first things to do to a 125cc atomic pro X (i want more power)

[BLOFLY]

hey guys

i have just bought a atomic 125cc pro X obiously they are not the best quality bike but i want it to go faster and are looking for what performace upgrades to do ect.

i have alredy done
- new pro taper 50 bars
-taken the spark arester out of the pipe (suposebly lets air flow faster)
- and put locktight on all the main bolts that keep coming loose

i am defenetly going to.
-chang sprockets (16T front 34T rear)
- Buy a quality chain
- 1/4 turn throtel
- and posably put a diferent air filter on it

and i am looking at
A big bore kit (138 i think) but i dont know much about performance mods im not looking at spending more that $300 on performance so if u have any idears on what big bore to get or if i should do something diferent to the engin 2 make it go harder that would be gr8t
sorry for the spelling and abreviations

i put a 140 lifan in my prox alloy all i had to do was grind the top engine mount back a bit so the clutch would work properly i also put in an irk, oil sling, high performance coil, 1/4 turn throttle, boost bottle, NOS, 28mm genuine keihin carby, my PRO X absolutely flies now i used to ride a WR426 im happy with my 140 now

 

[mcanix]

no way will you get a 37 tooth rear sprocket to sit on the factory hub. the sprocket would have the chain lifting off as the hub would get in the way. the smallest Ive seen is a 41 rear alloy. Yeah they are a bit dear but its a great sprocket.

 

[mcanix]

should have just bought one with a 140cc in it.

 

[stupidability]

Hi just joined i see alot of questions about the prox 125,138 ducar. I own a apollo prox 138 it is a mad bike. I must say if people go to buy one they must strip it down to a bare frame after the first ride to locktite and grease all parts.Do this with most chines bikes and they will last.

 

[stupidability]

the ducar is a good engine i have had a couple.they go hard and last long if serviced properly.change the exhaust to 30mm for about 50 bucks of ebay and a air filter to start with.that will up the power a bit .ride it till it stops and replace with lifan.no use replacing a good engine till it stops.

 

[sik-pj]

i got some small inlet pipes for sale so u can put the carby to the back.. but u need to grid the back head a lil so the ova flow can breath!!!