What's the most efficient factory scooter?

[Isaac Zackary]

Originally Posted by cRiPpLe_rOoStEr

Is the U.S.-spec PCX also fitted with start-stop?

No.

https://rideapart.com/articles/how-m...topstart-works

https://en.m.wikipedia.org/wiki/Honda_PCX

[Isaac Zackary]

Can the PCX's that Honda sells in the USA be modified to have an idling stop system?

[Grant-53]

In my area 40 mph is adequate in town so a 50cc Zuma or Stella would suffice as these have good local dealers. A full fairing could get speeds higher. Altitude and inclines would require a larger engine. Compression ratio is key to efficiency. Genuine has a 220cc air cooled scooter and the PCX 150 is the machine to beat overall.

[cRiPpLe_rOoStEr]

Originally Posted by Isaac Zackary

Can the PCX's that Honda sells in the USA be modified to have an idling stop system?

Probably it can be modified to have the idling stop, I'm just not sure if there's something to replace to incorporate this feature or if it's just a software reflashing.

[sendler]

Originally Posted by Isaac Zackary

Can the PCX's that Honda sells in the USA be modified to have an idling stop system?

Any motorcycle can do idle start stop very easily by manually using the kill switch and the start button.

[ProDigit]

Presuming you can change out the gears, the best motorcycle would be a Roketa MC-05-127.
It comes stock with 80MPG, and with a sprocket swap from 41T to 31T gets 120MPG at best; but disables it for highway use.
34T (105MPG) sprocket is about as low to go.

Also a Honda Grom 125cc is great for everything save the interstate.

Other than that, Honda's PCX150 is a good all rounder as a scooter, no interstate.
To have an interstate ready scoot, you'd have to go for a vespa or Piaggio 350cc scoot, or a Burgman (400cc).
You can also get a Linhai 250/300cc scooter; they'll make it on the interstate, but barely (75MPH).

A 50cc, if you can change the gearing is best for speeds upto 30MPH, if you keep the revs below 3,5k RPM, you could get 120MPG as well.
Revs to 7,5k rpm, and it can get you 42MPH, with 100MPG.

If it has a CVT, you're best off with a 100cc scooter.

What you NEED to get around anywhere, is a 250cc ptwin engine, like a Honda Rebel (top speed > 80MPH).
What you NEED to get around anywhere save on the interstate, is a 125cc scoot (top speed > 60 MPH).
What you NEED to get around town, is a 100cc (top speed of upto 55MPH).

What you optimally would want for:
Interstate and below speeds (80MPH): 350-400cc thumper (7.5k RPM), 300-350cc thumper high rev (10k RPM), 300-350cc ptwin low rev (<8k RPM), 300cc Ptwin high rev (10k).
Highway or below speeds (60MPH): 150cc ptwin bike low rev, or a 125cc high rev thumper.


Scooters take about 10% off the powerband, so add 10% to the cc size.

[DKaz]

Sorry to raise this thread from the dead.

North American Honda PCX 150 owners are regularly getting 90 MPG from the factory, that's without idle stop. The upcoming ADV 150 will have the same powertrain. A friend of mine who had one and driving on 90 km/h highways was regularly getting over 100 MPG.

It has a governed top speed of 104 km/h or 65 mph, the motor size and horsepower is similar to the Yamaha SMax 155 which is not governed and tops out at 120 km/h or 75 mph. When you go up a 6% grade however, the PCX is still doing very close to top speeed while the SMax drops down to about what the PCX is doing, so you're getting more consistent top speed with the PCX.

I don't know about the USA but the minimum speed on certain freeways where I am is 60 km/h. So it's freeway capable, but whether you're comfortable doing 100 km/h in a 100 zone where drivers are typically doing 110, 120, that's another story. I had a Honda CBR 125R before that had about the same performance as the PCX, and off peak it was ok, I was in the right lane and everyone can pass. Rush hour however, there I was in the HOV lane passing all those single occupant cars. It wasn't as efficient as the PCX but I was still doing 80 mpg on it without thinking of hypermiling.

[cRiPpLe_rOoStEr]

Originally Posted by DKaz

whether you're comfortable doing 100 km/h in a 100 zone where drivers are typically doing 110, 120, that's another story

Considering that I have even lurked about building a tricycle with a Honda CG 160 engine (mostly because it would be more comfortable to haul my dog around than in a motorcycle or scooter), after a guy who owns one based on an old CG 125 with the pushrod engine told me he could reach 90km/h on freeway, the ADV 150 would probably be suitable for me if I didn't have patellar chondromalacia.

[ASV]

I get about 140 mpg on a fairly heavily modified scooter
its a dirt common 150 gy6. It tops out at about 50 mph do to poor aerodynamics

[oil pan 4]

I have found my 50:1 oil 2 stroke motors run better with 40:1 to 45:1 gas. Seem to run smoother, stronger but I don't know if they suck down more fuel.