This is the O.S. Speed B2101 Off-Road Competition Buggy Engine. The B2101 was developed to fill a hole in the O.S. engine line with an engine that produces a smooth power band, ideal for slick or blown out tracks. It's square 16.4mm bore/stroke dimensions, combined with a DLC coated and balanced OSSPEED tuned crankshaft create the perfect blend of power and driveability. Other features include a low slung, low CG cooling head that hangs below the engine case, for improved handling, and the renown 21J carburetor for easy tuning adjustments. Additionally, 6 and 6.5mm carburetor venturi's are included to tune the engine for various track conditions. 

Features:

l Machined low center-of-gravity cooling head

l Reliable 21J carburetor

l Square 16.4mm bore/stroke dimensions

l Smooth power band

l DLC coated and balanced OS SPEED tuned crankshaft

Specifications:

l Displacement: 3.46cc 

l Output: 2.61ps @ 34,000 rpm 

l Bore: 16.4mm 

l Stroke: 16.4mm 

l Practical RPM Range: 4,000 ~ 42,000 rpm 

l Weight: 352g 

Included:

l T-P4 plug

l 6mm & 6.5mm Venturi's

l Exhaust Gasket

l Dust Cap Set (3mm/16mm/18mm)