Maximize Your Scooter's Potential: Main Jet Change Tutorial

Рет қаралды 4,307

11 ай бұрын

Welcome to Scooter Street! In this informative video, Brad will guide you through the process of changing the main jet on your 50cc two-stroke scooter. Whether you have an Aprilia, Piaggio Vespa, Gilera, or any other brand, the steps are essentially the same. Changing the main jet is crucial when installing a 70cc cylinder kit or performance exhaust to prevent engine damage. Brad will demonstrate how to remove the carburetor, access the main jet, and replace it with the appropriate size. He also shares some handy tips and precautions along the way.
Engage with our community by leaving your questions, comments, and suggestions in the comment section below. We value your feedback and are here to support you on your scooter tuning journey. If you're interested in purchasing any of the products featured in this video, including jet kits, be sure to visit www.scooterstreet.com.au for a wide range of products and support.
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CHAPTERS:
00:02 - Introduction and scooter model overview
00:32 - Removing the airbox and carburetor
02:30 - Changing the main jet
03:37 - Removing the float and bowl
04:29 - Adjusting the float and bowl
06:01 - Reassembling the carburetor
07:26 - Reinstalling the carburetor and airbox
08:11 - Final steps and conclusion

Пікірлер: 53

@c.sawy3r 10 ай бұрын

first vid in a while i love it

@scooterstreetau 10 ай бұрын

Sorry we took so long, Life gets in the way. Glad to see you back🙋

@Nelson-xd9yp 6 ай бұрын

wich jet should i use on a stock gilera typhoon to make it a little bit faster? Do i have to upgrade anything else like rollers ou something?

@scooterstreetau 6 ай бұрын

You need to add go fast parts to go faster. Such as exhaust or transmission.

@Adam-ot3oy 7 ай бұрын

Hi, I have a MBK Booster 100 with malossi variator, malossi sponge inside the original airbox and the carburator it's the original mikuni 19 with 75 main jet, I need to change it?

@scooterstreetau 7 ай бұрын

Increase the jet so the engine splutters when throttled and then lower the jet as required, to clean the carburettion.

@Hydanci 29 күн бұрын

Hello, i have an SR50R with an Extra Giannelli V2 exhaust, if I change my exhaust to for example Yasuni R, will I need to change the jetting?

@scooterstreetau 28 күн бұрын

The general rule is yes, you must tune the fuel system and the transmission for each change or addition to the engine.

@user-yw8fn8es1f Ай бұрын

I have a 2020 aprilia sr50 mods: yasuni z, malossi 4.7 rollers, do i need a 60 or 62 jet or am i fine with the stock jet, and if i put 62 jet do i need to mod my airbox or maybe get a malossi sponge

@scooterstreetau Ай бұрын

Try the 62 and adjust it required.

@svenosojnik6651 10 ай бұрын

hello, i have a gilera stalker.. with what jet should i start with the sport malossi 70cc, 17,5 dellorto and yasuni r, a lot of friends told me to start with 100..

@scooterstreetau 10 ай бұрын

Yes the 100 is ok, I would start with the 94. If you have a POD filter start with 120.

@ants4193 4 ай бұрын

what could the problem be if the engine sputters at wide open and at low rpms but works perfectly at 3/4 throttle. just installed a new carb so i know it needs some adjusting but what should i adjust or change

@scooterstreetau 4 ай бұрын

Start with the jet, as a trick crack the air box cover and have a slight opening to allow more air in. Give it a rev and see if it clears this issue and then you know it is rich, jet down 1. Or you can be over capacity of the cylinder.

@hibbardfilms 4 ай бұрын

I have Zip 50cc 2t - with a gianelli exhaust and with the idle screw all the way in I still can't get the idle speed high enough.... should I go up one pilot jet to gain a better range of idle speed?

@scooterstreetau 4 ай бұрын

This can be very difficult to diagnose! Try everything.

