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Cylinder Head MALOSSI MMW Race

135cc by MMW for DR 135 for
Vespa P80X/PX80 E/Lusso/PX100E
Ø 60 mm, stroke 48mm, short
thread, squish band 1,1 mm,

MMW have reworked the MALOSSI 166cc cylinder head to deliver ideal conditions suited to each cylinder upon which it is mounted. The angle and width of the squish band along with the shape of the combustion chamber are adapted and adjusted to the requirement of each racing cylinder for which they are required. This results in a new cylinder head layout that promises more power, reduced pinking and increased reliability.


MMWs latest version of this cylinder head conversion was conceived for use with the DR 135cc racing cylinder. The higher compression that these MALOSSI 166cc conversions provide ensures a noticeably stronger motor than the original cylinder head. They are meant for use with 41mm stroke set ups and are available as a 'Sport' or 'Race' type. The MMW 'Race' includes a 1mm cylinder base spacer, to give the port timing an extra boost. The ignition should be set at 18 – 19° before TDC for both versions.

Conclusion: Thanks to MMW tuning 135cc motors have been made even more effective and enduring


Aluminium / 60mm bore / Short thread spark plug

Aluminium cylinder head, massive construction, 60mm bore, Short thread spark plug, 11.5 : 1 compression, Squish band 1.1mm, incl.'o' ring gasket.


SIP-TIP : Do not forget to order a new spark plug and a set of high-end MJ 9 cylinder mounting studs! A set of carburettor jets (part no 40260000) become essential when fitting new cylinder parts

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Spare Parts
icon scootermodels This product fits the following models
divider Producer/Model divider cc divider Type divider Engine divider Yr. of Const. divider Extra
VESPA P80 / P80 E (Frankreich) 80 V8A1T 2T AC `80-`84
VESPA P80X/PX80 E 80 V8X1T 2T AC `81-`83
VESPA PX 80 E Lusso/ EFL/ Arcobaleno / Elestart 80 V8X1T 2T AC `83-`90
VESPA PX100 E 100 VIX1T 2T AC `83-`84

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