- The full article was originally published on Reds Racing -
What are the tech specs?
The new 721Pista Gen2 engine features extreme power, high reliability and tuning stability. Combined with specific technical changes such as new carburetor, new cooling head and front bearing, this 7 ports engine features higher power and better fuel efficiency compared to any other engine. The new engine comes with a DLC Coated crankshaft and backplate for improved engine durability and power delivery.
What is new and different?
New 7 Ports Sleeve: New high torque 7 ports sleeve for great torque and power output. Basically, the new exhaust boost design combined with the inlet ports layout ensures an increase in power on the whole RPM range.
New high speed front bearing for increased durability and idle stability
Completely redesigned cooling head: lower gravity center for better car handling, improved aerodynamics for a lower drag and improved engine cooling, new design and colors.
New Carburetor and Venturi: Another big improvement is the brand new carburetor made from pressure die casting. The carburetor has been completely redesigned: new body mold, new internal fluid dynamics, new mid range needle, new high speed needle position.
721Pista engine pro tuned is hand-tuned with a silicone-filled, balanced and tuned crankshaft by M. Rossi. Every single engine is hand inspected and compression checked inside Reds Racing headquarters by Mario and Marco Rossi to achieve the highest quality standards. This is core to the values that makes Reds Racing engines different from any other brand on the market.
We advise to use the new engine with 2113 pipe and M manifold and only with REDS original spare parts and accessories.
Available versions:
ENPS0018 721PISTA GEN2 ENGINE S SERIES 3.5CC ON ROAD – DLC CRANKSHAFT AND BACKPLATE- STEEL BEARING
ENPS0018T 721PISTA GEN2 ENGINE S SERIES 3.5CC ON ROAD – PRO TUNED BY MARIO ROSSI- DLC CRANKSHAFT AND AIRBOOST BACKPLATE – CERAMIC BEARING
ENPS0018B 721PISTA GEN2 ENGINE S SERIES 3.5CC ON ROAD – DLC CRANKSHAFT AND BACKPLATE – STEEL BEARING – PRE BREAK-IN SERVICE
ENPS0018TB 721PISTA GEN2 ENGINE S SERIES 3.5CC ON ROAD – PRO TUNED BY MARIO ROSSI- DLC CRANKSHAFT AND AIRBOOST BACKPLATE – CERAMIC BEARING – PRE BREAK-IN SERVICE
SPECIFICATIONS
Category: 1/8 on-road
Displacement [cm^3]: 3.5
Bore [mm]: 16.04
Stroke [mm] 17.32
Inlet ports: 7
Outlet ports: 3
Crankshaft: balanced with low friction DLC Coating
Backplate: aluminum with low friction DLC Coating
Front ball bearing: 7x19x6 rubber seal made in Japan
Rear ball bearing: 14×25.4×6 Swiss made ceramic
Carburetor diameter [mm]: 9.0 stock (8.0, 8.5 and 9.0 optional)
Carburetor: VCX3-A aluminum (3 needles)
Weight [g]: 333
Recommended Glow plug: REDS TS7 or TS8
Recommended pipe: REDS 2113 + M
Recommended fuel: 16-25% nitro, 8% oil
Break-in fuel: 12% oil
