The SERIE PRO throttle pulley replace the necessary quick action twist grip in the case of large carburettors. The new throttle pulley are designed so that a 34mm carburettor can also be opened with a quarter turn of the throttle grip. At the beginning, the throttle pulleys were also designed for the PX and PK models, however the demand for the old models rose very quickly as even in the case of our "old ladies", the original look plays a large role. Throttle pulleys are now available for the 1960s/1970s large frame models. The throttle pulleys do not fit the Vespa 125 VNA/VNB1-2 models with sheet steering head cover. Here we recommend the use of the universal cable pulley (part no 62090000).
Conclusion: “Twist & go”
Sip Community user "Hansi" (about PART No 13979900):
"No more fiddling around or constant turning of the handle!"
SIP TIP: For all throttle pulley, a dead stop must be individually applied (e.g. via drilling and a M6x10 screw), this is necessary for the zero setting of the throttle grip. You can find installation instructions at www.sip-scootershop.com
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