Yamaha AEROX loss of power

[nellee]

been asked a by a friend of mine to ask a question, anyone know know anything about twist and go's...? see message below.
Thanks
Paul



My son has a yamaha aerox n it's poorly ha ha, they put a new crank in it but it doesn't seem 2 have much power. Any ideas xx

[dayle1991]

i used to have a twist n go mine had a loss of power turned out the piston rings had broken up, scored the barrel and loss of compression.

[triffid]

Rubber baaand busted? ;D

[tony]

could be loads of things mate.. Try to find out more. Why did they fit a new crank.. who did the work .. stuff like that.

[gazspeed]

Crank not pressed in properly putting massive strain on one side's bearing.

Oil seals / Gaskets re-used and leaking

Variator rollers cockled over after re-installation