IMPERIUM smallframe. 0 1 2 3 4

New gearbox with "overhead idler" sized to be installed on latest generation crankcases and/or where a larger cluster bearing can be inserted by modifying the housing itself. (pickup op. on right half crankcase).

Cluster keying provides its own trilobal spider compatible with all crimaz clutches and/or with et3 type spider (no pk 6 springs or similar).

The assembly is designed to work with the new 2.0 decomposable sprocket, which compared to the classic one on the market, has the addition of a circlip. (Imperium decomposable bellhousing hub replacement with safety ring cod. DI5017-MOZ I)

Imperium track cod. DI5022-I P
12-14-16-18
49-46-44-42

Imperium bar cod.DI5024-I B
11-14-17-19
49-46-44-42

The same versions are provided for Piaggio crankcase with mini Imperium designation. Change the length of the cluster and the thickness of the fourth vel.

Imperium mini track cod. DI5023-I mini P
12-14-16-18
49-46-44-42 mini

Imperium mini bar cod. DI5025-I mini B
11-14-17-19
49-46-44-42 mini

Starting on request with gear on unidirectional bearing "not recommended for track use" cod.DI5012-AV I

To install the gear on unidirectional bearing, it is necessary to grind the half-moon (toothed sector) by properly removing the initial axial thrust invitation. The toothed sector and the gear will always be gripped.

It may be necessary to lower the thickness of all the teeth of the toothed sector by grinding the side of the half-moon at Z49.

On the tail of the standard bellhousing (all fixed bellhousing) you need to grind the affected diameter to ø19.99.

On the Imperium DI5017-MOZ I decomposable bell hub, on the other hand, it will be a simple p&p.

Pay attention to the mounting direction of the gear on unidirectional bearing. Always simulate starting before closing the engine. The movement of the start pedal should provide movement to the crankshaft. If this does not occur re-couple the gear on the tail by reversing the side.

IMPERIUM cluster bearing REF. 6202 (late model Q. type and/or similar crankcases only).
For machining bearing seat 6202, center on the original seat, enlarge the diameter from ø29.98 to ø34.98 and lengthen the stop by 5 from the original.

The remaining bearing seat collar, will be to remove flush with the new 6202 bearing.

Restoration for original gearbox:
By inserting a ø10xø15 L12 commercial bore bushing to mate with the inner ring of bearing 6202, you will return to height to reuse use the original cluster.

Included:
Set of shims Ø15 0.8-1.0 1.2 1.5 to be interposed between cluster and bell tail (pre-assembly max axial clearance 0.15)
Shim Ø20 1.2 to interpose between starter gear and bell tail towards clutch.