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I have just received a fairly decent looking GPX.
It has low compresion on the mag side, missing the CDI and secondary clutch.

I have a GP 440 motor with these parts; my question is will the GP piston and ring fit the GPX?
Will the GP CDI work? Any help from you Yamaha gurus would be greatly appreciated :)
 

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I don't think the Gp clutch will work .... and the Gp has points not CDI as for the pistons in the book they look like the same motor same specks ... I don't know .... ???? I sent you a message ... I have a 75GPX ... good for parts
 

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hi i have a 75' gpx433 fan, it has points and condensers
no cdi, and an inline(1 wire) voltage regulator!
hope yhat helps ya !! :thumbsup:
 

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I had a 75 GPX 338

Fast and light considering year :sly:,aluminium skis, chrome ski shocks

When I blew the engine I put a 71 Yamaha 396 engine in it with STX 340 cab
 
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