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carb modification

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lanno

New Member
Traxx, i would appreciate if you could explain of how the standard carb do function including the Main Jet and Pilot Jet plus tuning the two buttons outside the carb. Thx Bro

p/s: if possible in overrall the function of the stock carb.
 
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lanno

New Member
not forgrtting thr jrtting as well. How is these all inter related to each other to give out better performance to the stock blok or extra large block.
 
turbulence

turbulence

Super Veteran
traxxas-modifier said:
Today opened my carb and made some modification.

if youve noticed in the carb pics above, the Holder of choke butterly.
is very big, it hinders the flow of air...

so i decided to trim it off on slanting so that the air will go up something like aerodynamic :) im messing my carb because anyway its my carb :)
whatever happens it will be my bike that will be messed up...

the result is.. :)
HEHE good response
the good result might be because of my cleaning to my carb...
or the mod i made also made some good results...
but the good thing is im satisfied..

my info here is just for educational purposes, dont blame me
if it breaks your bike...
Click to expand...

Sir, base on the drawing on the air flow, woudn't it be better to remove the whole choke holder? So there will be no intervention with the air flow?
 
axon

axon

Super Veteran
IMHO,

from stock engine, changing carb. means we need a more fuel and more air, and a good SP but imagine the stock intake and exhaust stem valve, and the manifold between head and carb. the inner diameter does not change means the air velocity and air volume entered in combustion chamber still the same, then why we need to upgrade for bigger carb if we're still in stock mode? what i mean is stick with our stock and focus on head work first, our engine is 4t not 2t in 4t we have cam and valves means we have a duration for opening and closing of this 4 valve unlike 2t only reed valve, that's why the 2T engine produce more rpm than 4T even the 2T engine has smaller capacity, i'm gonna touch my carb if i change my 4 valves to bigger size, if re-jetting and spark plug color checked does not work well then that's the time for bigger carb. just a cents of noob idea...

please feel free to enlightened me ...
 
j_caldeojr

j_caldeojr

Veteran
I just have a little question regarding on the stock carb for the sniper, what is the stock main jetting of the stock carb and the pilot jet also for the stock carb?

Thank you very much
 
alx.cruz

alx.cruz

Super Veteran
Anyone ever tried to check if the Yoshimura TMR-MJN (MJN) Needle Jet would fit to an ordinary Mikuni TM28?

If yes, is this MJN needle jet being sold separately?
 
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