help with thunder tiger engine upgrade

[mullion]

hi i have purchased a thunder tiger pro 18bx to replace a worn out pro15 bx only to find the the shaft is different and the clutch components dont fit what do i need to do and which components do i need, or should i return the engine and fit a new pro 15?.

many thanks

[^j!nx^]

cant help your problems, but where did you get the pro18 from?

[mullion]

got the pro 18 from my local thunder tiger dealer.