I recently found out about this mod. There's a technical article about it which i'll briefly introduce here.
So whats this budget mod about? The mod makes it possible to use a Piaggio rear pulley on a minarelli engine. Note, stock minarelli pulleys are 115mm and stock Piaggio pulleys are 128mm. A bigger rear pulley will give you better acceleration from a stand still. A bigger rear pulley creates a bigger ratio in the transmission which makes the motor pull harder.
You'll need the pulley from a so called old version Piaggio motor. Generally speaking Piaggio motors come in two versions, 'old' and 'new' version. Old versions are found on pre 98' scoots like the Piaggio/Puch Sfera, Quartz, Zip RST, Typhoon, NTT, NRG, Vespa ET2. New versions are found on Gilera Runner, Stalker, Piaggio zip (with the single front swingarm, not the telescopic fork) Liberty and every other post 98' Gilera/Piaggio/Vespa scoot.
Just to bump an older thread. I sell a rear pulley that is 122mm in size. Along with a 99mm front pulley that made for a great budget over range that allowed me to keep the stock electric start and gain some topend and quicker 0-30 speeds. A longer belt is of course needed but no modifications for the trans tunnel was necessary.
Here is a 122 mm rear pulley I've been using with great results, plug n play (for the most part), on a Minarelli. I had to do about 30 seconds worth of grinding to get rid of a slight rub on a Yamaha Jog case. Cheap and quality has been great. No complaints.
Senna1Rossi: Thanks renagade281!
May 23, 2016 14:59:12 GMT -5
Fox: I don't really know how to say this but straight. I am Dave's Girlfriend Kellilee and bluntly and VERY SADLY he passed away early Tuesday morning. I know he would want ya all to know this. Thank You Brent for befriending my love he was very happy on here!
Jun 18, 2016 16:26:04 GMT -5
Fox: www.gofundme.com/29mgf6b8 I hope it is ok to pass on his gofundme page link. If not you will un-post it I'm sure. Thanks again all!!
Jun 18, 2016 16:31:18 GMT -5