BGM primary wheels are bullet proof. Developed for the enormous power and torque of today's engines, they are made of a high-alloy steel (SCM415 / 15 CrMo 5) to the highest manufacturing standards. The enormously high strength of the base material (up to 1100N/mm2, HRC 58-62) offers a reassuringly safe basis for the production of BGM primary wheels.
The production meets the high level standard for Honda's transmission production. Every single part receives a test report. BGM thus has a permanent continuous quality assurance system.
- Straight toothed for high-torque engines
- High-quality material 15 CrMo 5
- Precise production according to Honda standard
- Continuous quality control
- Useable with all transmissions up to approx. Year of manufacture 1962 (primary spring Ø9mm x 27mm)
- Available with 62 or 63 teeth
- Combinable with straight-toothed BGM Pro coupling pinion for COSA2: 23Z, 24Z, 25Z
- Only mountable with BGM Pro primary repair kit (see accessories)
Characteristic feature of BGM wheels is their black colouring as well as the practical labeling indicating the number of teeth the pinion has.
The straight-toothed BGM primary drive parts are designed for today's very powerful and high-torque engine generations. Their possible reduction ratio is significantly greater than that of their helical counterparts.
The possible combination with the straight-toothed BGM Pro clutch pinions with 23, 24 or 25 teeth covers a transmission ratio range of 2.67-2.48 (orig. PX200 = 2.82)
TIP: On high torque motors, install the harder BGM primary springs directly during assembly (already included in the BGM primary repair kit). These do not go so quickly on block and thus ensure the effective smoothing of load peaks by an always sufficient residual spring travel. In this way the gearbox and the clutch are considerably protected.
NOTE: Only mountable with BGM Pro primary repair kit (see accessories)
BITTE NOTE: The straight-toothed BGM primary pinions and primary wheels cannot be combined with Polini or Malossi parts. The module is chosen differently for the BGM parts for maximum stability.
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