I want to change the jets in my bike?

[bogan]

washers were for 3mm bolts and they were the perfect .5mm

To be honest i wasn't expecting the washers to fix the 4,000 thing cos well i've adjusted the air fuel ratio via the pilot screws and that didn't change it.

i have fix 2 major air fixes . one being there was only 1 of the 4 bolts holding the slide cover on.

Im tending to agree that it's likely to be a balance issue not a fueling one. Still i think it needs a rejet.

This place looks good for jets for my carbs

http://www.pjmotorsports.com/keihin-jets.html

Repeat it with me, the pilot screws only change the very low end air/fuel mix it does not adjust the air/fuel ratio across the whole range!

do the plug chop, there's not a lot of point adjust bits willy nilly, especially if you want the carbs to stay balanced (there 2 or four of them?). Getting an idea of what is happening at the moment will enable you to choose the right jets to put in. Though I'm assuming you have checked the current ones for wear and that they don't just need replacing?

[Ultrasonic2]

Repeat it with me, the pilot screws only change the very low end air/fuel mix it does not adjust the air/fuel ratio across the whole range!

do the plug chop, there's not a lot of point adjust bits willy nilly, especially if you want the carbs to stay balanced (there 2 or four of them?). Getting an idea of what is happening at the moment will enable you to choose the right jets to put in. Though I'm assuming you have checked the current ones for wear and that they don't just need replacing?

dood you know less about carbs than i do

your posting links to carbs that dont have SLIDES in them

Heres a link about slide carb fueling
http://hondanighthawks.net/carb14.htm

http://hondanighthawks.net/carb14_files/image007.gif

and like in the pic the pilot screw DOES affect feuling across the whole rang. Since i've been playing with it i know for sure it does too.


Also the spark plug thing is right and i've done that on cars but it's completly impractical to do on a ZXR. to get the spark plugs out you have to take 1/2 the bike apart and thats not practical on the side of the road.

[bogan]

dood you know less about carbs than i do

your posting links to carbs that dont have SLIDES in them

Heres a link about slide carb fueling
http://hondanighthawks.net/carb14.htm

http://hondanighthawks.net/carb14_files/image007.gif

and like in the pic the pilot screw DOES affect feuling across the whole rang. Since i've been playing with it i know for sure it does too.


Also the spark plug thing is right and i've done that on cars but it's completly impractical to do on a ZXR. to get the spark plugs out you have to take 1/2 the bike apart and thats not practical on the side of the road.

ahh yes, the slideless carb, the holy grail of motorcycle fueling technology

If you read the article it also says

Both the pilot air screw and pilot jet affects carburetion from idle to around 1/4 throttle

But fuck it, you obviously know how to keep a bike in tune right?

[MSTRS:Me]

dood you know less about carbs than i do

\

With that attitude, don't be surprised if all the friendly, helpful, knowledgeable people, whose brains you want to pick, tell you to go fuck yourself...

[Taz]

Well ya get what you pay for

[Katman]

Still i think it needs a rejet.

Based on what - your extensive knowledge of all things mechanical?

[Ultrasonic2]

Any one else want to have a go ? for no apparent reason ?

I dont know what you lot are making such a big deal over Bogan man ways the one posting unrelated info NOT ME.
Im not to worried about it we've all been there before posting before reading the previous posts or missunderstanding them

But feel free to join the band waggon anyway, Not that it helps anyone in any shape or form.

Oh well

[Katman]

Any one else want to have a go ? for no apparent reason ?

Don't take it to heart but you clearly don't know shit from clay.

[Ultrasonic2]

Don't take it to heart but you clearly don't know shit from clay.

i dont take it personally

and yet again i'll point out that Bogan was wrong and i was right so Although i agree i don't know all shit. i do know some shit.

Now i realise that this pointless name calling may never stop so i wont reply to anymore of this sillyness . Obviouly if it's topic related i will though

Thanks guys for your suggestions so far and your friendly banter :-)

[bogan]

i dont take it personally

and yet again i'll point out that Bogan was wrong and i was right so Although i agree i don't know all shit. i do know some shit.

Sometimes when you explain things to people who are learning, you simplify things a bit, yes the pilot screw may change the top end/mid range mix slighty, but it is not what you use to adjust it properly! Some would actually consider that helpful advice.

I'm sure theres a witty analogy comparing that with some other adjustment, but I think I'm already being generous enough in that I haven't told you to go fuck yourself with a plug spanner.

[Ultrasonic2]

, yes the pilot screw may change the top end/mid range mix slighty, but it is not what you use to adjust it properly!
.

i agree that adjusting the pilot screw is the INCORRECT way to richen the bike which why i started this thread about changing the JETs.

[sinfull]

My bike's running rough too but i dont think it's the jetting

[Drew]

I kinda haven't seen anything so far that shows the carbs are the right place to be looking for the problem. At 4000rpm the bike runs rough on a low to medium throttle yeah? So it runs fine with the throttle WFO (wide fuckin open)? If it's fueling causing the problem, I'm willing to bet it's getting air that it shouldn't be.

Only time I ever managed to correct an issue such as this however (after ruling out an air leak), was to do the valve clearances. Most of the older bikes stop getting proper services these days, and this is a rather big one to stop doing.

[MSTRS:Me]

My bike's running rough too but i dont think it's the jetting

Rolls Royce aero engine, is it? Even though your post has little bearing on this thread, I'm sure there's a jet involved in there somewhere...

[schrodingers cat]

Why not take it to someone who knows this shit. Ask them to explain what they did and why.


That way you'll learn something without all the grief.
They may also diagnose an entirly different issue.

A wise man learns from others mistakes.
It may be that YOUR purpose in life is to serve as a learning experience for others