Made in GermanyEngine case MALOSSI revised by KINGWELLE for crankshafts with 62/64/65 mm stroke
Brand new Malossi engine case
Crankcase diameter spindled out to Ø100mm
Suitable for crankshafts with 62/64/65 mm stroke
Tolerance of the bearing seat of the crankshaft bearing (limaside) corrected from -0.070 mm to -0.045 mm
Recommended bearing for the limo side: NU205 C3
Malossi engine cases are the first choice for building a powerful and reliable engine for Vespa Largeframe models.
CYCLE CASE DIAMETER
If a Kingwelle crankshaft with extra long stroke (up to 65 mm instead of 57 mm standard) is used, it is necessary to increase the diameter of the crankcase in order to be able to mount the crankshafts with their larger cheek diameter.
BEARING SEAT ON ALTERNATORSIDE
In the same step, the bearing seat of the bearing on the alternator side is reworked. Malossi meant a little too well here with the undersize for the bearing fit. As a rule, 7/100 mm undersize leads to a very tight running bearing. Kingwelle reduces the undersize to 0.040-0.045 mm.
RECOMMENDATION NU205 C3
An additional recommendation is the use of a two-piece roller bearing of type NU205 with bearing clearance C3. This makes mounting the engine halves much more convenient than with the one-piece ball bearing supplied by Malossi.
CONCLUSION
The most professional solution for high-displacement high-end engines with Malossi MHR187 or Quattrini 172cc cylinders. This is the perfect base for anyone aiming for performance of well over 30 hp.
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