JX21-B07 Pre-Lapping Engine [JX21B07/PL]

Product description ※Please note that product information is not in full comprehensive meaning because of the machine translation.

Product Description ■ JX21-B07 New Off-Road Engine!
As a new power source of the 1/8 GP Buggy, we are going to release the JX21-B07, the 7th edition of the JX21 Ninja Engine Series.
We are going to release the JX21-B06 as the new power source of the 1/8 GP Buggy.
The performance and driving feel have been combined with the performance inherited from the B0 or earlier models.
The square stroke of 16.4mmx16.4 mm has not changed. The case, carburetor and rear cover have been changed to match it and the PC has been changed to improve the rotational output characteristics without waste and the fuel efficiency characteristics have been improved.
Engine main specifications
Stroke volume : 3.49 cc
Bore : 16.4 mm
Stroke : 16.4 mm
Port : Scavenging 3 Exhaust 1
Plug : Conical
Crankshaft diameter : φ 14 mm
Carburetor : Double Adjust
Reducer : φ 6.5 mm
Crankshaft : One balance weight is embedded and potting process is applied. Friction loss is reduced with the DLC coating process.
Crankcase : Boost bypass process is adopted for the crankcase.
Rear cover : Thrust plate is adopted to reduce friction loss and improve engine life.
Cooling head : 2 colors of silver alumite and black alumite, has been changed to a lightweight type. Cooling hole processing has been applied to improve the weight reduction and cooling effect.
Underhead : O-ring is sandwiched between the underhead and the crankcase, taking into consideration dust prevention and vibration. It is a conical plug specification with a head gasket of 0.1mm/0.15 mm (standard JX17P3 plug).
Front bearing : Bearing with rubber seal is used to prevent dust from entering.
Rear bearing : Bearing with steel ball has excellent cost performance.
Carburetor : Reducer comes with Φ 6.5 mm.