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Post by hojnikb on May 29, 2018 5:00:18 GMT -5
So what kind of mpg are you guys getting on this scooters ? I've bought a new one not that long ago and i'm getting 60-65mpg over the last few tanks. Is this normal ? I was honestly expecting higher mpgs, given this is a 4 stroke affair.
For comparasment, my old 2 stroke moped (also 50cc) with upgraded carb and exhaust usually yields 105MPG+.
Is this because it's not fully broken in yet ?
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Post by jaciche on May 29, 2018 8:02:29 GMT -5
It could very well be from the engine not being broken in yet. How many real miles are on your scooter now? Make sure you change the motor oil and gear oil asap if you haven't already. You should be getting eighty five-110 mpg based on your driving. It's been a while since I had my Roketa bahama 50cc so my memory isnt the best on 50cc 4T mpg, but ninety mpg seems to ring a bell as far as what I was getting with it.
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Post by hojnikb on May 29, 2018 10:00:25 GMT -5
It could very well be from the engine not being broken in yet. How many real miles are on your scooter now? Make sure you change the motor oil and gear oil asap if you haven't already. You should be getting eighty five-110 mpg based on your driving. It's been a while since I had my Roketa bahama 50cc so my memory isnt the best on 50cc 4T mpg, but ninety mpg seems to ring a bell as far as what I was getting with it. I've done around 200KM or so. Manual says for oil change at 300KM, then every 2000km. What kind of oil is usually recommended for 139 ? I'm seeing different reports for engine oil and 80W90 for gear... |
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Post by chewbaca on May 29, 2018 10:44:19 GMT -5
1
what rpm are you cruising at ?
for a fifty with a square bore max efficiency is around 5000 rpm
6 for best torque and 7 for best H power
2
The belt can really rob power if not correctly aligned and cooled down or over compressed
3
sometimes a scooter will be way over rich because of WRAAAAAR!!
on the brain
just as a reference I get about 100 to 115 mpg with a 150cc
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Post by jaciche on May 29, 2018 10:50:11 GMT -5
It could very well be from the engine not being broken in yet. How many real miles are on your scooter now? Make sure you change the motor oil and gear oil asap if you haven't already. You should be getting eighty five-110 mpg based on your driving. It's been a while since I had my Roketa bahama 50cc so my memory isnt the best on 50cc 4T mpg, but ninety mpg seems to ring a bell as far as what I was getting with it. I've done around 200KM or so. Manual says for oil change at 300KM, then every 2000km. What kind of oil is usually recommended for 139 ? I'm seeing different reports for engine oil and 80W90 for gear... Ok, so I'm guessing that your engine is just breaking in. When you change your oil in 100km, you will probably notice some small flakes in the oil due to the engine breaking in. Your fuel economy should get better after the first 1000-2000km is put on the bike. For motor oil, most scooter manuals recommend 15w-40. I run 10w-40 conventional oil in mine since its hard to get 15w-40 oil made for gas engines in America. If you ride in a very hot climate, 20w-50 is a good option too. You can run semi-synthetic or full synthetic in these if you so wish, but I prefer to run conventional oil due to the cost and how frequently the oil is changed. There is no need to get special motorcycle oil, just any motor oil around that weight will work well. You are correct on the gear oil type. |
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Post by hojnikb on May 29, 2018 12:43:32 GMT -5
1 what rpm are you cruising at ? for a fifty with a square bore max efficiency is around 5000 rpm 6 for best torque and 7 for best H power 2 The belt can really rob power if not correctly aligned and cooled down or over compressed 3 sometimes a scooter will be way over rich because of WRAAAAAR!! on the brain just as a reference I get about 100 to 115 mpg with a 150cc Stock weights seem to be tuned for around 6900rpm (according to rpm gauge i hooked up). Not sure about the belt though. It's the stock belt, that came out of the factory, i just checked it before i really started riding if its cracked (you can never be too sure with Chinese, even when new). I couldn't really say its running rich, judging by the spark plug color (coffee brownish). |
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Post by hojnikb on May 29, 2018 12:47:28 GMT -5
I've done around 200KM or so. Manual says for oil change at 300KM, then every 2000km. What kind of oil is usually recommended for 139 ? I'm seeing different reports for engine oil and 80W90 for gear... Ok, so I'm guessing that your engine is just breaking in. When you change your oil in 100km, you will probably notice some small flakes in the oil due to the engine breaking in. Your fuel economy should get better after the first 1000-2000km is put on the bike. For motor oil, most scooter manuals recommend 15w-40. I run 10w-40 conventional oil in mine since its hard to get 15w-40 oil made for gas engines in America. If you ride in a very hot climate, 20w-50 is a good option too. You can run semi-synthetic or full synthetic in these if you so wish, but I prefer to run conventional oil due to the cost and how frequently the oil is changed. There is no need to get special motorcycle oil, just any motor oil around that weight will work well. You are correct on the gear oil type. Ok great, 15W40 is readily available and cheap here. I'm assuming i should stick with mineral oil when the engine is breaking in, correct ? |
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Post by jaciche on May 29, 2018 13:27:15 GMT -5
Yup that's correct. After the engine breaks in, you can run whatever type you like.
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Post by chewbaca on May 30, 2018 11:45:27 GMT -5
I would add some mass to the rollers and drop the rpm to 6000
glue and filings, solder, aluminum foil, spring pins all cheap options that can work
when it comes to belt life and efficiency no other considerations are as important as cooling and alignment
so remove the filter on the CVT cover air intake at a minimum
its bad engineering and detrimental to everything inside the CVT
no other drive belt that I know of needs filtered air
but all need lots of cooling
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