yamaha aerox 50 .Just put a 70cc big bore kit on ,want to know what size jet to put in at moment it is a 120,when setting off it splutters then it picks up and seems ok

colin, February 2009

I've got a motoforce 70cc bore just put in my ped from a 50s, I've got a 17.5 carb wiv a 80jet and it pulls away like it's stuggerling n when I get to about 30 it doesn't go any faster n splutters bad I tried putting a 95jet in it and full throttle it won't even pull away with me on it, really need help feel like smashing the Pieace of shit up

Tom, April 2013

i hav an aerox mbk nitro 70cc 2000 plate went over a curb buy accident lol and it cut out we got it started road it for ten mins n it cut out again and wunt start its gettin fuel its wontin to start put its just not firing up iff u no what i mean we got it started but taking the fuel pipe off kicked it while the petrol wo cuming out of the pipe n it fired up did that twice and now it wont do it any ideas thanks

james, January 2013

Hello my aerox is still a standard 50cc i have modified it with an arrow sports exhaust and a K&N airfilter it has a 70 jet inside the standard carb 17.5 what would you recomend for upjetting it seems to run ok but takes a little while to pul away and i dont think theres enuff fuel going threw

Ryan, November 2011

how much thottle is there on yammah aerox 50

dean mccloud, October 2009

120 is to big, unless you have more modifications to the bike.
the standard size for a aerox is 67 i think, when you add ever a 70 kit, k&n filter, or sports exhaust you have to upjet it by 15% for each.
The idea it is spluttering seems to show that there is ever to much fuel going in, or to little or to much air.
When you drive put your choke on and open the throttle, if you suddenly pick up speed it means that the jet is to small or there is to big a supply of air.
I would also reccoment buying a larger ignition coil, it helps to burn the fuel faster and hotter, which is better when fitting on a 70cc kit.
Hope this has been helpfull.

Chris., May 2009