- Brand: O.S. Engine
- Model: OS1DL02
- SKU: 00123798
This is O.S. Engine B21 ONGARO Edition World Champion Combo Set w/ TB02 EFRA2089 + MB01-75. This time, "O.S. SPEED B21 ONGARO EDITION", which has been modified according to his feeling, was born! Based on the latest off-road engine O.S. SPEED B2104, the crankshaft has been changed to a counter web shape and use of single tungsten weight crankshaft specially made for this engine to suit his driving style. The inner head is also specially designed combustion chamber, and the synergistic effect of these realizes a smooth feeling and more powerful top end. In addition, the outer head adopts a standard round type, and the laser marking of ONGARO's original logo mark creates a racing atmosphere. A new size φ5.8mm / φ6.3mm black anodized restrictor is also used for the carburetor to create an "Engine that can win big races" that matches his requirements. Includes the TB02(As known as T-2090) EFRA 2089 tuned silencer and the exhaust system of the / MB01-75 (75mm) manifold.
The outer head adopts a new design. Lighter weight and lower center of gravity improved performance.
The laser design has been brushed up from the previous work, and the anodized with Ongaro’s requested color jewelry blue.
The crankcase features a shiny logo on the side to emphasize its glossy surface, and the front is laser-marked with the "WORLD CHAMPION" logo.
The reducer adopts φ6.5mm which was used at the time of the world championship. The anodized color has been changed to match the outer head.
Displacement: 3.49cc / 0.213 cu.in.
Bore: 16.27mm / 0.641 in.
Stroke: 16.80mm / 0.661 in.
Output: 2.68 ps / 2.64 hp / 34,000 r.p.m.
Practical RPM Range: 4,000-42,000 r.p.m. weight:352g / 12.42 oz.
Glow plug T-P3: Reducer φ5.8, φ6.3 Exhaust Seal Ring
Dust cap set: (φ3, φ16, φ18)
O.S. Engine B21 ONGARO Edition World Champion Combo Set w/ TB02 EFRA2089 + MB01-75 (1 set)