KymcoForum.com
Scooters - 125 to 300 => Super 8 150 => Topic started by: lukasbasic on March 29, 2017, 12:51:42 AM
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I replaced my CVT roller to 12 Gram which I ordered a while ago to increase acceleration (which it did very slightly). my top end is exactly 52mph.
since I moved to the country side, I need better top end instead of acceleration.
what weight should I buy? how much difference can it make?
when I got my kymco new, I could go 55 easily, after 4 years or so, i barely get to 52. another reasons for this? the tension on my throttle cable is good.
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Sounds a bit light. My S200 (same motor but carb'd) would crawl up to 60 pretty reliably.
Your plug good? How's the belt ?
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the belt from beginning.
any idea where can I buy belt online? i think it slips
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The S uses the same belt as your Super 8.
I picked up a super special elf-made Malossi uber kevlar belt for the S from Scooterworks last year, no issues last I heard, but I did sell the scoot a couple thousand miles after I installed it.
Scooterworks has the worst price on belts so I'd shop around a bit vs. buying from them. I had ordered a bunch of other stuff from them, so shipping was already covered & I was pressed for time, or I would have as well.
You may also want to check the forums and see if any other brands, Dayco, & Gates for example, are any good. I believe they run a bit cheaper, but there were some questions about life and durability when I checked.
Do be a bit leery of Ebay of course. unless the seller has a significant history.
There were a few reports a while back of folks getting either the wrong belt & the runaround on exchange/refund, or a belt that was very obviously the cheap knock-off (made of used chewing gum) vs. what the auction stated.
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Kymco Parts Monster has the belt. I highly recommend getting the original Kymco OEM belt. You cannot go wrong with them. Have you adjusted the valves, changed the spark plug, checked the air filter? What year and how many miles are on your scooter?
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scoot is 2003, 5600miles. reading that belt should go futher....
i weigh 250 and gave him hell as a daily commuter in L.A.
like you mentioned I need to adjust valves, wasn't done since 2k or so. plug was changes at 2k as well. air filter at 2k as well.
time to do some spring cleaning....
ordered 17g rollers as well, curious to see what diff it will make
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Not sure how it'd play on the Super 8, but the Dr. Pulley sliders were a huge bump up for my S. Restored top end to 60ish, & mostly killed the flat spot in the mid 30s. I used stock weight but should have gone a notch light I think..tough to say. The SYM I run on stock pulleys, seems to do just fine and reports are that the sliders don't do much with 'em, so your results may vary.
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I would replace the belt. Even though it only has 5600 miles on it, it is 15 years old. Likely has wear due to dry-rot. I wouldn't trust that belt. I recommend replace the belt, adjust valves, and put stock roller weights in. (That's what it had when it ran faster) In my experience, going with heavier weight limited top rpms and speed. I am certain you will get this worked out. :)
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sorry typo, scoot is 2013, 5 years old. I just checked the belt, looks good.
I replaced the rollers, some cheap OEM 12g for some less cheap 'performance' style 17g. look like pulleys, just cost 1/3
accel is noticable lower, top end +1mph. 53 instead of 52.
i'm disappointed. the rollers really don't seem to make a differnence.
I have a new spark plug coming and an air filter, but I have a feeing that there is no easy way to increase top end
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Overall that sounds roughly 10mph slow. The S (same motor similar weight with carb) got about 60ish in the flats with my fat butt on it. Cruise speed was more comfortable ~50-55 on down. You check your injector? Was a fellah on the cannonball had the one in his yager die on him. They do go out, &/or get clogged.
Also, is that extra 10mph going to be 'nuff for your area? In the end I found that a bit light around here.
I chose the SYM over the Ssince the power difference was roughly 10mph. The S topped ~60 as noted, the SYM ~70 with the ability to cruise comfortably without killing MPG at 60 vs. 50.
The S was simpler (air-cooled 2 valve vs. water-cooled 4 valve), roughly bullet proof. The SYMs ain't china bike bad, but overall you need to stay on top of it more.
Possibly time to look at some other bikes.
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Lucas, when you got your scooter new, it ran 55 mph with the 15 gram stock rollers in it. Going lighter did not improve top end. Going heavier did not improve top end. Perhaps you should go back to what was proven to have worked, the stock 15 gram rollers. In my experience, heavier weights actually decreased top end because they did not allow the engine to spin up to the maximum designed rpms. I know the frustration you are going through. Been there.
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Trumper: countryside WI, everybody goes 55-60. if you go 50 they overtake you. trying to squeeze some extra juice out of it for fun. I have a cruiser too, this is just the fun bike I can take into pieces lol.
the injectors is a good idea....i noticed bike is hesitating when launching often, sea foam does help for a while, but comes back quickly
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Trumper"
Let's keep that at "Tromper".....
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replaced spark plug, adjusted valves, replaced air filter - were all off/dirty - 52mph, no difference
last thing I have coming is 15g rollers, I do feel that the 17g might in fact slow it down 1-2mph, due to rev limiting
also dumped a carb/injector cleaner into the tank, maybe it will help some, don't feel like doing more advanced work for an extra 2mph.
I guess loosing some weight will help a bit too.
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replaced spark plug, adjusted valves, replaced air filter - were all off/dirty - 52mph, no difference
last thing I have coming is 15g rollers, I do feel that the 17g might in fact slow it down 1-2mph, due to rev limiting
also dumped a carb/injector cleaner into the tank, maybe it will help some, don't feel like doing more advanced work for an extra 2mph.
I guess loosing some weight will help a bit too.
