you can remove the flywheel easily.. just have to remove first the clutch bell... there is an e-clip that is holding the clutch bell.. once you remove the bell you will see the clutch shoe.. you can use a clutch remover.. or if you have some small screwdrivers precision.. you can pick the springs at the center.. so you can pull out the clutch shoe...

For the flywheel. its just simple pushed fit by the lock.. you can remove it easily...

it can be that the fly wheel is slipping.. it might be the brass insert that you need to replace...

for the engine.. the one with the grey head is the same as the stock engine.. its a toki 0.05.. the blue head one is the GO engine..
I have finished the breakin period for the GO engine.. wow. its power is far better than the Toki stock.. I have not finished the tuning of the HSN and LSN.. but wow. the power is there... the 0.98cc engine has good power.... far better than the toki one...

here is a short video after the breakin...

[link]http://www.youtube.com/watch?v=GU4m9axSMac[/link]