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Post by Goosey on Nov 26, 2011 21:03:09 GMT -5
How light did you go with the new weights? How many grams?
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Post by richiekunz on Nov 26, 2011 21:16:27 GMT -5
Not Sure....but its really light then before
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Post by Goosey on Nov 26, 2011 21:32:15 GMT -5
I suspect you went too light on the weights. Do you have any kind of scale to check them out? I used a food scale at work  You don't need a real big change to effect performance. Dropping even 2 grams from stock can/may be all you want. 4.5 to 5 grams is a good weight for a 50cc, 12 grams is what I like in my 150cc, I could guess anything less than 8-10 gram is too low in a 125cc. Just a guess though. |
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Post by richiekunz on Nov 27, 2011 1:08:11 GMT -5
Yeah...mine was like 14x18 or what I forgot it  but I'm sure it got 18...I'll just stick to my old rollers then |
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Post by richiekunz on Nov 27, 2011 9:57:48 GMT -5
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Post by Goosey on Nov 27, 2011 10:08:32 GMT -5
18x14 is the size, then there is a weight in grams. www.ebay.com/sch/i.html?_nkw=dr+pulley+18x14&_sacat=0&_odkw=dr+pulley+14+x+18&_osacat=0&_trksid=p3286.c0.m270.l1313You use the same size as what is in my 150cc. I think the weight would be lower though. Find a way to weigh your original rollers. Changing the weights is a simple way to tune the transmission. Going a little lighter can help if you want to take off a bit quicker and improve going up hills. In my case, no hills, so just a minor drop to improve take off. Like the size of the jets though, you should know what you are changing from, and adjust to what you want it to do. Maybe you could ask a nice person in a deli or find a scale in the bulk herbs section of the grocery store where you weigh your own and label it The gram weight is for one roller. |
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Post by 90GTVert on Nov 27, 2011 10:11:26 GMT -5
None of the above? They look cool, but it doesn't look like any of them are made to fit a GY6. If you're just picking it for the muffler so you can mod the stock pipe to fit, choose whichever is closest to the pipe size you have and looks best, they'll probably all sound the same and involve a similar amount of fabrication.
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Post by richiekunz on Nov 27, 2011 22:10:31 GMT -5
Okay Goosey Thanks....I'll look for other rollers then.....
90GTVert Its hard to find performance Scooter exhaust here in Malaysia....yeah you could get it....but in very high price.....so I just choose to have those pipes....and Hope they gonna provide some power and Nice Sound
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Post by richiekunz on Nov 29, 2011 23:45:03 GMT -5
Is all Mikuni Carb main Jet are same? what happen if my jet too big ?
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Post by 90GTVert on Nov 30, 2011 8:50:23 GMT -5
No, there are multiple kinda of Mikuni jets. Sites like JetsRUs.com show measurements to help you figure out what you need.
If the main jet is too big it runs rich and perfroms poor. Sometimes it'll sputter and smoke if it's really rich. It should darken/blacken the spark plug after a little riding if it's too rich.
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Post by richiekunz on Nov 30, 2011 9:24:02 GMT -5
if I buy the Carb Repair Kits are the Main Jet Stock or Bigger ?
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Post by 90GTVert on Nov 30, 2011 9:37:50 GMT -5
I would assume stock... but stock isn't always even the same from scoot to scoot.
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Post by richiekunz on Dec 3, 2011 2:35:38 GMT -5
Okay
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Post by rocketdog on Dec 5, 2011 20:38:09 GMT -5
if I buy the Carb Repair Kits are the Main Jet Stock or Bigger ? In a stock 24mm 150cc carb Keihin clone, I've seen main jets from 1.03 to 1.07. I bet yours was in there even if it is a 125cc. RD |
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Post by richiekunz on Aug 11, 2012 7:37:03 GMT -5
Hey Guys ! Urgent I need help  If main jet drilled too big its gonna be like the same as its too small ? coz when its too small i got the problem.....after i drilled too big the problem become worst....even without an Air Filter it still same help ? |
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You don't need a real big change to effect performance. Dropping even 2 grams from stock can/may be all you want. 4.5 to 5 grams is a good weight for a 50cc, 12 grams is what I like in my 150cc, I could guess anything less than 8-10 gram is too low in a 125cc. Just a guess though. 
but I'm sure it got 18...I'll just stick to my old rollers then 
