Novarossi BONITO.21-7XLB 7 Port .21 Off Road Engine w/Ceramic Rear Bearing (Turbo)

[NVRBONITO21-7XLB]
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This is the Novarossi BONITO.21-7XLB 7 Port Competition .21 Off Road Engine. Based on the Toro-Nero engine, Novarossi found room for improvement through a variety of subtle changes and developed the BONITO.21-7XLB. The Bonito features the redesigned 'Lighter & Lower Evo2' type cooling head that lowers the center of gravity of the engine and chassis, as well as improving cooling efficiency. Revised porting provides more linear bottom end power than the Toro with the same incredible top end delivery, while the piston design features Novarossi's 'Compact Combustion Technology', providing increased efficiency. The crank spins on a high quality ceramic rear bearing that was selected for improved performance and lifespan, while the backplate has been updated with a steel insert for reduced conrod friction and extended conrod life.

Features:

  • Cooling Head: The 'Lighter & Lower evolution 2' type cooling head has been drilled and milled out to reduce the mass of the cooling head, reducing the Center of Gravity of the engine/car.
  • Piston: The material of this piston has been chosen for its excellent strength to weight properties. The shape of the top of the piston features Novarossi's 'Compact Combustion Technology' which improves the efficiency of the engine. This piston is also milled from a single block which further increases the strength.
  • Conrod: The R7 conrod is made from a super light aluminum which has been ultrasonically tested. The shape of the R7 rod reduces turbulence inside the engine while running.
  • Sleeve: The sleeve has 7 transfer ports and an exhaust with booster ports. The special shape and positioning of the ports, covered by a patent, improves the internal fluid-dynamics to obtain maximum performance.
  • Rear Cover: The rear cover optimizes the case volume and reduces dead space. The steel plate reduces friction and extends the lifespan of the conrod.
  • Crankshaft: The crankshaft has a special shape to reduce turbulence inside the crankcase. The front part was extended to improve the seal and help to reduce fuel leaking.
  • Rear Ball Bearing: The rear ball bearing has high quality ceramic balls to minimize wear and inertia to improve acceleration and fuel consumption.
  • Carburetor: The carburetor is made from plastic, in "reverse" style and has a sliding throttle valve.
  • Combustion Chamber: The combustion chamber is supported by an O-Ring which is placed between the combustion chamber and the crankcase to reduce the vibrations of the combustion chamber.
  • Glowplug: The glowplug of engine is a Turbo type glowplug. Turbo glowplugs have a different shape than Standard glowplugs and therefor are not interchangeable able with engines that use Standard glowplugs!

Recommended Tuned Pipes: EFRA 3005, EFRA 9901, EFRA 9853
Recommended Tuned Manifolds: 41021, 41029, 41030

Specifications:
Displacement:
3.49cc.
Max. Power: 2.97 HP @ 36,300 RPM
Practical Range: 6,000 ~ 40,700 RPM
Bore x Stroke: 15.88mm x 17.60mm
Transfer Ports: 7
Ball Bearings Front: Steel
Ball Bearings Rear: Ceramic
Crankshaft Type: 14.5mm - Turbo SG
Carburetor Type: 9mm Slide w/6.5mm Insert
Carburetor Material: Plastic
Adjustment: Single
Glowplug Type: Turbo - C6TGC
Exhaust Position: Rear
Fuel Type: Advise; 25% Nitro

This product was added to our catalog on March 2, 2011.

Derek Johnson
Wednesday, Jan 9 2013 (about 2 years ago)
Novarossi BONITO.21-7XLB 7 Port .21 Off Road Engine w/Ceramic Rear Bearing (Turbo)
This motor is hands down the best truggy motor on the market no need to mod send to houstons engine service and have him fill the crank and out pull clock works modded roma .25's all day long
martin lenneville
Verified Owner
Sunday, Sep 9 2012 (about 2 years ago)
Novarossi BONITO.21-7XLB 7 Port .21 Off Road Engine w/Ceramic Rear Bearing (Turbo)
wow super engine!! has great compression and is perfect in my truggy .... good run time and very stable for adjustments
conald koontz
Verified Owner
Monday, Sep 9 2013 (about a year ago)
Novarossi BONITO.21-7XLB 7 Port .21 Off Road Engine w/Ceramic Rear Bearing (Turbo)
I got this bad boy,let me tell u this..am just get in the racing game,and the track I go to is hot with Novarossie Engins.this is one of the best engine.this is my first engine..let me tell U guy this, when I first stard gone to the track I go to the guys was like MAN you aint palying.So I saide HEY U GO TO BE IN TO WIN IT..also if U or wonderin what R.C. I got .I have the KYOSHO MP9 TKI 3.I LOVE IT.
Mats Evensen
Sunday, Jun 16 2013 (about 2 years ago)
Novarossi BONITO.21-7XLB 7 Port .21 Off Road Engine w/Ceramic Rear Bearing (Turbo)
Deffinetly one of the fastest and meanest .21 engines out there. I use this often in my buggies, since i like to drive aggressive. The engine holds it's tune very well, even the stock tuning/setting is great. 10 min + pr tank. Its a screamer why Novarossi discontinued this engine is a mysteri for me. If you look for a fast engine and then i mean fast, this is THE ENGINE, and it delivers so much power that its jawdropping. Novas and RB's, Greatest mills out there
raul ortiz
Wednesday, Mar 20 2013 (about 2 years ago)
Novarossi BONITO.21-7XLB 7 Port .21 Off Road Engine w/Ceramic Rear Bearing (Turbo)
excelente motor muy rápido consume poco perfecto para competencias!!!!
MAXIMO VIRGILIO RODRIGUEZ AGUIRRE
Verified Owner
Wednesday, Dec 26 2012 (about 2 years ago)
Novarossi BONITO.21-7XLB 7 Port .21 Off Road Engine w/Ceramic Rear Bearing (Turbo)
El motor no me gusta tiene problemas de calibración, corre 3 minutos y se apaga. No se que tiene, he intentado de todo para que no se apague, desde que lo tengo no llega a consumir un tanque de 125cc.

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