Modern Vespa

Hi Everyone,
My Vespa GTS300 70th Anniversary is currently on ebay, im looking to replace it with a P Range vespa. My friend has a SIP rear disc brake conversion and im thinking of doing the same. Just a couple of questions on that really.

1) how hard is it to change the rear wheel with one fitted. What extra work does it mean to fixing a quick puncture
2) what brake fluid would you put in it? The same as the front?

Sorry if these sound stupid. Thanks

Which one?

The one that requires engine modification, tire removal is normal.

The one that's sorta plug and play requires disc and caliper removal before getting at the tire.

The one with the GTS wheel requires removal of the center bolts to get the wheel off.

The true question is why? Cost vs return is minimal and the front brakes do most of the stopping. Disc upfront is the normal way to go to improve breaking power.

I bought SIPs left side disc brake conversion back around 2005. The absolutely only reason i bought one was because i was building a P200 street racer and i wanted "the look". The rear disc brake performed no better than any of my scooter's standard rear drum brakes (maybe even worse?). I also raced a different P200 for 4 seasons on the race track. I never needed any sort of additional rear brake modification done to my stock rear drum brake to make it perform any better. For a road going vintage scooter, i would never, ever, ever want the additional maintenance that a rear disc would require. The left hand disc version is a pain in the butt to do any maintenance on. It has to be removed to change a tire. It's totally not worth it...UNLESS you want the street racer look. Spend the money on a front disc brake conversion instead. If the P already has a disc brake, then spent that money on fuel instead. Pour in some DOT 3, 4, or 5.1 fluid (same fluid as the front) and your off to stop.


Here's a link to the rear disc brake on my 1958 Allstate. The disc brake kit has been sitting on my shelf for years and years so i decided to reinstall it on something... 1958 VB1 200 Wideframe scuttle bucket (Page 2)