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Post by jbjhillbilly on Aug 29, 2018 1:41:47 GMT -5
Why do think the airsal works better with a 24mm carb? I only ask because I have just bought the airsal kit, I was thinking maybe going with a 20mm carb. You need a larger carb Because with the larger cylinder, you need more fuel to fill it effectively for detonation.
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ratdog
Scoot Enthusiast
Posts: 342
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Post by ratdog on Aug 29, 2018 1:44:29 GMT -5
BTW, in the title, you have "consumes a lot" but ran out of space before telling us what it consumes a lot of. Hope the next word wasn't going to be "oil"
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Post by cristian on Aug 29, 2018 3:02:49 GMT -5
Hi everybody,
Let me just start by expressing my gratitude for the opinions stated above. I wish there were in my country mechanics and specialists like you.
First of all, my scooter consumes about 3.8 liters of gasoline per 100 kilometers. That's about 61 mpg. I live in Romania and we use the metric system here.
The scooter used to eat around 2-3 liters per 100 km with everything stock. I have a friend with a 250 cc scooter eating 4, so definitely mine is eating a lot.
I think it's obvious that my mechanic is not that good and, to be frank, there aren't too many motorcycle/scooter specialists around here.
Basically, I found one who is supposed to be very good. He used to work in Italy for 7 years in a Kymco service shop.
Unfortunately, being good, he has loads of work and he has asked me whether I can come to his shop around the end of the season (i.e. November, December) to have enough spare time to check everything.
He said that it would be much easier if I swapped the engine with a 125cc. What do you think?
In the meantime, I think I will start feeding super unleaded gasoline (I used to put standard, as I didn't know any better). Pulling should be acceptable, however when I reach 60-65 kmh (37-40 mph), revving is hard, I think it's way over 9,000 RPM. And I will definitely get a tachometer.
And when I get to the shop, if I do not put in the 125 cc engine, I will do the following: - check if there is a restriction in the exhaust; - check if the airsal kit is properly installed and tuned; - if pulling from stand-still is ok, I will change the secondary gear kit for a 16x50 gear I found in an online shop in Germany. This should calm dowm the revving, but easier to pull, as someone said that a performance gear is like rennouncing to the first gear :-)
What do you think? I would order the parts from the US, but I don't think they deliver in Romania.
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ratdog
Scoot Enthusiast
Posts: 342
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Post by ratdog on Aug 29, 2018 6:45:38 GMT -5
Some of the reason we do all this stuff is because we love working on these bikes. The GY6 family is fun because there is a huge pool of aftermarket parts and the parts are cheap! From what you can see in my “ new project” thread, I’m screwing with a bike, just for the fun of screwing with it. At what I used to get paid an hour, Earsplitenloudenboomer would be about a $5000 bike by now. You are not doing your own work, and frankly don’t want to spend all your money doing upgrades. I think an engine swap would be a perfect way to go for you. If he can do the 150cc, I think that would be better, but the 125 cc still should give you a turn key scoot that will do 90 Kph with no fuss.
I thought in your orginal post you said you already had a lower final drive ratio gear set. What happen to that, did you not keep it? Did the guy doing the work keep it or something?
Get and install a tach ASAP. You don’t have to keep it beyond getting this bike running right, so , once done, you can go back to the look you like. There is a lot of things I would love to see you do, but I reall think you should just save your money for a new engine. We have a saying... “there is no substitute for cubic inches” (OK, in your case “ no substitute for CCs”)
Over here, most states require a special endorsement for riding motorcycles. Bikes under 50 cc need no endorsement, no plates, no insurance. So lots of guys by the 50s to get those advantages. But , of course, soon get tired of the top speed in thee 30s and start modifying them. To be honest, they no longer qualify as “ mopeds” but hey, no ones going to know any better.
So YES, do the engine swap to a 125 or 150 (if he can do that one). You will be much happier and frankly the motor will last much longer then what you have now
BTW, over here, a lot of us order parts directly from China. I think the Chinese government must subsidize shipping to the US because shipping is very low cost and often free
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Post by cristian on Aug 29, 2018 7:19:31 GMT -5
Hi ratdog,
Thank you very much for your opinion. Most likely I will do the swap. It is also cheaper than fine tuning the current scooter.
This guy can bring me a 125cc engine from Italy for approx. 250 USD.
Is there anything else I should change? Sorry for switching the subject.
In my country, you can ride a 50cc scooter with just the car driver's license. But you need to register the scooter with the city hall, you need insurance and you need a technical endorsement once every 2 years.
I remember that last year when I spent my vacation in Italy, a guy rented me a 125 Vespa and he told me that in Italy you can ride up to 125 with the car driver's license. My wife simply adored the speed and stability.
Now, next spring I will apply for a motorcycle permit. Once I get tired of the Kymco Like, I will get something bigger.
I don't want to sell the Like and buy sonething bigger NOW because I bought it as new and I will lose a lot of money selling it.
