Another pic after painting.

Another pic after painting.

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Ok - finished my paint work.

Ok - finished my paint work.

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Another close-up of my rat-rod exhaust. Also, you can see how the original crank hit the gearbox.

Another close-up of my rat-rod exhaust. Also, you can see how the original crank hit the gearbox.

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Moving along with the build ...

Moving along with the build ...

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The HS engine mounted. Here the original Firmstrong crank and sprocket are still installed.

The HS engine mounted. Here the original Firmstrong crank and sprocket are still installed.

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Close-up of exhaust - I had to cut and re-weld the exhaust to tuck the muffler in closer to the frame. Of course, that ruined the chrome plating, so

Close-up of exhaust - I had to cut and re-weld the exhaust to tuck the muffler in closer to the frame. Of course, that ruined the chrome plating, so

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Progressing along - just got the engine working here, but still have the original forks and handlebars on the bike.

Progressing along - just got the engine working here, but still have the original forks and handlebars on the bike.

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Build-in-progress

Build-in-progress

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Build-in-progress

Build-in-progress

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Grubee gearbox

Grubee gearbox

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49cc of Chinese goodness!

49cc of Chinese goodness!

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All the installation parts which came with the engine kit

All the installation parts which came with the engine kit

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The original Firmstrong CA-520 bike

The original Firmstrong CA-520 bike

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Close-up of left side of engine - that rear sprocket is a biggie - top end speed is limited to about 25 mph, but the bike will climb up cliffs -- well

Close-up of left side of engine - that rear sprocket is a biggie - top end speed is limited to about 25 mph, but the bike will climb up cliffs -- well

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Close-up of my front suspension contraption - modified springer fork to fit my big head tube

Close-up of my front suspension contraption - modified springer fork to fit my big head tube

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Close-up of right side of engine (very tight fit of air cleaner to frame tube)

Close-up of right side of engine (very tight fit of air cleaner to frame tube)

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S

Sprocket196 Bike Build

Firmstrong CA-520
HS 4-stroke engine, Grubee gearbox
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