Modern Vespa

Just install Dr Pulley's on my GTS last week, and so far am very happy with the performance gain in acceleration. I used the 11.2 gram weights. How long do these roller weights last, and any wear issues with other parts i.e. belts, variator, etc.?

The reports on the Dr. Pulley sliders have not been numerous on this forum. Lots of approximating, etc. Thanks for the post, and keep us posted.

Please keep up posted! You hear a lot but no confirmations, like they cause the belt to rub against the CVT cover or something like that.

subscribed How much performance gain can you actually feel (%)?

Do you lose any top end and does it adversely affect mpg?

Very interested to read an informative and honest review, please keep us informed.

I've got 9000km on my Dr. Pulleys now, and they've been great.

My first set went in at 10000km, these were 11g SR2117. A good replacement for stock, with a bit more poke. I changed these at 15000km just because I wanted to pfaff around with the weights- there was no abnormal wear on either the belt or the sliders that came out then.

I'm now running 10.5g, a mix of 10g & 11g SR2117, evenly distributed around the variator. Note that these must be installed 10-11-10-11-10-11. Note that the weight is only marked on the tin- not on the slider. I used a whiteboard marker in the groove on top to mark them, so be careful. I find that this combo gives a few more revs at WOT, but not too many- It pulls just under maximum power (somewhere between 7500 & 8250 RPM on the imprecise tacho) at WOT, but is happy to pootle around when I'm more relaxed.

I haven't noticed any decline in economy, that seems more dependant on how I ride than anything else. The only slight tradeoff I have noticed is a slight reduction in engine braking at low speeds, which doesn't bother me too much.

Note that these results are in a stock variator with OEM belts, others have had "mixed" results using these in Polini variators or with Malossi belts. Also be sure to use the correct size- SR2117 for Quasar engines, with a weight close to or just under stock (the above noted being for a 250).

Enjoy!

Thanks for the information and review.

The marketing jargon says they last longer than regular weights, but what does that mean? How much longer?

I also read from one person that belts do not last as long using Dr Pulley weights, but I wanted to hear from others about belt life.

From my short personal experience with Dr Pulley's I do like them over stock. I am still getting used to the way the RPM's quickly rev up to 6000 RPM's from a stop up to about 50 mph and then increase as speed increases. I think the biggest gain in performance is from 10-50 mph. I have not tested performance with speeds beyond 60 mph.