what kind of mods should i do to my stock air box to make it best possible?

 

www.50mods.com

 

you should do no mods to the air box or the pipe
https://www.stuntlife.com/forums/sho...d.php?t=127047

 

lets if i understand correctly:

xr70 carb, intake and airbox on a stock 50 is the best light tuning? sounds like itll work, anything else need to be done??

 

ride the dog **** out of it

 

ohh yes it will be done

 

BTW. what sizes jets should i get with that xr70 carb? gotta be rejettet since its jettet for a 70cc right?

 

none
bolt it on and ride it

 

thanks again Z50

 

no prob enjoy

 

You could always go with the cheap way of modifying your air box like i did...take off the air box and put up a lil bracket to hold the stock filter in and then drop the pin down a notch and mess around with idle a little and you got a lil more power for free.

 

I recently purchased a xr70 carb and intake and it is not a direct bolt on. I had to replace the cable which luckily came w/ the used carb. You will have to use an aftermarket air filter or the stock 70 airbox which luckily came w/ the carb. I also had to cut the intake in two, turn it slightly, and weld it back together b/c the intake would not sit flush w/ the head b/c the throttle cable was hitting the frame. I also recommend that you port the head to match the intake or you are just wasting your time b/c the intake port for the 70 is a lot bigger than the port on the head. Just my .02

 

nice of you to tell so we know how does it run??

 

Had to clean up the weld today at work. Will probably mount it again on Monday and make any adjustments necessary and let you know. I have a feeling the low end response is not going to be what it used to but we will see.

 

you have to use the new 70 intake not the old one
mine bolted right up.... runs sweet u do have to cut and turn about
6 degrees on the older ones

 

http://www.starboyz.com/vboard/showt...threadid=15712
StarBoyz Forums - bought crf 50

 

http://www.ministothemax.com/hop_ups_airboxmods.htm