Engine case -MALOSSI VR-One, diaphragm intake, incl. crankshaft King shaft stroke 60mm, connecting rod 110mm for Malossi 210/221 Sport/MHR - Vespa PX200 Elestart | Engine casing | Crankcase | Engines

Preview: Engine case -MALOSSI VR-One, diaphragm intake, incl. crankshaft King shaft stroke 60mm, connecting rod 110mm for Malossi 210/221 Sport/MHR - Vespa PX200 Elestart

Description

Engine case MALOSSI revised by KINGWELLE including Kingwelle crankshafts with 60mm stroke / 110mm conrod (Primatist)

Brand new Malossi engine case
Crankcase diameter spindled out to Ø100mm
Inclusive crankshaft Kingshaft with 60mm stroke
Tolerance of the bearing seat of the crankshaft bearing (limaside) corrected from -0.070mm to -0.045mm
Recommendation bearing for the limaside: NU205 C3

Malossi engine cases are the first choice for building a powerful and reliable engine for the Vespa Largeframe models.
The engine case offered here has the extra sturdy King shaft with 60mm stroke and 110mm Primatist connecting rod.

Thus perfectly suitable for Malossi Sport/MHR 210/221 cylinders.

Crankcase diameter
If a crankshaft from Kingwelle with extra long stroke (up to 65mm instead of 57mm series) is used, it is necessary to enlarge the crankcase in diameter to be able to mount the crankshafts with their larger cheek diameter. This is already done by Kingwelle on the case offered here.

BEARING SEAT LIGHT ENGINE SIDE
In the same step the bearingseat of the light engine side bearing is reworked. Malossi meant it here with the undersize for the bearing fit a little too well. 7/100mm undersize usually leads to a very tight running bearing. Kingwelle reduces the undersize to 0.040-0.045mm. This has also been done on the motor housing offered here.

RECOMMENDATION NU205 C3
An additional recommendation is the use of a two-piece roller bearing of the type NU205 with the bearing clearance C3. This makes the assembly of the engine halves much more comfortable than with the one-piece ball bearing supplied by Malossi. Kingwelle explicitly recommends the use of such a bearing type (see accessories).

CONCLUSION
The most professional solution for large displacement HighEnd engines with Malossi MHR221 or Quattrini M244 cylinders. If you are aiming for performance well above 30hp, this is the perfect base.

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