86 aero nb 50 performance questions

[86nb50]

howdy,
names bob i recentlly purchased an 86 aero i replaced piston with oem honda jetted carb installed a o7 rutkus variator new 86 aero drive belt and gutted the muffler an installed larger exhaust outlet scooters stop speed is 49 mph i was wondering if anyone could help me on some carb and exhaust mods to help boost hp any helpful advice would be helpful


thank u
bob

[Bear45-70]

Yeah, put at least an 85 main jet in the carb. Even a stock engine runs better that way.

[86nb50]

anyone have a clue oon what kind of expansion pipe to use and what to do for intake reeds and carb?


thank u
bob

[Bear45-70]

CT intake and a 19 to 21 OKO for the intake. Leo Vince for a pipe.

[Wheelman-111]

Greetings:

Wow! Is that 49MPH on stock gears? If so that's like 9-12MPH faster than the average stock Aero. Pretty good.

Bear's advice is correct, but the CT intake isn't quite bolt-on for the '86 crankcase. When you install it, you'll see there's an open strip of case port - nearest the cylinder - that the CT doesn't cover. A thick-metal or composite adapter to do that can be crafted. Use NB50 gasket below, CT gasket above, and make sure everything seals tight.

Your rejetted stock carb can be sold in FS/WTB to recoup some of the $100 cost of the CT manifold and OKO carb. Considering how fast you're already going, I'm not sure the bigger carb will help as much as the LeoVince SP-3 pipe. Look for kit number #4447, and watch for pipe contact with the right frame cover at full bump.

To go much faster, you're probably going to need to convert to SA/16 gearcase and then obtain 9:1 or 8.4:1 gears.

[86nb50]

thanks for the info i ll check the pipe out sounds expensive lol i did change my variator to 07 rutkus and weights i m happy with 49 but my buddies 50 cc 4 stroke china bike got around me i can t let that happen again lol i dont know much on gearing could u please enlightin me?




thanks
bob

[Wheelman-111]

Greetings:


Quoth 86nb50:

...i m happy with 49...

If you're getting a true 49 MPH out of 49cc, you should be popping Champagne.

but my buddies 50 cc 4 stroke china bike got around me i can t let that happen again

Something tells me you're both using very short Miles per hour. GPS, or some other friend's speedometer? They all lie, especially 600cc sportbikes, like by 12%. Fact is, variator or not, stock NB power is not likely enough for 49 MPH, even with gears. A Chinese 50 is even less likely to hit that speed, let alone exceed it.

Gear case swap plans for the NB/SE-05 engine case have been recorded on the Forum, search and read. TrafficJamz is the one who posted about it. If you ax real nice, maybe he takes pity on you. It's not easy to find the parts, and it won't be cheap, but if an old Aero is what you have to work with, it can be done.

Good luck, and get a Garmin on video; You may be doing more like 44. Still, for an Aero that ain't bad.

[turtle13]

Greetings:


Quoth 86nb50:

...i m happy with 49...

If you're getting a true 49 MPH out of 49cc, you should be popping Champagne.

but my buddies 50 cc 4 stroke china bike got around me i can t let that happen again

I agree with mr wheelman, i pushed my aero 50 to 50 plus and its no easy task. I ported the bore, keli vari with sef plate, malossi wild lion pipe, 10:1 gears and wind at my back for a really long stretch of WOT that is on a slight downhill to make it happen. I about did a jig when i saw the GPS. Best way to get there without the engine over reving is truly with a bbk and gears. I wanted to push it in stock form as far as possible, and let me tell you, even with gears the motor feels like it is going to explode when you get to that point...

[86nb50]

howdy,
me and another guy both have 86 aeros we both modified are aeros with 07 rutkus variator,(had to dremel case ti fit) jetted carbs opened up mufflers a bit and run nothing but 110 we both can hold 49 on down hill grade and and high 40s on flat ground and up hills depending on what kind of run i get b 4 i get to hill i live in st. l mo we have hills. also both mopeds have great acceration.from a dead stop to 20 i keep up with 125 4 stroke. i cant b lieve how fast they go both me and my buddy couldnt b happier they haul * we have checked speed with gps and have been paced with friends trucks and cars with factory sized wheels so b lieve me gentlemen ...... in stl 2 50 aeros do 49 with a lil red kneckin

[Bear45-70]

howdy,
me and another guy both have 86 aeros we both modified are aeros with 07 rutkus variator,(had to dremel case ti fit) jetted carbs opened up mufflers a bit and run nothing but 110 we both can hold 49 on down hill grade and and high 40s on flat ground and up hills depending on what kind of run i get b 4 i get to hill i live in st. l mo we have hills. also both mopeds have great acceration.from a dead stop to 20 i keep up with 125 4 stroke. i cant b lieve how fast they go both me and my buddy couldnt b happier they haul * we have checked speed with gps and have been paced with friends trucks and cars with factory sized wheels so b lieve me gentlemen ...... in stl 2 50 aeros do 49 with a lil red kneckin

Unless you boost the compression the 110 gas is a waste of time. Oh and you midwesterners have no clue about hills.

[86nb50]

i guess u havent been to st l we are in the ozarks it is hilly so i know what a hill is and about 110 its not really for performance its better on the piston temp cause i run the s*** out of it oh and that sweet exhaust always smells good

[Bear45-70]

i guess u havent been to st l we are in the ozarks it is hilly so i know what a hill is and about 110 its not really for performance its better on the piston temp cause i run the s*** out of it oh and that sweet exhaust always smells good

I live 94 feet above sea level and this hill is a no name bump and is over 1000 feet high.