vespa IDLE JET setting: 2lean & HEALTHY SOUNDcheck | SI CARB rotary valve
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- čas přidán 17. 05. 2017
- u can actually hear it when the idle jet setting (and/or the mixture screw) is too lean, get a feeling whats too lean and whats healthy. too lean means dangerous, cause the engine will definitely die if u go outside the city and trash it :D :P
new REED valve si carb version:
• vespa IDLE JET setting...
setting the carb like this is a good basis for a testride where u can fein adjust the setup, no worries nothing will happen.
on-road behaviour of a well set ide jet engine
• vespa ON-ROAD BEHAVIOU...
• vespa ON-ROAD BEHAVIOU...
• Vespa/LML si carb ON-R...
how2start:
1) healthy engine
(no oil sucker, no false air, no blowback) ((see vid guides to each issue))
2) proper fuel support
3) meqsured main.jets (guide!)
3) warm engine
wondering why air filter is missing and what will change if u add it and the air bellow (see small guide btw how2 mount it)?!?
u are on the safe side! the naked carb runs leaner as it gets more air, so if u start setting it up without, the setup will get richer when u add filter/lid/bellow.
no, its absolutely no problem.to drive without airfilter/lid/bellow. no worries
tried also taking videos while driving
but enginw sound is too quiet and Vibrations to high (video pic gets wobbly)
NOTE: the idle jet is the reason for most engine killing and NOT the main jet. actually the engine cools down at full throttle, it gets really hot while cruising at the 0-50% throttle range. and an engine with power is mostly moved around 25% only original engines with no power need full throttle to get moving.
hope this prevent a lot of unneeded seizing!
drive safe mates :D
cheers
#SIcarb #carbsetting #dellorto #idlejet #mainjet
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DISCLAIMER: the information shown in this video, is about THIS specific hardware. it is my personal observation documented with this video. It DOESNT automatically mean, that all such parts by this producer or seller do have or will have same issues.
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Been looking around for carb explanation ... even the video in my own language but couldnt find the a thorough explanation until i find your vid... thanks much for sharing ...
Ur welcome! i am. Even preparing another this time complete si setting guide also refering to basiscs like healthy engine needed!
This video saved me such a headache on the road today!
hi michael, very happy to hear that, cheers! :D
This is your best video! Many thanks for it!!!
+kwestak 😁😁😁👍 thx! U are welcome 😀 hope it prevents a lot of engines from seizing 😎
just rebuilt complete engine with new crank - cylinder head - sip 12volt ignition from 6v - exhaust, so new carb settings are needed as you know - been given full set of jets atomiser, idle jets to complete my build. --- this is where you come in with this extremely helpfful video.. All i can do is subscibe and like as i have done. Thanks a lot, and i wish you safe travels
🍻👍😎
I'm getting black smoke from my exhaust but only after a long run then a stop, if I have a long run then a slow town ride its no longer black, any ideas? I'm thinking to rich low down then when I have a long run it starts to burn off the unused fuel
Awesome. My Vespa runs great now! Thank you 👍🏼
+Måns Nilsson hy mans, i am very happy to hear that :D exactly thats the reason why i share all of these infos :) where are u from? Sounds north
dude very nice you help me so good!
+ori agnes happy2 hear that! :)
BRILLIANT..appreciated
Cheers 🍻
Thanks!
Excellent video as always....however, I just put my carb back on following a strip and clean including adding a fast flow fuel tap and now it just won't tick over, it runs a little better with the choke out but off choke if I don't keep the revs up it just bogs and dies. Any ideas would be extremely grateful.
dirty carb
Excellent Vid & explanation. I have a Stock GS160 with the 27/23 carb and the issue i cant get to the bottom is that it ticks over fine but as soon as you rev it or pull away it dies but it can be revved passed that flat spot. It has the stock slide and correct pilot jet. makes pulling away a pain as you apply the throttle it feels like its going to cut out but you have to rev past it. any help appreciated
thx! 😄
carb cleaning of course, can be dirt, dont forget to also blow the jets and use a needle to clean the holes
if this doesnt work, search for false air, checkout my guide
but typically it slows down coming of the rev after closing slide, "revs are hanging"
What is Info please ?
