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Old 02-06-2015, 07:26 AM
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cannonball2 cannonball2 is offline
Motorized Bicycle Elite Member
Join Date: Oct 2010
Location: Colonial Coast USA.
Posts: 3,286
Default Re: Curious about the engine, :question:

When this DragonFire engine came out I began to look for a intergrated CDI that would work with the CG rotor. The rotor is very small and the units I thought of from weedeaters were radiused for a larger flywheel. Havent given up yet. We all know that even the Chinese throw away trimmers have no/little ignition issues and are often left out in the rain on trailers of landscapers. This is the way to go.

After all this discussion it seems the only way to get a piston to the top 38mm engine is to use the crank with the 114mm FM80 rod and its matching piston. These are I believe Grubee parts. I think my engine in a box is basically a GT5. The stuff looks like Grubee quality. The GT5A/Super Rat? has a different jug, its the one to find. I believe it will have a 50mm exhaust stud spread? If that is the case then it must be design ported for that crank/piston combo since the jug would be a recast anyway. Seems the ignition was the main issue with this engine.
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