Mainly, this is due to the advantages of a reed-controlled engine: The phenomenon of “spit-back” is eliminated. Therefore, the fuel-air ratio is not influenced and the carburettor is easier to tune.
In addition, the intake can be designed more streamlined and efficiently. However, this does not mean increasing the intake’s diameter as much as possible. The flow of fuel is ideal in the MB manifold. Streaming resistance is very low and there are no dead spaces slowing down the flow. Furthermore, the steep angle facilitates the flowing of fuel. The well-worked cast manifold with a bgm reed block in the RD350’s style has thick walls and a large sealing surface which creates a lot of freedom concerning intake design. It is not necessary to weld open the engine case on the clutch’s side.
The manifold’s opening towards the crankcase harmonises perfectly with 28 or 30 mm carburettors. Moreover, the casing should be machined, so that there is a perfect transition from intake system to engine, improving the fuel’s flow. Still, the following rule applies: less is more!
Conclusion: The MB intake manifold is a smart choice for well-constructed reed intakes, plus it’s the first choice for efficient street engines!
The kit comes with a 34 mm carb rubber and therefore fits to the following carburettors:
- bgm PWK 24, 28 & 30
- PHBH 28 & 30
- Koso PWK 28, 30 & 32
- Keihin PWK 28
- Mikuni TM 27 & 30
- Dellorto VHST 24, 26 & 28