O.S. Max B21 Engine
$275.00 – $325.00
For 1/8 nitro Offroad and 1/8GT
MAX-B21 is easy to use from entry-level users to sports users and has excellent cost performance. Based on the O.S.SPEED series engine, it has a well-balanced combination of smooth speed and power delivery can be used in both on and off-road racing situations.
The outer head is based on MAX-21XR-B VER.3, it has been reduced weight for better performance. Also the shape of the combustion chamber of the inner head has been revised to improve combustion efficiency and response in the low speed range.
In addition, more stable idling, avoids stalling equals to easy carburetor adjustment.
・P3 glow plug・Reducer 6mm(Orange) and 7mm(yellow)・Exhaust seal ring
・Dust cap set 3mm/16mm/18mm
This engine comes with or without EBIS Break-in.
- Description
- Additional information
Description
Specs
| Displacement | 3.49cc / 0.213 cu.in. |
|---|---|
| Bore | 16.27mm / 0.641in. |
| Stroke | 16.80mm / 0.661in. |
| Output | 2.6ps / 2.56hp / 34,000r.p.m. |
| Practical RPM range | 4,000-41,000 r.p.m. |
| Engine Weight | 361g / 12.73oz. |
Additional information
| Weight | 1.2 oz |
|---|---|
| Dimensions | 6 × 5 × 4 in |
| EBIS Break In Option | EBIS Break in, No EBIS Break in |
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This product has multiple variants. The options may be chosen on the product page
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This product has multiple variants. The options may be chosen on the product page
Select optionsThis product has multiple variants. The options may be chosen on the product page
FEATURED PRODUCTS
Engine Break In Service
$50.00
Sleeve Resizing Service
$25.00
Engine Bearing Replacement Service
$30.00 – $40.00
