carb jets

[The Pastor]

where do you buy new jets and needles from?

[riffer]

These guys (http://www.factorypro.com/) rock dude.

[The Pastor]

kinda was hopin there was somewhere local I could buy them from. Keep it in NZ and all that who ha.

Also kinda want to do it all on tuesday.

Also anyone know where to the get 0.5mm washers used to shim it up a tad?

[hospitalfood]

in auckland cycletreads have some keihin and mikuni stuff, as your location is hard to decipher i have no idea if this helps.

cheers though.

[riffer]

I've ordered stuff through my local motorcycle shops. Search back in history to find out about my trials and tribulations with the downdraught Mikunis in my RF900R.

The problem is, they just don't usually stock half the stuff. The main button jets are usually easily available, but jet needles (cause there's millions of the buggers) are usually only available ex-Japan.

However, AKL's a bigger market than Welly. You may get lucky.

[The Pastor]

ok i'll try cycletreads. anyone know what carb is on the cbr250rr? (mc22) 1992.

I think i only need the jets and can just shim the needles according to a website.

[hospitalfood]

or auckland may suck for needles as well ???
when i dynoed my last bike the great needle combo for the jets was not in stock

[hospitalfood]

hey, i have a set of 4 32mm keihin carbs off a gs 1200 ss at a great price if you think they would work, think the main is .95 and the pilot .35 .can measure spacings etc if you like, but not right now as im to pissed

[The Pastor]

This is what i need to get

118 main jets
Stock needles - 3 x .5mm washers per needle

[xwhatsit]

What are they? Keihin? Keihin have a couple of main standards; a longer hex-headed thing and a short little `hat' style one. Both were easily and cheaply available from Henderson Motorcycles (I think cost me $7?) when I fiddled with my carb.

Washers... if they're proper slide-type carbs then the washer used to shim the needles is hardly mission critical; as the needle is locked in place attached to the slide. Surely you can find something around the garage to salvage? How come you know they need to be shimmed 1.5mm exactly each?

As mentioned above, needles are a little trickier. Some of the Keihin needles have the type printed on the side, others (well they were from ooooold carbs, fitted OEM and never touched) didn't have any markings. If the needle has a model number on it that should be easy to give to a shop so they can order it, otherwise you might have to go through Honda.

[The Pastor]

What are they? Keihin? Keihin have a couple of main standards; a longer hex-headed thing and a short little `hat' style one. Both were easily and cheaply available from Henderson Motorcycles (I think cost me $7?) when I fiddled with my carb.

Washers... if they're proper slide-type carbs then the washer used to shim the needles is hardly mission critical; as the needle is locked in place attached to the slide. Surely you can find something around the garage to salvage? How come you know they need to be shimmed 1.5mm exactly each?

As mentioned above, needles are a little trickier. Some of the Keihin needles have the type printed on the side, others (well they were from ooooold carbs, fitted OEM and never touched) didn't have any markings. If the needle has a model number on it that should be easy to give to a shop so they can order it, otherwise you might have to go through Honda.
Hey dude, thanks for the reply.

I know it needs to be shimmed 1.5mm becuuse the internets told me so (im replacing air box with pod filters).

Im not sure which carbs they are? I sussposed they are stamped on the carbs somewhere? honda cbr 250 rr (mc 22) 1992 if anyone knows?

[The Pastor]

I think i found half mm washers at unitec, but i cant take them cos theres a video camera on me :S

[koba]

When pissing around with my KLR engined raosd race BEAST I found it really handy having some propper (real thin) shims and a few washers so I cound mix and match for many different needle heights.
1 thick shim was the difference between being faster than some RD350 and slower than the same RD350 down the main straight.
If you want to get real podantic you cound find a stack of washers above 1.5mm and some time to sit there with some valve grinding compound a a peice of glass, but that is taking it a wee bit 2 far!

[xwhatsit]

Hey dude, thanks for the reply.

I know it needs to be shimmed 1.5mm becuuse the internets told me so (im replacing air box with pod filters).

Im not sure which carbs they are? I sussposed they are stamped on the carbs somewhere? honda cbr 250 rr (mc 22) 1992 if anyone knows?

It does seem rather pedantically fine for somebody on the other side of the world to tell you that you need 0.5mm resolution, they don't know the air temp and air pressure and all that shit. Anyway though it's better than nothing.

All you really need to know is the brand of the carb. Go and look at the carbs, there should be a logo on there somewhere, probably Keihin but might be Mikuni. If you could find a model number as well.

To work out what sort of main jets you need, just take the float bowl off and unscrew the main jet (shouldn't need to take the carb off to do this). Then match it up against this website http://www.sudco.com/keihinjets.html . It will almost certainly be one of two; the 99101-393-XXX type (little hat with a groove around the top), or 99101-357-XXX (long hex head).

FWIW, what's the original size jet? (I want to move to pod too, wondering how big you're going).