Help ID a 2 stroke engine

[d72hemi]

Hello all,

Please help me ID the engine in my bike. I was told it was a 49cc engine, but it looks just like the 66cc engines my friends just bought, and I am faster than them (acceleration and top speed (46 KPH/29 MPH).

Background:
This is my first post, and will not be the last! I was given a motorized bike because the last two coworkers could not figure out how to make it run. $12 (fuel line/filter misc nuts and bolts), and 45 minutes later I had her running. The current frame is a late 90's Specialized Hardrock (CoMo, heavy), but I have ordered a GTA (150mm) frame and HD wheel from bicycle-engines.com to perform an "engine swap", complete with disc brakes (203/180mm). I am going with an American-to-English bottom bracket adapter to run a 3 piece crank since I have access to a number of junk/abandoned bikes (military base, people leave and just leave their bikes). I have read most of the dragonfly75.com pages, along with many post here and can't wait to see how far I can push my bike while pretending to be within my budget. LOL.

Ian

 

[crassius]

the size of the acorn nuts on the head would be right for some kind of 66cc motor

 

[d72hemi]

Crassius,

Thanks for your help. I was thinking it was a 66cc motor since it would out pace my friends with 66cc motors, and that the exhaust muffler was what comes stock on many 66cc kits. Now I know where to start whenever I decide to build more power.