Stock: In Stock
RETROL R30 4.2cc Panhead-Style V-Twin Engine Model is a compact panhead-style 4.2 cc V-twin that presents a distinct head and external architecture fr..
-51%
$783.99 $1,607.18
Stock: In Stock
RETROL R31 4.2cc OHV V-Twin Gasoline Engine Model is a ready-to-run 4.2 cc air-cooled OHV V-twin with motorcycle-inspired external styling and visible..
-51%
$685.99 $1,406.28
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Compare miniature V-twin motorcycle engine models by head architecture, displacement, bore and stroke, cooling method, ignition, starting procedure and supplied assembly state. Product pages distinguish operational supplier specifications from independently verified engineering guidance.