125 airbox on a 50

could i use my old sr125 airbox on a 50sp runner?
and also what jet does a standard runner come with

thanks
G

 

if it fits on then you can and take the float bowl off the bottom of the carb and see what the jet has written on it

 

ok cool, i know ive got a 98 jet but i wanted to know the original size for a webber so i could get a rough idea of what size jets to get to test

 

you wouldn't have to upjet by changing a 50 airbox to a 125 one or you shouldn't anyway, i thought they were practicly the same

 

yea but i need to know anyway as its spitting petrol so jets to big

 

mosr carbs are different i doubt theres a definate standard jet

 

but every 04 runner 50 sp with a webber carb must of had same jet size

 

it does vary i think

 

that makes no sense to me what so ever lol

 

There is a standard size. Usually states it in the Haynes manual.

 

ok thanks