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While acquiring the smooth sensation and excellent fuel efficiency of the previous model O.S.SPEED R21GT, which was well received in the European market, the home of GT vehicles, the power sensation in the medium and low speed ranges has been improved by modifying the counterbalance of the crankshaft. In addition, the newly created inner head enhances idling performance, and an inner head O-ring is used to reduce vibration and improve dust resistance. The external head has been lightened, and has developed into the O.S.SPEED R21GT II with attention to the detail. O.S. Engines likewise has a combo set with TB01 (EFRA2042) tuned silencer and MB01-70 manifold.
The crankshaft utilizes 2 tungsten counterweights. We have actually enhanced the mass balance by reviewing the comprehensive dimensions.
The inner head has been revised. Improved low and medium speed sensation and idling performance. An O-ring is likewise used to reduce vibration and improve dust resistance.
The weight of the new external head, compared to previous model has been lowered. Fins of external head has been machined.
Geared up with 5 scavenging ports and 3 exhaust ports to satisfy IFMAR guidelines.
Geared up with a double-adjust type 22E(B) GT carburetor. The new venturi is 7.0MM(RED) AL2.
COMBOSET features TB01 EFRA2042 (T-2060SC) + MB01-70 (M2003SC).
TLR-1230
