KymcoForum.com
Scooters - 125 to 300 => People GT 300i => Topic started by: Faber32 on January 22, 2022, 11:54:31 AM
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Hi everyone :) A question for the experts: my Gti 125 requires 18x14 rollers of 13.0 grams weight. I have a set of 18x14 12.0 grams Bando rollers. Do you think I should avoid a different weight or I can go with the 12.0 grams without too many consequences? I was wondering if the engine will rotate at too high rpms when accelerating. Thank you very much for help
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people will typically drop down a weight or two in a search for better acceleration. Most do this when going to Dr Pulley sliders. I dropped a gram in weight and noticed better acceleration (with no loss of top speed). The theory is lighter weights will give you better acceleration at a possible cost of reduced top speed. Will 1 gram in the rollers make a difference? Who knows, give it a try!
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Thank you. I've just read that usually an engine of that size has rollers in the range 10 to 15 grams. So probably the difference won't be so excessive. Anyway I'll keep the topic posted for future readers :)
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@Faber, did some testing on a LIKE 200i, maybe you have a look at this link...
Whether you're happy with your scoots performance depends on several factors as, weight, windshield, out in the flats, urban, temperature, etc.
https://www.kymcoforum.com/index.php?topic=30655.msg214654#msg214654
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Thank you very much :) I'll read all of it carefully
Update: after reading your interesting topic I think that a difference will be perceptible, so if I'll find enough time I'll try first with 13g. If I'll be in a hurry I'll order the genuine kymco ones (14g) just to avoid problems. I'll keep this posted, thanks again :)
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I've had the GTI 125cc in the past. The roller weight is very sensitive. 10g is too light and 11 too heavy. 10.5 is the sweet spot for that scoot.
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Hi and thank you. If I go to the Kymco parts website, it talks about 14g rollers. Probably we have different engines because mine is european?
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@Faber, since BANDO rollers are inexpensive, just have a try with even 15 grams (gives you a calm middle speed with low revs). Order several weights and put it in, then test ride. Mixed (i.g. 3x12 and 3x15 grams) is possible too. All depends on your personal likings.
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Ok, I'll do some attempts. I'll let you know, thanks
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@Faber, since BANDO rollers are inexpensive, just have a try with even 15 grams (gives you a calm middle speed with low revs). Order several weights and put it in, then test ride. Mixed (i.g. 3x12 and 3x15 grams) is possible too. All depends on your personal likings.
The 125cc has large rollers. 15g are wayy too big for this scoot. Wouldn't have enough horsepower or torque to take off.
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@agilebda, with all respect I disagree. Takes (admittingly) off slower, but still has enough performance to give a smooth midrange cruising, and saves fuel.
Exemple: just for fun I tried on my GD 150 19.5gr
NON original squares (similar to TechPülley) and the scoot is still driveaable.
Of course takes a while to get 'em galopping, but it's fun to experiment with.
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Hey Faber please let us know what ya come up with and whatcha think.
For what it's worth, here in the U.S. I've generally found going a gram lighter's worth the bit of mpg, but I also live in a pretty hilly area.
It's also of note that you can mix weights a bit so if 12 g is too much one way and 13g too much the other, even number of both evenly spaced would yield the equiv of 12.5g. Fair warning I ain't done it personally, but more 'n a few folks have on various models. If you try it and it don't feel right swap it back to what worked before.
If ya want to get all fancy and read a bit check this out http://www.scooterfocus.com/scooter_variator_tuning_roller_weight.html
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@Tromper: for sure I'll let you know. Within a few weeks I'll do it. My People with genuine belt was good, had a decent acceleration. Then 2 years ago I put on a Bando new belt and it lost a little acceleration. It's as if from 30 to 60 km/h it lacks of power and struggles revving high. I hope with 12g rollers it will regain the lost "power". I'll let you know the result :)
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@Tromper: for sure I'll let you know. Within a few weeks I'll do it. My People with genuine belt was good, had a decent acceleration. Then 2 years ago I put on a Bando new belt and it lost a little acceleration. It's as if from 30 to 60 km/h it lacks of power and struggles revving high. I hope with 12g rollers it will regain the lost "power". I'll let you know the result :)
While you're in there maybe put on a Kymco belt again
?