@rinorzmajlaj Ай бұрын

Hi I also have a SR50R. Stock 17.5 Dellorto ID Carb. What I changed on thr Carb is: A7 Needle (clip at second lowest), Mainjet 68 and Secondaryjet 36. - Stock Airbox with removed snorkel - Malossi Airfilter sponge - open Exhaust Manifold with stock exhaust. My Problem is, that when I ride it feels like it's to rich. But the sparkplug is nice brown. And also when i am full throttle - let of for 1~2 seconds and go back full throttel it doesn't respond for a split second. Like it doesn't have patrol. It doesn't make sense.... Do you have a good tip? 😅

@scooterstreetau Ай бұрын

It sounds rich!

@Octavian17 9 ай бұрын

What rollers and spring would you recommend on a sr50r with yasuni r and malossi variator

@scooterstreetau 9 ай бұрын

Yellow Polini Clutch spring set, 7.2 gram rollers. 56 main jet.

@Octavian17 9 ай бұрын

7,2 g rollers? isn't that too much for 50cc?@@scooterstreetau

@Prasowkasportowaa 10 ай бұрын

Hello Sir, do you have the stock foam on the stock filtr?

@scooterstreetau 10 ай бұрын

Yes we do. scooterstreet.com.au

@Prasowkasportowaa 10 ай бұрын

I mean on the video, you are using the 95 jet whit stock airbox and stock filter?

@scooterstreetau 10 ай бұрын

@@Prasowkasportowaa This scooter is not the standard condition it has many upgrades. The concept for the video is how to change the main jet and that alone.

@hoecakeee1 10 ай бұрын

hi, i got a derbi atlantis 2011, im getting a leovince handmade tt and derestricting it. i was wondering what main jet size i should start with? stock airbox with malossi air filter inside

@scooterstreetau 10 ай бұрын

What a great design scooter! It is like a big brother to the ZIP. I ike it. I would start with the 66 jet, make sure the scooter is riding perfect before you touch it with any tools..then get the mods started.

@hoecakeee1 10 ай бұрын

@@scooterstreetau yes it is quite a nice scooter. it is running perfect now, fixed a bogging issue that had to do with an air leak. well thanks man! 66 jet it is.

@scooterstreetau 10 ай бұрын

You should trail different rllers and also fit a clutch or tighter springa at the least, all the best.@@hoecakeee1

@hoecakeee1 10 ай бұрын

@@scooterstreetau yeah im ordering some 5.7, 5.5 and 5.3g rollers. will see if i need lighter/heavier. clutch is gonna have to wait a bit til i get more money. cheers!

@scooterstreetau 10 ай бұрын

The clutch springs will have the greatest effect on the accleration and building RPM.@@hoecakeee1

@aiiiiiiiiiiiiiiiiii 18 күн бұрын

Hey, I have a SRMT50cc ant the mods are : Leo vince TT exhaust, 4.8 g rollers, red springs and a malossi air filter. What size jet should I use?

@scooterstreetau 17 күн бұрын

Change the jet once the engine is warm, increase jet so the carburetion is spluttery then jet down until it cleans up when throttling.

@aiiiiiiiiiiiiiiiiii 17 күн бұрын

@@scooterstreetau yeah but what size jet should I use?

@aiiiiiiiiiiiiiiiiii 17 күн бұрын

@@scooterstreetau change the jet to what size?

@scooterstreetau 16 күн бұрын

@@aiiiiiiiiiiiiiiiiii what is the current size?

@scooterstreetau 16 күн бұрын

@@aiiiiiiiiiiiiiiiiii what size is in now?

@DinoDL756 3 ай бұрын

Hi, I bought a used yamaha neos mbk ovetto 50cc with a top speed of 70 kmh i put a gianelli extra ehxaust and malossi variator with 7.0 g rollers and the top speed didnt change at all, and it also starts at a very low rpm and when i reach 10-20 then it really starts to pull maybe changing the clutch springs will fix that? And as for the jett i dont really know what i got what do u recommend i put?

@scooterstreetau 3 ай бұрын

I can't really comment as I have no history of issues or tuning, but I can say I agree with you, these upgrades should increase the power and speed.

@DinoDL756 3 ай бұрын

@@scooterstreetau hmm maybe thats the max speed a stock 50cc cylinder can get? But still love your videos bro im learning alot!

@scooterstreetau 3 ай бұрын

you would seek at least 75kph, check the exhaust for restrictions.@@DinoDL756