Features :
- O.S 12520 .25XZ (P) ABC 21JN Slide
- Designed for 1/8 scale truggy racing competitions
- Meets ROAR regulations
- ABC piston and liner construction "A"luminum piston fitted to a "B"rass cylinder liner that is "C"hrome plated
- Three needle 21JN slide valve carburetor
- 8mm red carb insert for smaller tracks that restrict air intake
- Ten fin blue anodized cooling head with inner head button
- P3 ultra hot turbo glow plug

Specifications :
- Displacement: 0.25 cu in (4.09cc)
- Output: 3.1ps/33,000 RPM
- Bore: 0.689" (17.5mm)
- Stroke: 0.669 cu in (17mm)
- Practical RPM Range: 4,000-39,000 RPM
- Weight: 13.05oz (370g)
- Distance between Mounting Holes Same Side: 0.83" (21mm)
- Distance between Mounting Holes Opposite Side: 1.4" (37mm)
- Length from Backplate to Drive Washer: 2.6" (65.6mm)
- Width of Mounting Flanges: 1.8" (45mm)
- Width of Crankcase Below Mounting Flanges: 1.2" (31.6mm)
- Distance from Crankcase Center to Drive Washer: 1.7" (44mm)
- Height/bottom of Mounting Flanges/top of Cylinder Head: 3.7" (93.2mm)
- Height/bottom of Crankcase/top of Cylinder Head: 4.3" (109mm)
- Needle Settings: Preset at factory, start engine as is. If adjustments are ever required, make them in small increments.
- High Speed: 3.5 turns out from fully closed
- Metering Needle (low speed): Rotary: flush with carb body
- Slide: Flush then 1/2 turn in
- Throttle Stop Screw: .5mm out from fully closed

Contents :
O.S. Max 25XZ (P) Truggy Engine with instruction manual, 8mm carb reducer, exhaust gasket, dust cap set, instruction manual and P3 turbo glow plug