|C. Capacity :||3,49 cc|
|Bore :||16,26 mm|
|Stroke :||16,80 mm|
|Crankshaft :||ø 14 mm|
|Carburetor :||ø 8 mm + reducer|
|Glow Plugs :||Normal|
|Weight :||385 gr|
The Eagle 21 B-7N Black version has endowed in crankcase at any point comparable to other FX Engine. The quality of crankcase has been revised for a crankshaft ø14mm and provide the Eagle 21 B-7N Black a very high level of performance. The rear cover has been redesigned to reduce the dead volume of the bottom crankcase. The lowest volume increases crankcase depression and increases the speed of gas.
This Black crankcase is, as on all crankcases modified JP Racing, the label of the JP brand and its identity since 20 years.
WARNING : Place the piston on the top dead center (PMS) before removing the rear cover.
The cylinder head of Eagle 21 B-7N is endowed with 9 cooling ribs. Its shape and size are designed for optimum cooling and its getting down the center of gravity of the engine.
The insert fixed on this engine is a "Normal" type.
The Standard glow-plug used with this insert allows an easy tuning of the engine.
This 7 ports sleeve is revolutionary in the Off-Road engine’s range. The exhaust has two boosters in order to increase performances and to manage better fuel consumption.The conrod is R7 type is the last generation conrod is lightened with 2 bushings. The casted piston is also drilled to decrease the piston temp.
Every piston sleeve set are fine tuned for optimum timing and better gas flow compared to Stock version. Each piston and sleeve manualluy fixed to check optimum tightening and best compression.
The crankshaft of the Eagle is handled completely HardBlack and machined to have a very light weight, more acceleration at low speed and stop consumption. The HardBlack coating on crankshaft avoids the problems of dust setting. Like all the Eagle line, the crankshaft is HardBlack coated, a red putty, used for over 20 years on JP Racing engines, is placed in designed hole of the crankshaft to improve gas flow.
Like the piston sleeve set, each shaft is fine tuned for optimum timing and better gas flow compared to Stock version.
WARNING: Do not put the shaft inside solvent or gasoline for cleaning.
This liquides are able to damage the red dough.
The special Off-Road carburetor uses a plastic body to prevent the «vapor-lock». This carburetor is coming with an 8mm reducer (red) its also available in different sizes. As on all JP Engines the idle setting is limited on a single screw to adjust even easier and user friendly. This carburetor has already proved its worth and confer with this engine a great stability setting and excellent performance.