Kit 50cc liquid MALOSSI G2 Replica (G2R) aluminum MBK 51 / av10 motobecane


The famous kit MALOSSI G2 REPLICA MBK 51 liquid cooling, solid, torquey and powerful!

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manufacturers : MALOSSI

228,90 € 228.9 tax incl.

Availability: Caution requires a delay of more than 20 days

This product is not in stock but available for purchase (expect delays)

This G2 replica kit is a copy of the true GR2, obviously much slower than the real competition! The real GR2 (G2) competition features a forged piston mono segment, an exhaust with bar, digraphs track ...

This kit is a copy made ​​for the road is solid, the exhaust with bar has been replaced by normal exhaust, exhaust thread is no longer for big ball 38 but banal kneecap, the piston is a model Bi segment chrome domed hard, this bi segment slowed ample high speed and helps the couple, wear is much less intense.

The piston is slightly reopened on the back to encourage scanning. It is identical to G1 replica but liquid cooling, which provides additional security of power and strength and more. The cylinder is made ​​of high-quality aluminum and nykasil Treaty, the bore is 39mm as the origin so it develops a capacity of 50cc, it has 6 transfers and a normal exhaust.

The kit or what is very significant is that it preserves the form of transfers to the base and the ducts of true GR1 and GR2. So transfers increased on the front, this shape really offers maximum performance, you will of course align your housing has this kit. The cylinder head is a model room tour, polished hemispherical, high compression, it is perfectly designed to the cylinder / piston with a ratio of 11.8: 1.

This kit is really very powerful, solid, it shall offer you a very good torque and good enough high speeds, the diagrams are well served. We regret only that there is no more attached to make the squish (you can ask the seals base of G2R / GR2)


Diagrams and technicalities:

Material: aluminum treated nykasil
Scheduled to run: 41,80mm (origin MBK 51)
Diameter: 39mm
Real Capacity: 49,93cc
Piston MALOSSI model lightened with internal cooling fin
Segment 2 hard chrome domed 1.5mm thickness for less friction
Transfers number: 6
Exhaust: normal width 100 °
Volume of 6.5 ml chamber (Long pellet 2.5ml already removed the measures)
Hemispherical room (room Ø29)

Exhaust diagram: 184 °
Side intake chart: 130 ° number 4
Charts rear entrance: 117 ° number 2
Compression ratio: 11.8: 1
Tightening the cylinder head is recommended torque: 1,2kgm
Advance has advised the ignition with electronic Ducati on MBK 51 / av10 motobecane: 1.5mm before TDC
Lapping advised: 250km

View the casing preparation has made:


Preparation Tip: Mount the exhaust timing is 188 ° in order to obtain excellent high speeds. Generally we board an exhaust side difference from 60 to 65 ° and this preparation so you will approach (D: 58 °)! Exhaust opening angle is 100 ° so it is good but upgradable to 105 ° and the form is correct but can also be improved. The base is excellent and very worked, the finish is pretty good! An exhaust polishing cap and piston serras as good.


We recommend at least: carburation 17,5mm minimum, bearings and reinforced crankshaft, exhaust racing, cold candle B9 for running / setting and B10 (especially with the advance of 1.5mm advised by malossi), preparation of crankcases.

The pack contains:

Bi piston segment d.39mm

2 d.39mm segments

Ø13mm piston pin

2 piston clips (axis rushes) C d.13mm

6 cylinder transfers G2 replica 50cc aluminum d.39mm

Cylinder head high compression

Pack complete joint




Spare parts:

Pack cylinder head O-ring

Pack joined other (paper base and cylinder head, exhaust ...)


cylinder and piston without cylinder head

Axis + Clips

2 Ø39 segments by 1,5mm

Cylinder head

Piston clips G

Optional we offer a preparation course 1, this preparation is a modification of the exhaust port by increasing the charts and improvement of the duct, it increases the cylinder performance. Improved bottom skirt is also included in the amendment. Allow a little extra time for this preparation!


View the prepared release:



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