Main Bearing front, 2nd undersize (M4)
96,50 €

including 19% VAT. ,

Shipping time: 2 - 3 workdays

Main Bearing front, 2nd undersize (M4). Very good aftermarket part, made in Germany by HMB.

All big V2 Models using an oil filter. T3 up to Griso. No V7 models !

850 T3, T4, LM-1, LM-2, 1000-SP, V 1000-G5, Convert, 850 T5, LM-3, Cali-2, Cali-3, Mille GT, SP-2, SP-3, LM-1000, 1000S, Quota 1000, Quota ES, Cali-1100, Cali-1100 i,  Cali-Spezial, Cali-EV, Stone, Jackal, 1100-Sport, 1100 Sport ie, V11,  Daytona, Centauro, Cali Classic, Vintage, Bellagio, Griso, Breva, Norge, 1200 Sport, Stelvio.

info 2nd undersize (M4)
info These bearings are HMB made, using a sturdy, CNC precision made flange. Very much stronger then the cast original part. Only one reason beeing the used material itself, but also the complete bearing is made of one piece of bearing suited aluminium material. The advantages are obvious, no danger of anything loosening and more overall precision. A locking pin is no longer needed.
Tolerances from bearing to housing is also an important, often underrated issue. Many bearings were too small in the past, resulting in "strange" vibrations and in the end, a damaged engine housing. The bearing must have a firm seat in the housing ! As our bearings have correct tolerances, we recommend to heat up the housing before mounting this bearing.
Production tolerances for the shaft bushing have been halved, in comparison to what the factory would allow for an original bearing. This is an important contribution to a stable oil pressure in the engine. This also applies to engines with partly worn crankshafts, as pressure losses are caused by the "gaps" whereever they may occur.


- Correct tolerance from bearing to housing
- Correct angle between housing surface and shaft bushing
- Oil pressure benefits from low tolerance for shaft bushing
- No need for locking pin