OSR2106PBI O.S. SPEED R2106(PBI) Pre Break In Engine1EY04

This means the engine is factory pre-run (pre-break-in) before being sold.
The goals are to:

• reduce the break-in time,
• lower the risk of engine seizure during the first start,
• provide better stability from the first fuel tanks,
• allow faster tuning and setup at the track.

The O.S. SPEED R2106 is a factory-tuned engine meticulously developed for 1/8 on-road racing competitions.

This new powerhouse features a 9-port cylinder liner with redesigned ports, delivering enhanced performance.

To ensure a robust power delivery from the low end, the crankshaft from the R21 Euro II has been incorporated, along with highly acclaimed ceramic ball bearings from off-road engines.

The newly designed, reinforced connecting rod is now more strong, capable of enduring the rigors of intense on-road racing conditions.

Here the official break-in procedure provided by OS :

Specifications

Content: 3.49 cc 
Bore: 16.08mm  
Stroke: 17.20mm  
HP: 2.8 ps / 2.76 hp at 33000 r.p.m.
Practical range: 4000-45000 r.p.m.
Weight: 340g