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Old 01-28-2015, 03:34 PM
frank66 frank66 is offline
Motorized Bicycle Elite Member
Join Date: Jan 2015
Location: canada
Posts: 207
Default Re: Curious about the engine, :question:

both my zaf50 and zaf80 are gt5a but i disagree see below.

. they both are 38mm stroke i believe. 40mm inlets on both. large transfer tunnel.

i have seen two blocks with large or small transfers passages aswell.

i have never seen a pk80.

there is no specific engines just choices. 3-4 cyiinders. 3 rods. 3 blocks. 4 cranks...... 4 pistons. 5 heads etc etc.... when buying the grubee's anyway.
the pk80 i dunno.....I dont know how may ways you can build the 40mm stroker....

Last edited by frank66; 01-28-2015 at 05:35 PM.
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