I believe that will get you back up to speed. One small thing, have you checked your tire pressure? I am absolutely with you on losing weight! (But spending money on parts is easier for me :))
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yeah I did tire pressure is fine. still have stock tires on it.
man those 17g roller truly suck.
I believe that will get you back up to speed. One small thing, have you checked your tire pressure? I am absolutely with you on losing weight! (But spending money on parts is easier for me :))
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I did put 15g rollers back in. I reach about 51mph max. I think the 17g put me at 52-53mph max.
I don't know if its because they are more cheap rollers. but honestly I won't pay 50+usd for pulleys, just to learn that i get maybe +1mph.
I did replace the spark plug with NGK standart. before I had performance brisk plug. it sounded differently, and I think it prob gave me another 1-2mph.
so after doing, engine oil, cvt oil, valve adjustment, rollers, plug - I lost 1-2mph lol. (probably because of plug)
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guys, so my wife, which weighs 80 pounds or so less, got EXACTLY the same speed as I - 52mph straight road. slight uphill thing drops to 48 or so.
something is wrong here.....I wonder if engine took some damage, some time ago, when I did oil change, only 200ml / 8oz came out.
I didn't check it forever then...I know those things eat oil even when new.....
I also noticed some oil residue on the CVT and air filter cover, no idea where this is coming out. engine sounds good......
how hard is to do carb/engine components stuff ?
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Is your oil level OK right now? Did you replace the crush washer when you changed the oil and torque it to spec? If your oil level is OK, chances are you are not burning or leaking too much and that is a good thing.
Have you checked the "puke tube" for oil? That is the clear plastic tube that runs straight down from your breather towards the ground. Has a simple clamped cap on the end.
The carb is a relatively simple and easy thing to work on in my opinion. A proper cleaning requires the jets to be cleaned with a fine wire and some cleaner. There are a lot of videos on this. Just look for GY6 carb cleaning.
Oil on the outside of your CVT and air filter cover indicates an external leak somewhere. Oil inside the CVT cover would be much more problematic. I would expect that scooter to have a gps verified max speed between 55 and 60 on flat ground.
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guys, so my wife, which weighs 80 pounds or so less, got EXACTLY the same speed as I - 52mph straight road. slight uphill thing drops to 48 or so.
Weight has very little affect on top speed on level ground. Weight affects acceleration and speed going up hill. The reason big people tend to have lower top speeds is because they are bigger and create more wind resistance. Weight does create sightly more rolling resistance but has a small affect compared to wind resistance at high speeds. On the flip side a heavier person should be able to get higher speeds going down hill.
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Mr Paul: so i replaced the carb with chinese for .20 usd (thing sucks I know that). emptied puke tube
the carb prob gave me -1mph at best lol. but doesn't die when cold/idle.
might clean the kymco one and put it back at some point.
going to to install new fuel filter (chinese was leaking), have new variator, belt and clutch pad. if those things don't do it I'm done with this thing.
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Mr Paul: so i replaced the carb with chinese for .20 usd (thing sucks I know that). emptied puke tube
the carb prob gave me -1mph at best lol. but doesn't die when cold/idle.
might clean the kymco one and put it back at some point.
going to to install new fuel filter (chinese was leaking), have new variator, belt and clutch pad. if those things don't do it I'm done with this thing.
Sounds like a good plan to me. Man, I admire your tenacity!
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guys, every time I put a chinese part from ebay into this thing, the scoot looses 1-2mph. so after replacing variator the thing goes around 48mph on a straight road.
I'm done. will prob donate it or do a non operation once registration expires in september. after 5 years of heavy riding in busy city traffic this thing is beaten down badly overall. the steering column is loose, weird noises coming out everywhere, plastics are broken off. oil leaking somewhere. 5 years/8k on this thing is like 15-20 years on a car.
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guys, every time I put a chinese part from ebay into this thing, the scoot looses 1-2mph. so after replacing variator the thing goes around 48mph on a straight road.
I'm done. will prob donate it or do a non operation once registration expires in september. after 5 years of heavy riding in busy city traffic this thing is beaten down badly overall. the steering column is loose, weird noises coming out everywhere, plastics are broken off. oil leaking somewhere. 5 years/8k on this thing is like 15-20 years on a car.
I learned the hard way to replace parts with Kymco OEM. It saves money in the long run and preserves performance. My People has 14000 miles and still runs like a top. (With Kymco Parts) I hope you dont give up on riding. Go out there and find you another one!
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My Super 8 has over 28,000 miles on it. Except for the air filter I have used OEM parts. I made a foam air filter which can be washed and reused. It doesn't seem to have any affect on performance.
Mine normally will get up to about 68 on the speedometer. That's the same top speed as when it was new. I have seen 73 going downhill.
Still looking good for a 2009 with 28K miles on it:
(http://i645.photobucket.com/albums/uu171/wknudsen/2017%20pics/P5120014_zpsgijdecea.jpg)
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Lukas, it seems to me that if you make a speed run, then a lighter, more compact rider does, and gets the same speed, you must be running up against the cdi limiter, or, the gearing is the limitation.
Start doing the math on sprocket upgrades and see where the optimal balance is... Crudmuffins! That ain't gonna work, here, is it.
OK, over-inflate both tires when She runs... Then try a taller tire, on the rear drive tire.
It's possible, since the goal is top speed, level ground, you might shave the inside of the front variator so it closes together a little more, which will increase your ration and go faster.
Make changes to the rear variator so it does not close inwards fully, to create a ratio better for high speed.
...and all this is gonna destroy your low end capability. Sry...
redk