Kit 86cc high engine Ø50mm TOP PERFORMANCES cast iron special racing 44mm DERBI euro 3 & 4

Not approved on open roads, only reserved for competition on circuits, closed roads.

A new product from the major brand TOP PERFORMANCES and finally available here, the competition had better watch out. This ultra complete 86cc high engine mounts on mécaboite DERBI euro 3 and euro 4 engine, it is the high engine used for the 86cc racing pack ( 9934270 ). This set will give you all the power you need to stand out in competition and win first place. To be accompanied by the TOP PERFORMANCES crankshaft ( 9930210 ) with reinforced bearings . When combined with the 44mm stroke, the actual displacement is 86cc .

Cast iron kit with 5 intake transfers, large oval exhaust, two-part stud cylinder head for good cooling. Everything is machined to perfection according to the rules of the art.

In addition, the cooling has also been completely reviewed and corrected in order to offer the best possible heat exchange and at the same time obtain a significant performance gain, in fact the less an engine runs out of steam and heats up and the higher the performance. remain present. To accompany this cylinder, a competition stud cylinder head! Top-of-the-range model, specially designed to offer maximum compression. The cylinder head stud is mounted on an O-ring, the combustion chamber is hemispherical in shape and has a very good finish, smooth and clean.

The Ø50mm piston is not chosen at random, it is a single segment model from TOP PERFORMANCES . It is complete, delivered with its fine chrome domed segment, its C clips and its piston pin. Very good quality. High quality treated alloy. We recommend changing it every 7000km on this model (except for the most angry handlers who will have to change it every 4500km).

Clearly, this 86cc Ø50mm racing kit for your DERBI euro 3 and 4 engine will be a major asset to offer you assured victories and guaranteed sensations! Delivered complete as presented, you can trust the photographs, they are contractual as usual.

We recommend that you accompany this pack with at least: carburetion from 24 minimum to 28 for the best, a flexible assembly admission kit, ultra-reinforced crankshaft TOP PERFORMANCES Competition 44mm stroke, competition ignition with variable advance, NGK cold spark plug B105EGV, racing engine oil required, large volume racing trigger exhaust essential... .

Contains:

-Complete piston Ø 50mm 9927010

-Set of segments Ø 50mm 9924150

- Piston pin + stop rings 9924250

-Cylinder head 9934280

-Gasket set 9930240

-Water connection on the cylinder head 9928090

-Cap/Water connection on the cylinder 9930270

As an option we offer you a stage 1 preparation, this preparation is a modification of the channels and the exhaust port by increasing the diagrams and improving the conduit, it increases the performance of the cylinder. An improvement to the piston and skirt bottoms is also included in this modification. Allow a little extra time for this preparation!