Carburetor issue...

[ikan_glamour]

Hi guys, need a little help frm the pros..

When buying a carb frm someone(fellow forumer),

wat are the important things that need to check before buying the carb?

 

And,

 

When diy servicing carb, which of the part tat are most important things tat need to be clean or change? Wat oil or ?? shld i use to clean it to prevent frm rust?

 

 

Need some advice here

[ocel]

btw wat kind of carb u re buying? for class 2?

[ikan_glamour]

Mostly for class2B..

-Keihin

-Mikuni

& etc ....

[S750WP]

Check the jets to see if its worn i.e needle jet hole should be circular and not oblique, jets needle should not be worn. Check the float and it should not be puncture and the needle valve is not worn. Diaphragm should not be tear or broken. The butterfly valve should be able to open and close smoothly.

 

For cleaning just buy a spray can of carb cleaner and spray through all the holes, take note to remove the o ring and plastic parts first. Add a in line fuel filter to your fuel hose and your carb will be clean for a very long time.

[crazydj]

Let's say i buy a new stock carb from parts shops. I just fit it in myself? No need to set anything? Plug and play?

[ikan_glamour]

U need to tune-in 1st bro.. Jetting are important as it control the fc and air-intake. With the rite jetting & tuning, u get to save fc a'lil and power !

~jz my 2cents..

[ikan_glamour]

U need to tune-in 1st bro.. Jetting are important as it control the fc and air-intake. With the rite jetting & tuning, u get to save fc a'lil and power !

~jz my 2cents..

[ikan_glamour]

Check the jets to see if its worn i.e needle jet hole should be circular and not oblique, jets needle should not be worn. Check the float and it should not be puncture and the needle valve is not worn. Diaphragm should not be tear or broken. The butterfly valve should be able to open and close smoothly.

 

For cleaning just buy a spray can of carb cleaner and spray through all the holes, take note to remove the o ring and plastic parts first. Add a in line fuel filter to your fuel hose and your carb will be clean for a very long time.

 

Thanks fer the info bro

[ikan_glamour]

Anyone knws wat are the different with this two type of carburetor?

Flat-Slide carb and round slide carb....

[crazydj]

U need to tune-in 1st bro.. Jetting are important as it control the fc and air-intake. With the rite jetting & tuning, u get to save fc a'lil and power !

~jz my 2cents..

 

You mean the carb is not set at the factory settings? Because my bike is 100% stock.

[ikan_glamour]

You mean the carb is not set at the factory settings? Because my bike is 100% stock.

 

I gues u still need to do tuning bro.. even if ur bike are in stock condition, ur new carb still need to be "adjust" to ur engine needs..

 

~correct me if im wrong

[ikan_glamour]

Anyone? I mean regarding the D-slide and Round-slide Valve??

Edited October 31, 2010 by ikan_glamour

[Raptor]

Leave the aftermarket carb settings to mechanics who have raced before. Not just any mechanic.

 

An aftermarket carb works best with a ported engine and an unrestricted exhaust... if not you are just wasting your money.. stick to your stock carb for a stock bike.

 

Go to Abboy Motor Racing at Kallang Ave Industrial estate... see the trophies on the shelf. That is a mechanic who can tune a carb to race standards.

 

Ever see a Yamaha Y125Z that can rev to 15,000 rpm and over take a DRZ400SM on the straights and exceeding 170 KMH??

 

It's sitting in the shop.

[KeraKing]

Anyone? I mean regarding the D-slide and Round-slide Valve??

 

flat slide & d slide generally offer quicker response than round slide.

d-slide answers some of the flat slide's shortcomings.

 

i've had the slides sticking on my flatslide carb.. after open throttle, cannot close.. haha

 

anyway, have u changed to carbon reed valves yet?

it gives crisper response as well.

 

when changing to aftermarket carb, my opinion is to change to bigger mm for more difference.

[ikan_glamour]

Leave the aftermarket carb settings to mechanics who have raced before. Not just any mechanic.

 

An aftermarket carb works best with a ported engine and an unrestricted exhaust... if not you are just wasting your money.. stick to your stock carb for a stock bike.

 

Go to Abboy Motor Racing at Kallang Ave Industrial estate... see the trophies on the shelf. That is a mechanic who can tune a carb to race standards.

 

Ever see a Yamaha Y125Z that can rev to 15,000 rpm and over take a DRZ400SM on the straights and exceeding 170 KMH??

 

It's sitting in the shop.

 

Thanks fer the info

[ikan_glamour]

flat slide & d slide generally offer quicker response than round slide.

d-slide answers some of the flat slide's shortcomings.

 

i've had the slides sticking on my flatslide carb.. after open throttle, cannot close.. haha

 

anyway, have u changed to carbon reed valves yet?

it gives crisper response as well.

 

when changing to aftermarket carb, my opinion is to change to bigger mm for more difference.

 

Do u mean the Boyeseen(spelling error) carbon reed valve?

Any idea whre culd i buy them?

Edited November 2, 2010 by ikan_glamour

[ikan_glamour]

Thanks fer the info & help guys

Any more futher info regarding carb related issue on most 2B classes, just say it out here. Would be nice to learn frm the pros

[Pandoras Kitten 3]

Ever see a Yamaha Y125Z that can rev to 15,000 rpm and over take a DRZ400SM on the straights and exceeding 170 KMH??

 

It's sitting in the shop.

 

I think I just drooled.

 

Love the 125Z, even though mine was stock. Not sure how the mechanic managed to make mine get 39km per litre of fuel (cruising at 130kph) but I suspect he knows some ancient chinese secrets

[ikan_glamour]

Ok, i just heard theres a POWERNOW for a carb tat actually improve the lower end.. Anyone tried this before?

[Joe_Boxer]

Spark135 might using the powernow in their carbs, saw that thingy plate at my friend carb wen he service it. He told me that, it improve the lower end acceleration..

[MiddleAgedBiker]

You mean the carb is not set at the factory settings? Because my bike is 100% stock.

 

If your bike is stock then the factory jetting and needle will be the correct one. It's plug and play. You only need to mess with jets if you change to a free flowing exhaust and air cleaner, or if you port your engines.

 

It doesn't hurt to just get a ruler and check that the float seat height is ok. It should be, but since it's so easy to check, I'll just check.

[Joe_Boxer]

I jz bought a 32mm UMA carb and the prob is i dunno wat jetting size should i buy for my 150cc kr bike.. Current jetting is 124main & 40pilot so any krr rider here use same carb with rite jettings? Care to share?

Edited January 4, 2011 by Joe_Boxer