KymcoForum.com
Scooters - 50cc => Agility 50 => Topic started by: 09agility50 on November 10, 2012, 02:10:37 AM
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I was curious of the main jet size(thread size). Also where is a good place to purchase them?
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I got mine from my dealership along with the smooth boss is was 10$ for both. But my A hole dealership made a note on the receipt that is was derestricting the scoot my self
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My scooter came with a bigger jet and smooth boss so i put them in after break in. My last project was the NCY cvt kit. I just recently purchased the 72cc BBK and was wanting to play around with a bigger jet when it gets here.
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Nice did you have big improvements with the cvt kit
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Yes i did like the improvements of the cvt kit, but i didnt use all the parts it came with like the springs in the secondary and the roller weights. I did a lot of testing with all the parts. Hopefully i can use those stiffer springs and different roller weights when the 72cc kit comes.
Any way the CVT kit does show improvements.
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So back to my first question. The only thing i can find is M4x0.70 Threads. Does this sound right to anyone?
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Nope : 4x0.70 is the standard metric coarse thread, which is exactly the type used in most cheap chinese Keihin-immitation carbs for the 139QMB engine... The standard Kymco carb has a thread that's closer to M5 (but isn't)...
You'll need a jet that's specifically made for a Kymco carb.
Only if you can't find one of those, you could try the Dell'orto small type jets, these will "fit with a bit of spit" :P
Be careful though, it's possible to ruin a carb with the tight fit of these jets...
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any idea were to purchase them online? i have only found up to 85 size. Im looking for upper 80's maybe even low to mid 90's.
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What's your setup ?
Did you install a big bore kit or a free flow air filter ?
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I have the BBK and filter on the way. I was wanting to get the jets also that way when i am home over thanksgiving break i can mess with it when i install the BBK. There isnt really any local dealers or parts stores to get the jets is why i was asking about online.
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What kind of BBK did you order ?
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72cc
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You want keihin M5/5mm threaded jets for the stock carbs :)
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i think the last american person thet asked got some from stadiamyamaha.
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For a 72cc I would start with a size 88 jet, you can always go down to 66 if 88 is running rich...
Edit : unless you really want to use the free flow airfilter instead of the stock airbox, that is : with a free flow filter you'll need a way bigger jet, but you're pretty much on your own then, since they're all different... My advice : keep the stock airbox, on a 72cc with stock carb, those open filters are not worth the trouble they cause...
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+1 i have gone back to stock filter. and 82 jet
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I will probably stick with the stock air intake. I have the stock #80 or 82 jet from when the scooter was new. The bigger #85 is in it now. i changed that when i changed the boss after break in. I might take the stock 80 or 82, cant remember off the top of my head, and drill it out to an 88. I have a shop at school i can use to do this.
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if no after market filter or bbk, why have you gone bigger than 82 on main jet. keep it to 82 untill you get the bbk. then try 88.
keep us up dated on the bbk as i have my eye on that narkau 72 kit. keep thinking of going bigger.
i wounder how does the emitions work on a scoot mot. surley a bbk would change the emitions. would you be able to pass a 72cc kit off as a 50?
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Emissions are nothing to worry about in kansas...yet! As long as it says Agility "50" on the title thats all that matters. since from the dealership it came with a smooth boss and 85 jet i put them in after break in. I gained 7-8 mph with smooth boss and jet. It doesn't run rich either thats why i run it.
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I will keep updated on the BBK. I recieved it in the mail yesterday, but unfortunately won't be able to put it on until i get home for break and have the tools to do it there. Hopefully in a week it will be on!
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i wounder how does the emitions work on a scoot mot. surley a bbk would change the emitions. would you be able to pass a 72cc kit off as a 50?
No way they could or would measure the actual displacement from the exhaust accurately enough...
The only thing that counts is your carb setup, it should be running a bit lean for this test, just like the stock 50cc setup does... Luckily the emission requirements aren't as strict for scoots as they are for cars nowadays 8)
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yeah. where im from they dont test at all. even cars and trucks. i think we are one of the few states like this
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Hi all,
Will this fit on Kymco Agility 4t 50cc from 2009 ?
http://www.petrogallimoto.com/shop/en/gy6-engine/1951-m5-naraku-jets-10-kit-from-80-to-98-4250362416834.html (http://www.petrogallimoto.com/shop/en/gy6-engine/1951-m5-naraku-jets-10-kit-from-80-to-98-4250362416834.html)
I am not sure is the main jet had to be m4 or m5. Somewhere it says that on older agility it is m4, but on newer is m5. I don't know if my agility from 2009 is old or new :)
Thanks
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My scoot came with the bigger jet and boss also.But I got me a 20mm carb and put in and a 85 jet.
I just switched the boss with a new a better carb. and a kng plug wire.