HELP!! nb50 and nh80 carb swap

mmeadows · Post by **mmeadows** » Tue May 14, 2013 2:36 pm

i know the bear could answer this queation licklity splickity but .........

i am swapping a aero 80 carb and intake on my scooter, however it is unclear what goes where as far as connecting hoses.

any ideas?

patthesoundguy · Post by **patthesoundguy** » Tue May 14, 2013 8:54 pm

I would check out the aero 80 manual it should give the hose locations. I had my carb off my 80 a month ago and I can't remember what went where. A couple of those hoses are for the bystarter. Which you can use a simple valve to make a manual setup.
This diagram should help

http://www.cheapcycleparts.com/model_ye ... carburetor

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patthesoundguy · Post by **patthesoundguy** » Tue May 14, 2013 8:57 pm

Oh you will need to zip off the tab next to the silver idle air screw to be able to properly adjust it.

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mmeadows · Post by **mmeadows** » Tue Jun 04, 2013 1:10 am

So i went ahead and bought the vacuum thing that is missing from the original aero80. my remaining 3 plugs and the carb go into that so it should be plug and play

now for the last piece of the puzzle .....

What uni filter should i get that will fit the aero 80 carb

and!!!!!

most importantly, What jets will i need for the main and pilot with a uni filter?

just a quick recap for jetting purposes i have ported my block and my stock 50cc cylinder. i have a leo vince pipe and want to run the nh80 carb/intakes/reeds with a uni

mmeadows · Post by **mmeadows** » Sat Jun 08, 2013 2:24 am

ill take pictures tomorrow but right now i cant get the carb. to pull gas from the fuel tank. Any ideas why?

all lines are hooked up like a stock nh80 im pretty sure.

is there any chance the 49cc in not enough for the bigger carb and intake to create a vacuum for the petcock?

mmeadows · Post by **mmeadows** » Thu Jun 13, 2013 6:37 pm

so i lost my phone and wont have pictures for a while, probably a few days. But! i dont think pics would help me here very much,

mmeadows wrote:
all lines are hooked up like a stock nh80 im pretty sure.

don't trust an mmeadows "pretty sure" lol, i was way off. line are now hooked up correctly and stock. nh80 vacuum and bi starter parts,

i also have the throttle cable disconnected from the handle bars so i can use it while sitting down next to the carb.

my oil pump is fully open all the time.

attempt number 1
no air box, stock jets. It would start if i gave it alot of throttle but would run very rough. and low rpms. ( needless to say i almost pooped my pants with excitement hearing it run for the first time in a year with its new nh80 carb, reeds porting and leo pipe)

short intermittence
realizing i was running scary lean i decided to take a break until i could get more parts. but then, as i was working on my other scooters, i thought about how my aero80 main jets looked familiar, and remembered a set of dio jets i was sent by mistake, and wouldn't ya know.... they fit the aero80 carb

and then to make it even sweeter, i heard a knock at the door and it was my uni filter, seriously 10 min after attempt 1)

Attempt number 2
Uni Filter, number 95 main jet, stock small jet/ idle jet. started right up but then idle kept revving up ( to high for my liking with new rings) so i killed the engine. And yes i had the throttle assembly in correct.

Attempt 3
Took the slide out to make sure everything was put back properly, and now she wont start

I'm going to re read the nh80 manual's carb section. anything i should look at especially close?

in regards to jets. any recommendations on the nh80 slow jets? only one is still offered from Honda (the aero125 40 jet) and its 17.99 + waiting.

I WANT TO RIDE!!!!

mmeadows · Post by **mmeadows** » Thu Jun 13, 2013 10:38 pm

So the air screw is a factory preset and cant be adjusted. my plug is very wet. could this have anything to do with my 95 jet or uni filter?

ringLord4 · Post by **ringLord4** » Fri Jun 14, 2013 2:58 am

mmeadows wrote:So i went ahead and bought the vacuum thing that is missing from the original aero80. my remaining 3 plugs and the carb go into that so it should be plug and play

now for the last piece of the puzzle .....

What uni filter should i get that will fit the aero 80 carb

and!!!!!

most importantly, What jets will i need for the main and pilot with a uni filter?

just a quick recap for jetting purposes i have ported my block and my stock 50cc cylinder. i have a leo vince pipe and want to run the nh80 carb/intakes/reeds with a uni

I would go with an 85 jet and buy Uni 1" air filter hole plugs. They work great. You simply drill out 1" holes with a wood bit (slowly) and pop those little 1" plugs in their that have air filters on them. 3-4 should do. Works great, I have it on my 84 Spree.

Here's a link. Hope it helps!
http://item.mobileweb.ebay.com/viewitem ... 0459142024

ringLord4 · Post by **ringLord4** » Fri Jun 14, 2013 3:09 am

Not the filter... Could be jet

mmeadows · Post by **mmeadows** » Thu Jun 20, 2013 4:36 pm

so i cant find it now but i remember a chart that explained during certain parts of throttle, only certain carb parts are in play.

the air filter and main jet dont really matter until 1/2 throttle onward.

isnt starting and the first 1/4 throttle only concerned with the throttle screw and air screw?

where does float level come into play?

i feel like im running out of options

mousewheels · Post by **mousewheels** » Thu Jun 20, 2013 6:18 pm

so i cant find it now but i remember a chart that explained during certain parts of throttle, only certain carb parts are in play.

wiki link

where does float level come into play?

Get that set before tuning starts.

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