Stig
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I can't find the spec on the OEM belt vs. what you picked up (don't have that spec either), but the size and other dimensions of the belt do have some impact as well.
Normally when you change out a belt, even with OEM, you do lose a bit at first since the belt sits higher in the pulleys cuz it's a bit thicker.
When you changed out your belt did you change out your rollers as well, or leave the old ones in place?
@Tromper: for sure I'll let you know. Within a few weeks I'll do it. My People with genuine belt was good, had a decent acceleration. Then 2 years ago I put on a Bando new belt and it lost a little acceleration. It's as if from 30 to 60 km/h it lacks of power and struggles revving high. I hope with 12g rollers it will regain the lost "power". I'll let you know the result :)
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Thank you guys for your replies. When I replaced the belt, I left the old rollers (measured with a caliper they were still fine). I am almost sure the cause of the lack of acceleration was due to the OEM belt, it was basically the only thing I touched. It would be for sure a great idea to put on a new Kymco belt now. But the bando belt should be still good, I do few miles per year so 45 dollars for a new belt could be wasted money for me, but I'll think about it. I think the cause is the belt also because with mileage it's improving gradually. Probably with wear it works better. I'll keep this posted.
P.S.: does anyone remember the right direction of the rollers? It's the thin side towards clockwise looking all of them from upwards? Thank you :-)
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From the manual:
• The direction of all weight rolls is same.
The color side is towards to clockwise.
From the interwebs seems the same as well.
https://youtu.be/XbX3PfSLKwg
And sliders (my preference)
https://youtu.be/J37IA-mjx7A
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Thanks so much
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As promised I report the results of the job. I installed a new Kymco genuine belt with new kymco 13g rollers. Scooter is like new, awesome acceleration, no noises no vibrations. The Bando belt I put years ago was the problem.
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As promised I report the results of the job. I installed a new Kymco genuine belt with new kymco 13g rollers. Scooter is like new, awesome acceleration, no noises no vibrations. The Bando belt I put years ago was the problem.
Thanks for your report!
Yeah. Stock works!
KYMCO engineers usually know what they're doing :)
Stig
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exactly :) . I still have the little doubt that with the old Bando belt I put one or two rollers in the wrong direction but it would be difficult, so at 99% the belt was the problem. Thank you :)
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Hello,
I have a Kymco People Gt 300i and i had a strange experience whit malossi 20x14 14 g, rolers code: 66 9919.L0 .
I changed today my rollers from original 14g to malossi 20x14 14g rollers, the problem is that with the new rollers it's hard to pass 100km/h, until 80 km/h it has a very good acceleration and after that the scooter is losing power, i can hear the engine revving but it feels like the power is not sent to the wheel, it's hard to pass 100km/h.
I swaped back to original 14g and now the acceleration its good from 0 to 120 and its tops around 150km/h on flat road.
Did you have "strange" experience whit mallosi rolers? Do the rollers need time to "set in"?
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@lonutRS, welcome here.
Changing just rollers against MALOSSI products with the same weight is therefore not successful because a MALOSSI CVT has different dimensions than your OEM stuff (bigger diameter). Did alot of testing there.
Maybe this helps, pls read
https://www.kymcoforum.com/index.php?topic=30655.0
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Thanks Ruffus.
In theory they sayd that the malossi rollers should work whit original variator but its clearly they don't.
I was thinking that my belt its a bit worn out, even if i can't see that whit the naked eye, and whit the new rollers the variator pushes the belt on top and slips, its clearly that over 80 the belt starts sliping , it is possible?
Im tryng to find a logical explanation :) seen that the new rollers are the same in dimensions whit the originals.
Im courios if anyone instaled malosi 20x12 14g on original variator.
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Hmmmh, CVTs are simple but sophisticated transmissions, where several components compliment or fight each other.
As you say, theoretically should work....
Not to tell from distance.
Your counterspring behind your clutch is a factor too, that's why MALOSSI delivers new CVTs with a set of them.
Yes, a worn out (too small) belt cannot transfer performance.
A new belt, BANDO or MITSUBOSHI might be a good idea.
It's an interesting field, there are zillions of videos around.
If you do have some money left over, try Dr.PULLEYs or TechPülley squares/gliders.
BANDO rollers are fine too and last.
A very important step IMO is to polish the CVTs inner ramps. NO lube at all there.