How do I put together a jet "stack" for a 2006 PX150 with a Sito+ exhaust. Stock jetting was too lean to begin with.
main jet 2sizes bigger
My Vespa reacts to the screw being turned but once it's idling smoothly at what point should I stop turning the screw outwards (richer?) Always like to be slightly richer as I don't want a seize. I just have a standard setup. Standard (non cat) exhaust, 45/140 idle, 140/BE5/99 on main stack. Cheers
My revs increase when I screw in the mixture screw (enginge doesn't die). When I screw the mixture screw out revs decrease again. What should I set the screw to? 1 turn further out from where it reaches low revs?
+StoneCut if the engine reacts to the svrew u are on the right path. How to set it, the video tells u. No increased idle after full throttle and no.wopwopwop if u close the slide after full throttle
How many laps should I loosen the bolt to have a good autonomy without problems?? i have a px 200e BRAZIL
2 turns if everything is ok, this means the engine healthy
Can you give me advice to may LML. The Idle was to low and i clean the carb.so what would be the problem. Im from the philippines.
Need more details. U can contact me over my Facebook page.
This can be applicable to a dell'orto si 20-20D?
of course!
Is this process any different on the reed valve LML/Stella 150 engine?
No, there is even the same video with reed online
Still confused with richer n leaner. Are those words for the air? Turn air screw clockwise = leaner?
for the mixture. IN leaner (rev goes up) OUT the mixture gets richer (rev goes down)
Sir how can I reduced the exhaust smoke.... It is emitting high amount of smoke. Please help me.
Where should the idle screw be when you are doing this with the mixer screw?
At normal rev, so that the engine runs smooth, i guess 1400rpm?
Question here mr moped, so if you turn it to the right less fuel goes into the engine, and if you turn left loosen it more fuel go into the engie ?
fuel air mixture. not just fuel. yes.
thanks for the video sir.do you have any video preference on how to get the correct setting for plug condition? is it reflect with idle jet setting as well?
u mean pnp tuning? usually original 2,9 ij, just turned richer (out!)
@@FreakMoPed8... 2.9 ij can be used on si 2424?
of course, its the standard ij. its the 160/55
@@FreakMoPed8... Thanks for the info. By the way, do u mind if I need some advice regarding my carb. Using spaco si 2424, idle jet 160/55, Main 160-be3-116.
The plug full with carbon, it is not normal. What wrong with the setup? Need to change the main jet, or just adjust the mixer screw.
Thanks.
@@shamsulfuadahmad700 so many factors.. those are 1) the mixture is too rich (too much loosening the idle jet screw), 2) bad ignition/contact breaker timing, 3) too much oil mixture in the fuel, 4) wrong spark plug [there are 2 types of spark plug, 1 for daily drive, and another for long trip, see about Hot and Cold Spark Plug explanations from NGK], 5) the main jet or idle jet size does not match the carburetor, the best way is to stick with standard carburetor, see scooterlounge.com/vespa/reference-library/vespa-stock-jetting-reference-guide.shtml
My PX150 with Pinasco 190 kit was dosplaying these symptoms. The revs would take a while to come down after revving. I switched to a leaner idle jet and left the mixture valve the same. The richer jet made the issue worse. How is this even possible. I am very confused.
wrong direction, u need to make ij RICHER. and dont change the jet, play with the mixture screw.
if it doesnt act normally, your engine is not healthy ie false air, checkout my guide
@@FreakMoPed8 Sorry. I switched to a richer jet not leaner. The richer jet made it worse.
when i close the mixture screw my engine doesnt want to die..i need the bigger or smaller idle jet size?
+MUHAMMAD ZAIDI setup and jets?
yes
wanted to know ur setup and jets ;) could also be another part of the si carb jets as everyting is connected. ie: if the idle jet gets VERY rich for instance 1.8 and it still pings, its time to enrichen the
air corrector
my carb is popping when high rpm especially when going uphill, whats problem? and when i set it richer, the revs became higher not lower
Whats popping
@@FreakMoPed8 carburetor. people often call it backfire, but i think that just unburn fuel mixture
How many turns the mixture and idle jet in a Px125.I try to do a good settings but still have a lroblem with ride, and with start in the morning and also when it is warm. Is it necessary to turn off the fuell cock always when i stop my Vespa?
2
no
Thank's my friend!
1. Start with 2,5 turns to full clockwise
Changed my p150x engine block back to standard 57.8 piston about a month ago and now the spark plug dies very quickly (2-3 days). I use 150 BE5 85 main jet and 48 pilot jet.
