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Old 02-25-2013, 09:40 PM
denmasardhy denmasardhy is offline
Motorized Bicycle Member
Join Date: Feb 2013
Location: Indonesia
Posts: 26
Default BMX with 35 cc 2-stroke engine - 3rd

hello builders,

this is the 3rd build and just tested last night
started when i got $25 used 35 cc 2-stroke engine at flea market
tried to use 24" front wheel but doesn't seems nice with the frame geometry
the rpm reducer using the same method with 2nd built, front pulley and rear chain

had to trim the frame middle axle to get center positioning of the engine, and correct alignment between engine sprocket to wheel sprocket to prevent derailed chain

disc brake is used for the front wheel and rear with V-brake. engine mounting using double-layered slim plate to reduce engine to frame vibration. the plate at 2nd built is thicker and cause engine vibration propagate to frame

the max speed and acceleration is not yet per expected approx 35 km/h only, also compared with the 2nd built. will need to check the ratio, carburetor and clutch
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