X-Pro 150cc // Vader 150 // Lifan 150 - Page 4

ProDigit · 08-11-2024, 08:01 PM

With the gears completely maxed out at 19/29t, and the rear tire increased by one size from 130 70 12 to a 140 70 12, resulting in 53% higher gearing, I did an mpg run on a fairly consistent road, doing between 25-40mph the majority of the ride (most was between 30-35mph), in 5th gear (3-4k rpm) with an occasional stoplight or two.

It was a 45 mile trip to, and 45 miles back.

The mpg recorded was 89mpg, and that was very stingy, as I filled up the tank with more than was in it in the last tank.

I feel the bike now gets up to 50mph GPS more easily, because the bike accelerates much better below 5k rpm.
There's something about the intake, I guess, or resonant frequencies, that cause the engine to have less power between 5-6k rpm. Almost as if the engine gets much less air or something. Could be the length of the air intake, and carburetor, but I don't really know.
Anyway, the bike is much more suitable for cruising below 50mph, which is what 90% of my rides are around here anyway.

I'm happy to get over 80mpg on this thing, though the riding style doesn't accurately represent most of my rides.
The high mileage is mostly to thank for keeping the revs below 4500rpm.
Gas mileage goes down at around 5k rpm cruising (50 mph GPS) as this is wide open throttle.
I'd have to tuk, and then it'll accelerate to beyond 60mph in 5th, or downshift to 4th, where I can reach 60-65mph easily, before upshifting to 5th gear.

During the ride, Even with the significantly better padded seat and raises handlebars, I still managed to get sore shoulders and back.

I did the same ride on my Lifan Xpect, at an average of 5mph faster, and will see mpg numbers probably around next weekend.

bigdano711 · 08-11-2024, 08:58 PM

Every now and then, just for poops and laughs, throw a pic in there. I sure as hell ain't reading all that crap.

ProDigit · Yesterday, 10:42 PM

I recently did another highway run, and while tucked, behind a car, and with a tail wind, I got highest top speed with stock tires and a 19/29t sprocket setup, I found with the bigger diameter rear tire (140 70 12) from stock (130 70 12) resulted in a loss of about 2-3mph top speed.

In order to combat those losses, I will do what I did with my Honda Rebel 250, and can be done with any carbureted bike, is add about 1oz of 2stroke oil for each gallon of fuel.
This will lubricate the top side of the piston.
I was actually surprised the Honda mechanics could see the oil even on my VT750, but couldn't locate any leaks.
I told them it was a fuel additive, but in actuality it is 2 stroke oil.

1oz of oil per gallon of fuel is easy to remember. That ratio is 1:128.
The effect is noticeable from 1:100 to 1-300, with 1:100 giving exhaust fouling,and possibly bad for the catalytic converter, and 1:300 ratio making nearly no difference compared to just fuel without oil.

On the Vader 150 with a 1.5 gal fuel tank, I think 1oz of 2 stroke oil per tank will be close to ideal (1:200).
It should increase torque and top speed.
One of these days I'll test it out on the Vader.

I'd be much more cautious on a fuel injected bike, since the oil could throw off the stoichiometric ratio of the combustion, requiring more fuel per air to be injected.
The exhaust deposits could also clog catalytic converters, and clog or immobilize O2 sensors.
Maybe If I ever get tired of my Xpect, I'll do some testing on that with adding oil to the fuel.

Using used or new engine oil won't work as effectively as 2 stroke oil, and show a lot more smoke. Using used oil can also clog injectors, carburetor jets, fuel filters etc ...

08-11-2024, 08:01 PM	#46
ProDigit Join Date: Aug 2013 Posts: 271	With the gears completely maxed out at 19/29t, and the rear tire increased by one size from 130 70 12 to a 140 70 12, resulting in 53% higher gearing, I did an mpg run on a fairly consistent road, doing between 25-40mph the majority of the ride (most was between 30-35mph), in 5th gear (3-4k rpm) with an occasional stoplight or two. It was a 45 mile trip to, and 45 miles back. The mpg recorded was 89mpg, and that was very stingy, as I filled up the tank with more than was in it in the last tank. I feel the bike now gets up to 50mph GPS more easily, because the bike accelerates much better below 5k rpm. There's something about the intake, I guess, or resonant frequencies, that cause the engine to have less power between 5-6k rpm. Almost as if the engine gets much less air or something. Could be the length of the air intake, and carburetor, but I don't really know. Anyway, the bike is much more suitable for cruising below 50mph, which is what 90% of my rides are around here anyway. I'm happy to get over 80mpg on this thing, though the riding style doesn't accurately represent most of my rides. The high mileage is mostly to thank for keeping the revs below 4500rpm. Gas mileage goes down at around 5k rpm cruising (50 mph GPS) as this is wide open throttle. I'd have to tuk, and then it'll accelerate to beyond 60mph in 5th, or downshift to 4th, where I can reach 60-65mph easily, before upshifting to 5th gear. During the ride, Even with the significantly better padded seat and raises handlebars, I still managed to get sore shoulders and back. I did the same ride on my Lifan Xpect, at an average of 5mph faster, and will see mpg numbers probably around next weekend. __________________ Last edited by ProDigit; 08-12-2024 at 08:48 PM.
	1

08-11-2024, 08:58 PM	#47
bigdano711 Join Date: Jun 2023 Location: Big Piney, WY Posts: 563	Every now and then, just for poops and laughs, throw a pic in there. I sure as hell ain't reading all that crap. __________________ 2023 Hawk 250 from XPRO off of Amazon MOUNTAIN MAN RC + MOTO on YouTube "If there were more bloody noses, there would be less wars." - Hagbard Celine "Someday, after mastering the waves, the winds, the tides and gravity, we shall harness for God the energies of love and then, for the second time in the history of the world, man will have discovered fire." - Pierre Teilhard de Chardin
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Yesterday, 10:42 PM	#48
ProDigit Join Date: Aug 2013 Posts: 271	I recently did another highway run, and while tucked, behind a car, and with a tail wind, I got highest top speed with stock tires and a 19/29t sprocket setup, I found with the bigger diameter rear tire (140 70 12) from stock (130 70 12) resulted in a loss of about 2-3mph top speed. In order to combat those losses, I will do what I did with my Honda Rebel 250, and can be done with any carbureted bike, is add about 1oz of 2stroke oil for each gallon of fuel. This will lubricate the top side of the piston. I was actually surprised the Honda mechanics could see the oil even on my VT750, but couldn't locate any leaks. I told them it was a fuel additive, but in actuality it is 2 stroke oil. 1oz of oil per gallon of fuel is easy to remember. That ratio is 1:128. The effect is noticeable from 1:100 to 1-300, with 1:100 giving exhaust fouling,and possibly bad for the catalytic converter, and 1:300 ratio making nearly no difference compared to just fuel without oil. On the Vader 150 with a 1.5 gal fuel tank, I think 1oz of 2 stroke oil per tank will be close to ideal (1:200). It should increase torque and top speed. One of these days I'll test it out on the Vader. I'd be much more cautious on a fuel injected bike, since the oil could throw off the stoichiometric ratio of the combustion, requiring more fuel per air to be injected. The exhaust deposits could also clog catalytic converters, and clog or immobilize O2 sensors. Maybe If I ever get tired of my Xpect, I'll do some testing on that with adding oil to the fuel. Using used or new engine oil won't work as effectively as 2 stroke oil, and show a lot more smoke. Using used oil can also clog injectors, carburetor jets, fuel filters etc ... __________________
	0