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Post by Deleted on May 21, 2015 15:38:30 GMT -5
Hi,
I have a 80cc motor (GY6 139qmb) on my scooter with a 20mm carburator. Inside the carb, main jet #100 and Pilot jet #35.
I always run with the original air filter (No restriction inside) and original muffler, if i put main jet under #100, the sparkplug always look lean|?
Now with jet #100 look good, run good too.
But i have a question,: Do you think if i put a UNI filter is going to help the motor, or just make more noise???
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Post by geh3333 on May 21, 2015 17:38:32 GMT -5
Hi, I have a 80cc motor (GY6 139qmb) on my scooter with a 20mm carburator. Inside the carb, main jet #100 and Pilot jet #35. I always run with the original air filter (No restriction inside) and original muffler, if i put main jet under #100, the sparkplug always look lean|? Now with jet #100 look good, run good too. But i have a question,: Do you think if i put a UNI filter is going to help the motor, or just make more noise???The stock filters and boxes are a restriction themselves . the uni will let in more air. |
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Post by dmartin95 on May 21, 2015 18:43:02 GMT -5
I'm with Geh333... Go with the UNI....
However, you may want to go up to a 102 or even maybe a 105 if you go with UNI...
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Post by Deleted on May 24, 2015 20:33:17 GMT -5
This is the picture of the spatkplug after a 5 miles ride! The main jet is a #100!  What do you yhink if i put a main jet ##110? |
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Post by lain on May 24, 2015 20:49:43 GMT -5
I'd say keep going till it's too much then go back one.
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Post by millsc on May 24, 2015 20:55:01 GMT -5
I'm running a hoca 52mm kit with a hoca big valve head and uni i run a  in my 20mm carb I go by the way it sounds and runs. I can tell by the sounds and how it behaves if its lean or rich I don't check plugs anymore. Your plug check won't be accurate if you don't run wide open anyways you can just ride and not be wide open and have a lean plug if it's lean at idle or midrange. |
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Post by onewheeldrive on May 25, 2015 0:11:53 GMT -5
So exactly what liquid is all over your spark plug threads?
EDIT: After giving it a second look, is it even wet? If not, forget about this post.
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Post by geh3333 on May 25, 2015 17:42:47 GMT -5
Holy sparkplug vermi !! That looks horrible. That thing is white and corroded after 5 miles ? And yeah, what is on the threads?
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Post by Deleted on May 25, 2015 21:45:51 GMT -5
On the threads it's a spark plug anti-seize, but i stop to use now, somebody said is not very good to use this... This is the plug with the original air box!  I'm going to buy main jet #102 and #105 and try again the uni filter later... |
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Post by geh3333 on May 25, 2015 22:35:44 GMT -5
That looks good. U def have to go up on the jet size with the uni.
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Post by Deleted on May 27, 2015 8:02:01 GMT -5
I'm going to stay with the original air box, i don't like the sound with a Uni filter....
It's too loud!
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Post by lain on May 27, 2015 8:42:02 GMT -5
On the threads it's a spark plug anti-seize, but i stop to use now, somebody said is not very good to use this... This is the plug with the original air box! I'm going to buy main jet #102 and #105 and try again the uni filter later... I have been using a very tiny bit of graphite lube on the base of spark plugs for over a year now with great success. Does not burn up or leave residue, can be simply wiped off the threads, and prevents threads from locking up on the spark plug so it is easy to remove with hand tools anytime you need to, but does not move or cause the spark plug to come out. Try it out, it's also very cheap and one can will likely last longer than your scoot. |
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Post by Noneshere on May 27, 2015 14:07:48 GMT -5
Uni filters good , just keep jetting up till you get rid of the white tipped ( lean ) plugs.
Caramel color is what you want .
Running lean like that will soon roast your valve sealing surfaces like the grand canyon.
Err always to the rich side. Keep it cool at ground zero
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Post by onewheeldrive on May 27, 2015 14:17:20 GMT -5
Is the 80cc actually the 72cc (some sell 72 as 80)? If so, that big carb must make a huge difference in jetting.
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Post by geh3333 on May 28, 2015 11:22:43 GMT -5
I'm going to stay with the original air box, i don't like the sound with a Uni filter.... It's too loud! If you want better performance , I'd stick with the uni and upjet. Its totally up to you . if your satisfied with the scoots performance then just stick with the stock setup. |
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in my 20mm carb I go by the way it sounds and runs. I can tell by the sounds and how it behaves if its lean or rich I don't check plugs anymore. Your plug check won't be accurate if you don't run wide open anyways you can just ride and not be wide open and have a lean plug if it's lean at idle or midrange.
