Few bits and pieces that could actually give you reasonable to large power gains:
- DHZ outer rotor kit , adj ignition maps and heaps better than a shitty IRK: $99
- Oko vm26mm carb kit , port and polish the included manifold : $130
- Have the head ported by Fusedmini's : $75
- Decent uni filter for the new carb: $25
- Homemade head breather , remove top tappet cover , Drill hole. Tap thread insert brass hose fitting. Relieves crank pressure build up and allows higher revs : $2 for the brass fitting
- Try some alternative gearing , depending on how you ride and where you need this 'power' - $40 for a rear sprocket , $10 for a front from Egay
- Try a different style of cam from Akunar
- 143cc-????? bore kit , lifan bvh : Depending...