motorcycle dimensions, while scaling up
beautifully to cylinder bores close to one meter n diameter. If
CVT's could be used for common autos, highway trucks would be where
you would see them first.

http://www.bath.ac.uk/~ccsshb/12cyl/

I guess we know what you facts are worth:

http://info.detnews.com/autosconsume...x.cfm?id=16202

""Freestyle is powered by a 203-horsepower 3.0-liter V-6 engine and a
continuously variable transmission.""

Gee, did they discontinue it on a model that's not out yet??

This is one of the cars that will discontinue the unit for reliability
and acceptance problems.

http://info.detnews.com/autosconsume...x.cfm?id=14542

""While Honda offers Civic Hybrid buyers a choice of transmissions ?
a five-speed manual or a continuously variable automatic
transmission ? Toyota is marketing the redesigned ?04 Prius only
with a continuously variable unit. ""

HEY ROCKY, WATCH ME PULL MY HAED OUTTA MY ASS!!

I pointed these out in an earlier post, you're not listening sir.

Here's another news item on that subject to which you might listen:

http://www.autonews.com/article.cms?articleId=49869

Jobst Brandt

Here's another news item on that subject to which you might listen:

http://www.autonews.com/article.cms?articleId=49869

Jobst Brandt









Here's another news item on that subject to which you might listen:

http://www.autonews.com/article.cms?articleId=49869

Jobst Brandt









I'm not a subsciber, please paste it.

CVT's are coming