How to do carb tuning

[missionadi000]

could some 1 pls explain this a little simpler...

 

there are two screws on my 223cc bike.

 

1 alters the rpm idleing

another i guess is for the fuel mixture on the opp side.

 

what is which???

 

my bike redlines at 9000rpm.

 

how 2 tune it for low ,mid and high.

[stsoh]

u already know the idle screw, so set the idle speed after different settings.

do each one adjustment at a time.

low - adjust pilot screw or air mix screw by a quarter turn each time either tightening or loosening, try which side gives a better startup.

mid - jet-needle's eclip in slots at the top end of jet-needle. top end slot is lean n bottom end slot is rich. try lower down one slot each time to feel the effects.

high - main-jet, remove main-jet n check the number imprinted on it's side. otherwise it is stated in service manual. size r in #2 increments like #98,#100,#102,#105,#108,...,#120,#122,...,#144,#146,#148,etc. try one size bigger then the next bigger size, number is reference to orific (hole) size.

after all the settings, do remember to check spark plug colouration whether your setting r too rich or not. black soot r too rich. brown-grey-tan-tip with black on the outer rim of plug (no soot) = good.

[pendekEverlast]

hey guys i need help..

i just wash m carb today..

my idle was about 1.2

wen i engage first gear.. it doesnt sound gd.

then wen i engage to top gear.. i can even 'whack' like i use to do.

any help?

 

thks.

[summi]

Hello, im Brian. Im intersted in how to set my carb to the optimum. But since im still a nook, there are alot of terms, i still dun get it. I wonder if we could discuss over coffee next time wif our bikes? I look forward to know u as a fren. Hope to hear frm u soon. thanks.

[josh87]

whats wrong if the rpm dont rise after 9k at gear 5? for my 2 stroker..

 

low gears no problem. is it a main jet issue or a rear sprocket issue?

[Simmz]

Hi guys..

1stly i would like to apologise for the bad explanation..

Anyway need some help from you guys here.. I'm riding a Kawasaki ZX4, Just now while riding along the express i discover that my bike has lost power. Closing of throttle and reopening of throttle seem to be a problem to me.. Bike has poor acceleration compared to it's normal state. It's like there's something obstructing the fuel to flow out from the carb to the pipe.. The worst of it is the acceleration.. While moving off from the 1st gear i discover there's something "blocking" the fuel system at about 5K in the rpm.. The "blocking" problem will then be gone if i continue dragging toward 6-7K in the rpm.. I must say the bike has totally lost it's setting and i had my carb service about 2-3mths back.. Just wondering whether is it the tuning problem as i have been going back to the workshop constantly just to get my bike tuned properly.. Another thing is that i suspect water has gone into the carb due to the recent rainy weather..

 

Guys need your enlightment.. Please advise.. Thanks alot

Edited March 8, 2009 by Simmz

[Guest sqlcdzx]

Now that is a lot of brass air fittings http://www.liangdianup.com/subpages/airfitting_1.htm there is just about every type

of air fitting that you could want. Wholesale prices too. I guess these could be used as small water pipe fitting also. I

used some of the parts to make my babington wvo burner.

[kongquan163]

Thanks for this site very helpful.

[Iori Yamagi]

Hi anyone can help?There is a piece of wire hose connect from Engine to the carb...But the thing is,that piece of wire come out..i couldnt find any hole to fix it back to the carb..does anyone know?thks

[mbike508]

Hi anyone can help?There is a piece of wire hose connect from Engine to the carb...But the thing is,that piece of wire come out..i couldnt find any hole to fix it back to the carb..does anyone know?thks

 

sound like is the carb overflow pipe. Ought to be connected to somewhere within the carb.

[kwanheng]

sound like is the carb overflow pipe. Ought to be connected to somewhere within the carb.

 

engine to carb?? 2T pipe? overflow is from carb to no where else de.

[Iori Yamagi]

ya i ask my frd check his sp..funny is his one is only nut..no wire hose connecting to it O.o and he say that nut is use for when changing Engine oil...hmm..weird..

[mbike508]

ya i ask my frd check his sp..funny is his one is only nut..no wire hose connecting to it O.o and he say that nut is use for when changing Engine oil...hmm..weird..

 

ok, I think the pipe is about 1/2" dia. May be can show the picture or some expert can explain what is that pipe for?

[mbike508]

For small bike, the idle rpm from engine cold start to fully warm up is about 500rpm different, is it normal or can be further tune down?

[raven77]

like to know the direction for tuning the Air fuel screw at the carb rich turn clkwise & lean turn anti-clkwise. for a wave s .is it correct?

[choke]

Very awesome and informative guide.

[erickho]

.................

[Kingsp]

(1)Hi bros, i have 2 noob questions to ask as i am a newbie to my bike. Wats the benefit for carb tuning? I mean i am riding a Honda SP so lets say i tune my carb, Wat benefit i will get? And is it good to tune carb? And during inspection can pass?

 

(2) Wat is stomach cut? Can anywan explain it to me pls. I heard Honda SP sound all diff. Some are loud and high pitch while some are normal sound. I think my SP sounds normal. But i wana make my SP sound like those high pitch if u guys know wat i mean like pain in the ears. Looks cool. Hahaha. Do u guys recommend me doing that? if i do, can i pass my inspection? And does it damage my bike? thanks.

Edited June 10, 2010 by Kingsp

[Iori Yamagi]

(1)Hi bros, i have 2 noob questions to ask as i am a newbie to my bike. Wats the benefit for carb tuning? I mean i am riding a Honda SP so lets say i tune my carb, Wat benefit i will get? And is it good to tune carb? And during inspection can pass?

 

(2) Wat is stomach cut? Can anywan explain it to me pls. I heard Honda SP sound all diff. Some are loud and high pitch while some are normal sound. I think my SP sounds normal. But i wana make my SP sound like those high pitch if u guys know wat i mean like pain in the ears. Looks cool. Hahaha. Do u guys recommend me doing that? if i do, can i pass my inspection? And does it damage my bike? thanks.

Bro frankly speaking..at first i oso dun know what is it..i read alot from thread and i went alot shop asking to tune my curb..nobody doing it rite..until now was done by my mech ..benefit is FC will improve very much..ride will be must smooth..Inspection sure pass.. nothing had modified..

 

2nd-- not much explanation but confirm cannot pass..

[Kingsp]

Bro frankly speaking..at first i oso dun know what is it..i read alot from thread and i went alot shop asking to tune my curb..nobody doing it rite..until now was done by my mech ..benefit is FC will improve very much..ride will be must smooth..Inspection sure pass.. nothing had modified..

 

2nd-- not much explanation but confirm cannot pass..

 

Bro FC is wat? sorry as i say i am abit noob. lol. Ouh that measn after i tune my carb my ride will be smooth? Ermm does the sound changes? wat else? inspection pass? wahh power. So bro means i just go to the shop and tell them i wana tune my carb rite? How much u think will it cost?

[Iori Yamagi]

Bro FC is wat? sorry as i say i am abit noob. lol. Ouh that measn after i tune my carb my ride will be smooth? Ermm does the sound changes? wat else? inspection pass? wahh power. So bro means i just go to the shop and tell them i wana tune my carb rite? How much u think will it cost?

 

FC= Fuel consumption

[Admire]

Cut stomach , cut end can more power

[Kingsp]

Ouh. ok thanks bro.

[Pandoras Kitten 3]

Reading up on piston-engine aircraft fuel mixture management is an easy way to learn about the how and why of carb tuning :3

 

Once you got the basics of what is lean, rich, and their effects on engine performance, it's time to turn a few screws and reap the benefits.

[emarc77]

nice info..