MY ZX50 O.E.M CARB TUNING

[wordslinger]

maybe you WERE on to something over there

..just think of it like this...

..colder air (oxygen) is more dense (thicker) than hot air...

..it's molecules are closer together...

..when air gets hotter, it's molecules spread further apart..(hot air baloon rises in the cool morning air)

..with "thicker" air, it is necessary to increase fuel, in order to keep the mix ratio in check...

..and with a free-flow air filter, the density of the air inducted greatly affects how much fuel is needed to keep the mix right...

..it's a battle when the temps vary 30-40 degrees in a day, as they can here where i live...

[sidthesloth]

Well explained wordslinger, I have a better idea now. You are right, a 4 stroke engine runs cleaner, so you woule need a longer run. Batman, I did the check and the stock inlet wont fit on the reed cage, will put up some pics when I get to the computer. Wow, that stock carby is TINY.

[wordslinger]

..thanx sid...

..i've been battling spring and fall around here for a cpl years...

..and i thot i'd kinda gotten a handle on it...

..but this opened exhaust has thrown a bit of a curve...

..guess i'm still learning too!!!...

[sidthesloth]

Yeah, more air flow good, but more effect from changing weather conditions.

[wordslinger]

..YUP!!!..

[wordslinger]

..and this forum is frikin awesome..

 

..i learn..SomeThing!! every time i'm here...

 

[sidthesloth]

Righto batman, here are the pics, bear in mind this has been used for work and is dirty, hasn't been washed yet, won't happen until the end of the week, (she's a work horse, not a show pony).

[wordslinger]

...sid!!...

..NICE PICS!!!

..where th' hell's th dirt!!

 

[sidthesloth]

 must be a crafty camera man, even cut out the dirt without even noticing, yeah, it's there, just out of sight. I took some other pics for a bloke on ZX50 board about removing the body, I think they show some grime.

[thebatman]

  well then....     and thats the way it is..   so if it gets any hotter than this week, she is gonna bog cuz of being even ritcher???. come spring time gonna have to downjet a tad??.. you are the closest to me here. even tho im alot higher, which i guess even frkn altitude comes into play somehow.. i do hope(maybe),that the rs pipe leans it a tad tho.. the last mix ring i had was about 5-6 shades lighter than the one i have now, and she ran pretty good with that faint mix ring. the ring now is a darkish brown(which i assume is on the line of being to big)?..

[wordslinger]

..yup...air is thinner at higher altitudes...

..and your kinda up there, compared to the rest of us....

[thebatman]

well dam...thanks sid...yeah, that intake wouldnt accept my pissy ass carb.   dam, i need the lottery.

[thebatman]

yeah, thats for sure, so what do you do for THINNER air???......

[wordslinger]

so what do you do for THINNER air

..decrease jet size...

[sidthesloth]

I forgot how small the stock carb was, when I pulled it out of the box and unwrapped it the first part I saw was the throttle body, I couldn't even get my little finger in there. I got used to the 24mm jobby.