malossi variator + dr pulley sliders
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VESPA GTS 300SUPERSPORT
Joined: 26 Apr 2020
Posts: 2
Location: GREECE
Sun Apr 26, 2020 4:36 am quote
Hi i own a Vespa gts 300 super. I have an akrapovic sxhaust and Malossi Variator, Recentrly i have replaced malossi sliders with dr pulley 15g (weight)

It seema to be faster in acceleration, but so far i did not have the chance to drive out the city in a highway to check final spped.

Before this change i had 135-140 km/h top speed (depending weather)

I am not sure if the sliders weight is the correct, what i an looking for is top speed

Any suggestion how to play with sliders in order to gain some top speed km?
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Granturismo 218
Joined: 04 Feb 2013
Posts: 6137
Location: NWAOK
Sun Apr 26, 2020 8:12 am quote
Try different ones and see which ones make the bike faster where you live and ride. There is no correct size for all conditions.
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VESPA GTS 300SUPERSPORT
Joined: 26 Apr 2020
Posts: 2
Location: GREECE
Sun Apr 26, 2020 9:18 am quote
Motovista wrote:
Try different ones and see which ones make the bike faster where you live and ride. There is no correct size for all conditions.
Heavier or lighter at least any idea?? I am willing to go lighter .. thanx anyway
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'15 Blue GTS300 Super, '18 White GTS300 Super
Joined: 01 Nov 2005
Posts: 2704
Location: Sydney, Australia
Sun Apr 26, 2020 2:02 pm quote
When I installed Dr.Pulley sliders in my Polini variator I immediately got belt rubbing and destroyed the crankcase gasket below the variator. The combination made the belt ride too high in the variator. So check your setup for any signs of rubbing. You might need a fatter washer in the variator.

Mike
Molto Verboso
S 190. Custom VNB 150
Joined: 04 May 2009
Posts: 1468
Location: CT
Sun Apr 26, 2020 6:23 pm quote
What worked best for me was same weight as stock with the dr pulley. Make sure they are in the right way or you can break things.
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Granturismo 218
Joined: 04 Feb 2013
Posts: 6137
Location: NWAOK
Mon Apr 27, 2020 7:26 am quote
Mike Holland wrote:
When I installed Dr.Pulley sliders in my Polini variator I immediately got belt rubbing and destroyed the crankcase gasket below the variator. The combination made the belt ride too high in the variator. So check your setup for any signs of rubbing. You might need a fatter washer in the variator.

Mike
That's when you need a heavier contra spring, to keep the variator from pushing the belt that high in the front.
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