1. How many times should i turn the idle jet
2. Is the main jet too rich??
use the guide.- sorry, cant help u with si20 and its jetting, i only use si24
La configurazione per il 20/20 è 48/160 per il getto del minimo e 160/be3/102 per il getto del massimo. Valvola n. 1.
La vite di miscelazione va regolata a circa 2 giri dal tutto avvitato, e poi regolare in fine a motore caldo, con il minimo un po' alto, sui 1500 giri. Una volta regolata in fine la vite di miscelazione, riporti la vite del minimo alla regolazione che preferisci
I changed points and condensor and retubed my quattrini 172. With 50/140ij and 128mj i have flat spot at anove idle. First have to ride and wait untill revs go up to then she goes. 😢 so i decided to ride with out side cover and tune it on road. Normally carb sits at one and half turns. Desperate tryingvtovget rid of flat spot. Starting at 2.5 turns i worked my way down. Its bogging and flats spots all over. Then i got over it and turned carb in all the way. Ridding it then half turn... at .8 turn scooter settled but i revs bit high. Scoot revs clean. At 1 turn out scoot has no flat spots no bogging. 😮 revs bit high. So i set idle down. Scoot from idle jet to main jet no flat spots. Is this where i should leave it? At 1.5turns scoot has like flat spot until main jet kicks in and revs. Less 1.5 turns scoot boggs. I mean carb starts feeding petrol at .5turns to 4turns. I know my stator not healthy. 😢.
So as you look at the black cover for wire. When carb set correctly. The plastic will not vibrate so much. I don't know if you have noticed this before. But I put my hand on side of flywheel. When my finger stop vibrating carb set healthy. If it's lean or rich vibrations different. Lean brrrrrr and rich more vrrroof vrrroof. If carb rich or lean scoot will vibrate more on handle bars. When set correctly scoot will be butter smooth. This part I don't understand. I got bogging and flats spots out. But I have vibrations in handle bar 😢😮
I give up
My screw is only out 1 turn, any more and I foul my plugs almost instantly. Does that mean my Main Jet is too rich? I get 4 stroking at low throttle as well..
is the engine healthy? Ignition ok, no gearbox oil sucker
@@FreakMoPed8 engine just got rebuilt and finished running in about 1000km. Running a 50:1 oil ratio. Any more than 1.25 turns and I burn through plugs.
fact is that it kills plugs = somethings i wrong. start with checking the ignition. u got a timing light? check if its stable and doesnt jump. then try new/different cdi and stator
check my ignition video guides
@@FreakMoPed8 damn, I don't have a strobe. I was thinking of upgrading to 12v at some stage and maybe that might help. You could be right about ignition. Scooter runs and idles perfect, starts first kick, but rear bulbs keep blowing and plug seems to be pretty black with carbon build up at 1 turn out. Was thinking it could be main jet as I saw your video on 4 stroking at low throttle. After 1/8 throttle she goes like anything and power is consistent throughout.
I did not quite understand your approach:
The IDLE JET Screw function is not just opening a minimum gas to maintain a higher or lower idle? It's the same as having the gas fist a little turned, isn't it? So what does it have to do with more or less rich in gasoline / air
Not my approach, uts how the si works. Main jet stock delivers fuel to the idle jet, there its mixed with air, then this gas flows over the mixture screw under the slide (thats why its called mixture) which is th most Important jet if you close the slide.
1/3 slide the main jet stoxk takes over. czcams.com/video/KE33cozzoYc/video.html
Here u see Where the idle jet get s fuel and where the channel leads to the screw
czcams.com/video/06m3450pTps/video.html
@@FreakMoPed8 OK! Thank you for explanation, for your time and congrats for your videos.
thx, u are very welcome :)
i can't distinguish the wop wop. at which timing does the wop wop comes in? :) tnx
me too
after very high/max rev... try to pull the throttle until it reach max rev, release it, and listen immediately
What is the meaning of rev ?
Revolution speed, engine speed
Thanks
How to size your karburator? 24:24 or 26:26??
It does not matter, 24,25,26,28mm the all perform the same on a limited rotary valve engine 😉
Schade das es die Videos nicht mit deutscher anleitung gibt ;) sonst Super gemacht ! Grüsse aus der Schweiz
Weisst eh, d gibts nur in 3länder, e funzt überall, weltweit bedarf an infos 😉
schweiz! direkt an der grenze bin ich aufgewachsen ;)
I put some fuel additive in mixture and now blowing white smoke...... Good or bad?
👍🇮🇩
Thanks!!!!!