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Scooters - 50cc => Agility 50 => Topic started by: Kenho21 on July 16, 2012, 03:06:58 AM

Title: Main jets... again...
Post by: Kenho21 on July 16, 2012, 03:06:58 AM
anyone know the measurements of the main jet?
Title: Re: Main jets... again...
Post by: baddi on July 16, 2012, 03:14:49 AM
The threads are M5 :D
Naraku M5 jets will fit and you can buy them in packs of 10 sizes, with 2 size between them. :)
Title: Re: Main jets... again...
Post by: Kenho21 on July 16, 2012, 03:25:44 AM
Yea, just bought a set (100-120), but I need bigger.
Title: Re: Main jets... again...
Post by: Kenho21 on July 16, 2012, 03:26:54 AM
Probably gonna get a torch tip cleaner set and start makin my own though, I don't even wanna know how much I've paid just for jets over the last couple years.
Title: Re: Main jets... again...
Post by: baddi on July 16, 2012, 03:36:05 AM
Yea, just bought a set (100-120), but I need bigger.

Bigger wtf?! :O

When i bought the set #80-98 i was using #84 with an open cone filter with all other motor parts being standart. I still dont know how you guys get up past 100, without going very rich. Which engine modifications (filter, cylinder & exhaust) have you done and what kind of qlimate do you live in? :D
Title: Re: Main jets... again...
Post by: blue on July 16, 2012, 03:54:36 AM
Bigger wtf?! :O

When i bought the set #80-98 i was using #84 with an open cone filter with all other motor parts being standart. I still dont know how you guys get up past 100, without going very rich. Which engine modifications (filter, cylinder & exhaust) have you done and what kind of qlimate do you live in? :D
thats what I dont get with that  size of jet why even put one in just run with out ............
Title: Re: Main jets... again...
Post by: zombie on July 16, 2012, 04:09:35 AM
Maybe different fuel quality has a part in the jet difference. More Ethanol would need bigger jetting.
Title: Re: Main jets... again...
Post by: blue on July 16, 2012, 04:11:51 AM
Briggs
Title: Re: Main jets... again...
Post by: zombie on July 16, 2012, 04:13:16 AM
pedals...
Title: Re: Main jets... again...
Post by: Kenho21 on July 16, 2012, 04:18:04 AM
All of my mods are below in the tagline are or whatever...

I live in Michigan, I believe 800ft or so above sea level, and it's between 85-100 Fahrenheit this time of year. I don't get it either ut all sings point to, it's still running lean.  :-[



   


                                                                  My Current Setup
                                                                ^^^^^^^^^^^^ (couldn't figure out how to make arrows point down lol)
Title: Re: Main jets... again...
Post by: Kenho21 on July 16, 2012, 04:19:00 AM
And I just run premium 93 octane
Title: Re: Main jets... again...
Post by: baddi on July 16, 2012, 04:53:55 AM
Maybe different fuel quality has a part in the jet difference. More Ethanol would need bigger jetting.

Here, all fuel (perhaps not diesel, dunno) are with either 5 or 10% ethanol, and i cant remember what it is. :)
But it is interesting, where do you guys who uses very large jets live? :D
Title: Re: Main jets... again...
Post by: zombie on July 16, 2012, 04:56:52 AM
I'm at sea level in Florida. We have 10% Eth claimed at the pump.
Title: Re: Main jets... again...
Post by: zombie on July 16, 2012, 04:58:19 AM
80% humidly most of the year, and HOT
Title: Re: Main jets... again...
Post by: baddi on July 16, 2012, 05:01:54 AM
80% humidly most of the year, and HOT

Doesn't really make sense for me, as hot weather and high humidity (is 80% high?) would decrease the need for fuel, as there are less oxygen per liter of air. :p

It must be something with the fuel then, problably. :D
Title: Re: Main jets... again...
Post by: zombie on July 16, 2012, 05:03:43 AM
That is why I posted the temp... You would Think less fuel but It works out different. Must be a fuel thing...
Title: Re: Main jets... again...
Post by: streido on July 16, 2012, 07:36:03 AM
When i bought the set #80-98 i was using #84 with an open cone filter with all other motor parts being standart

Thats just above stock, just above and no more, how the hell did you ever get it to run on an 84 main jet with an open filter? Mustve been lean, i cant see how it couldnt have been lean if stock is 82 and you lobbed in all that extra air? Unless the open filter was tiny and didnt allow air to flow well?

I am in Scotland, 60mts above sea level, mostly mixed weather from sunny to raining, lots of damp days, some humid days some not, never really too hot. My open filter needs a 92 main jet.

Most online shops advise going upsomewhere between 10-15 sizes as a guideline when fitting a open filter.
Title: Re: Main jets... again...
Post by: baddi on July 16, 2012, 12:47:59 PM
Thats just above stock, just above and no more, how the hell did you ever get it to run on an 84 main jet with an open filter? Mustve been lean, i cant see how it couldnt have been lean if stock is 82 and you lobbed in all that extra air? Unless the open filter was tiny and didnt allow air to flow well?

I am in Scotland, 60mts above sea level, mostly mixed weather from sunny to raining, lots of damp days, some humid days some not, never really too hot. My open filter needs a 92 main jet.

Most online shops advise going upsomewhere between 10-15 sizes as a guideline when fitting a open filter.

It was the size and shape of this (http://www.speedline.dk/da/scooter/powerfilter-polini-p203-0061/), but it was an unbranded copy and not the polini filter i'm linking to. :)
I was able to run an 86 jet too, but couldnt feel any power increase, so i used #84 for the whole time i were using it. This were mainly over the summer, and i also tried with the doppler air box (http://www.speedline.dk/da/scooter/powerfilter-doppler-air-box-new-cgn458369/) but it kept falling off, due to lack of space between saddle box and rear tire. Even when it fell off, and i were running without any filter, i were running great and powerful, so for me, jet #84 and #86 were the jet needed for free flowing air. If i went any higher than that, it would be flooding. :p

I also tried a tiny filter like this (http://www.kgi.dk/product-5887-631.php) (possibly a little smaller, i dunno the real size of that stylepro filter), but no matter what jet i had in, i couldn't start the scooter. :)

Title: Re: Main jets... again...
Post by: streido on July 16, 2012, 02:33:45 PM
Yeah that link for the 1st one is like mine only mine has a removable plastic cover to keep the rain out. Im still baffled cos on an 88 jet mine would not go over 15-20mph ??? Was fine on pilot jet but soon as i twisted the throttle to engage the main jet it just died and bogged down. Taped up half the filter and it ran ok so it was def getting too much air for the 88 jet ???

What altitude are you at?

These scoots are confusing at times, no 2 seem to ever run the same way ???
Title: Re: Main jets... again...
Post by: Kenho21 on July 16, 2012, 05:38:10 PM
I'm at 800-850ft (244-260m) elevation
Title: Re: Main jets... again...
Post by: baddi on July 16, 2012, 09:38:06 PM
I'm at 800-850ft (244-260m) elevation

I live in Denmark, flat as a pancake, and surrounded by water. I think its about 20 meters-40 meters but i'm not sure at all!
Title: Re: Main jets... again...
Post by: tuko on July 16, 2012, 11:33:56 PM
I live in Denmark, flat as a pancake, and surrounded by water. I think its about 20 meters-40 meters but i'm not sure at all!


I'm over in Sweden and we are at 28m elevation.


Tuko.