need help jetting

[hoax]

i bought my ex already with a full yoshi and am in the process of putting a twin air on it. my question is that i got a 152 main jet for it and it doesnt look like tha 138 size main jet that is already on it, it doesnt have the flat head on the top of it. also is this too big of a jet? i live at around 5500 feet. and also do i need to replace the main jet if i am just putting a intake?

[wcbomb]

you have a dyno jet , stock ex jet is a 148 kehein, 152 isn't much bigger, but that depends on temp,elavation, and humidity. Might need to check the needle dyno jet needles and kehein needles are differant a pain to get jetted right if not the same. hope this helps.

[hoax]

what do you mean its a dyno jet the jet that i found on my ex has 2 parts to it and the one i bought has 1 part to it, is this what you mean? and i cant tell it if have a dyno needle because i do not know how to get the slide off. also i first though that it was a 138 jet because i live at high altitude and very very dry(Utah)