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Post by magoconnor on Aug 29, 2018 7:24:19 GMT -5
Actually, we find that all of the 50mm kits we sell run well with the 24. It's an affordable option that pairs well with 50-52mm kits. The results of in-house R&D. We've installed and tested and on a street build... it just works.
Matt Hi Matt. How high do you have to go in main jet, to make it work with 80cc ? (of cause its differs from bike to bike) Also how big was the improvment compared to lets say, a 20mm or stock carb? Cheers Mag.
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Post by fugaziiv on Aug 29, 2018 8:38:46 GMT -5
Hi Matt. How high do you have to go in main jet, to make it work with 80cc ? (of cause its differs from bike to bike) Also how big was the improvment compared to lets say, a 20mm or stock carb? Cheers Mag. Here at sea level, we've seen these work quite well with the stock jetting. On our test bike, we literally stuffed it on as it is out of the box and it ran great. It doesn't run out of breath at the top compared to a 20mm, but it is somewhat more thirsty. Adjusting for altitude and bike differences are in our experience just a step or two up or down on the main (say a 100 or a 105, the carb ships with a 102), but the only way to know for sure is to read the plug. When doing a BBK build, it's always good to have a selection of jets on hand anyway. We've got a kit for that too. For anyone doing tuning, it's just a good idea to have a selection of jets on hand. www.partsforscooters.com/114-48-Main-Jet-Kit-CVK?sc=38&category=138722Matt
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Post by cristian on Aug 31, 2018 5:13:55 GMT -5
Does anyone know, if I swap the engine with a 125cc, do I need to replace anything else? Like, for example, transmission? I know that the engine comes with its own carb.
Thanks, Cristian.
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ratdog
Scoot Enthusiast
Posts: 342
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Post by ratdog on Aug 31, 2018 7:10:29 GMT -5
Just like your current unit, the engine and trans will be one unit. You are having this done by a professional, It should be turn key. He should be replacing anything that needs to be as part of the conversion.
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Post by cristian on Aug 31, 2018 7:14:02 GMT -5
Thank you!
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Post by cristian on Mar 9, 2019 3:23:04 GMT -5
Update: I have finally figured out what happened and repaired my scooter.
So, in case anyone wants to learn from my experience, here it is.
The cylinder was not properly installed and it was losing compression. Furthermore, oil was leaking on the head.
The mechanic who repaired my scooter told me that the segments were not installed in good order and acrually furned 180 degrees from yheir standard position. He also cleaned ghe cylinder head and put back all things together.
So, now I take off from standstill faster than most cars. I reach 60 kmh in no time, maximum speed is 80 kmh which is were I wanted it.
Just a reminder of the "goods" installed: - Airsal 80 cc cylinder - Malossi Multivar 2000 Variator with 6g rollers and white contra spring - 17/49 gears.
Scooter runs perfectly. I only have one concern - in cold mornings, it barely start on the button. I am almost killi g the battery. So, I have to kick it a few times. Due to the compression of the cyli der, the kick start is very hard.
The mechanic told me the Choke of the carburator might have an issue and I should go back to check it.
Are these things normal?
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Post by 90GTVert on Mar 9, 2019 12:02:55 GMT -5
Thanks for updating with the solution.
It's pretty normal for the battery to be weak when it's really cold. If it runs fine once you get it going and it's not an issue in warmer weather, then I would assume it's the cold affecting the battery.
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Post by pinkscoot on Mar 9, 2019 12:28:36 GMT -5
How cold is cold?
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Post by GrumpyUnk on Mar 11, 2019 11:25:34 GMT -5
Christian, you might try twisting the throttle open 3-4 times to squirt in a little extra fuel before starting. The extra would be more likely to vaporize than a lean mixture when it is cold. It would work in conjunction with the choke to enrich the mixture, but would be gone after the engine started, relying upon the choke to keep it rich enough to run. The only part I could figure to be installed 180 out are the base and head gaskets. The base gasket would prevent oil flow to the rocker arms & cam if installed incorrectly. Head gasket may leak if incorrect, or cause oil leakage. Either way, good to have them done properly. If you were still getting high rpm readings, and poor acceleration, I would have recommended checking the fit of the drive belt. A worn belt can allow slippage, and thus poor acceleration accompanied with high rpms. With the replacement cost low, it is a good think to check and replace if there is doubt, or the belt has served its time in service and is due proper retirement.. perhaps as an emergency spare? tom
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Post by cristian on Mar 12, 2019 12:42:47 GMT -5
There are 4 degrees Celsius in the morning. This is like 39 fahrenheit.
Yes, this is the only thing I might try to solve.
When it's warm, it starts immediately. When it's cold, it's difficult to start.
Even today, I had lunch with a client and parked the scooter in front of the restaurant. In the cold. And when we left, the guy wanted to see the scooter and he got bored before I managed to start it.
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