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O.S. 21XZ-B with DLC crankshaft and piston pin

O.S. 21XZ-B with DLC crankshaft and piston pin

O.S. XZ-B OP-1 FU

Your Price: $549.99

Free Shipping USA only

Part Number: OSMG2053-OP1

Availability: Out of Stock. Free Shipping.

Exhaust Pipe

Backplate

Description

Fully Broken-In, Dyno Tuned and Ready to Race!

Modified B2104 Crankshaft
Modified Lightened Piston
Modified Lightened Connecting Rod
EBIS Oil Bath Break-In
5 additional Heat Cycles on the Dyno to Finish the Break-In Process.
NO extra break-in needed!
Carburetor needles will be close to full tune, but may need slight adjustments.

Performance that rivals the Speed 21XZ-B Spec II
Shares the piston, liner and con rod of the Spec II
Easy to Tune 21J Carburetor with 7mm Venturi
Optimized power band

Recommended:

Buggy - OS TB-02 (2090) with 75mm Header - 30% Nitro - P3 or P4 Glow Plug

Truggy - OS TB-03 (2100) with 85mm Header - 30% Nitro - P3 or P4 Glow Plug

B2104 DLC Coated Crankshaft
Silicon-filled crankshaft with double tungsten counter weight
Low center of gravity
Blue anodized head
Incredible throttle response