Hi, I'm new to Ducati, having just bought a sweet 1990 750 Sport Nuovo. The bike has had some nice period upgrades - 17" wheels, Ohlins rear shock and M1R forks. The only real concern I had with my beautiful new bike was how the front disc setup looked: Solid 280mm rotors on alloy carriers were fitted to the 17" wheels, and a pair of Tokico calipers had been adapted to fit the forklegs. It looked like I should be able to fit bigger discs, and Brembo calipers, but things were not quite as straightforward as I'd hoped - fitting 4 pot Brembo calipers to forklegs originally designed to hold Brembo P8s with 108mm centres would require adapters, and there seemed some confusion (in my brain certainly) about what size discs I could mount. I found a pic of what appeared to be adapters that would allow 300 or 320mm discs to be fitted, and set about acquiring some: I managed to track down a perfect NOS pair of Menani adapters from Loudbike Steve in Canada which would allow me to mount 40mm mounting centre Brembo P4s to my forks: Unfortunately once I got around to dry assembling everything it became clear that the 40mm Brembo caliper adapters I got wouldn't work with the 320mm discs I wanted to fit. It seems that they will allow you to go up 20mm in diameter over what was originally originally fitted by turning them upside down and swapping them side to side (if you get my meaning) but they are unable to span a larger discrepancy. My bike came with solid 280mm rotors and so the biggest discs I could have fitted would be 300mm ones. A look around ebay for second hand 300mm discs left me a bit saddened, as the only used ones I saw were very used indeed, whereas I had already been offered a like-new pair of 320s. New 300mm discs looked unavoidable, but cost was a factor with Brembos coming in at around £400 and EBC still expensive at £300. I was facing up to spending big money on new 300mm discs when I found a drawing for a set of caliper adapters that were designed to fit newer 65mm mounting Brembo 4 pot calipers on to M1R forks with 320mm discs: Local Ducati guru Rich Llewellin of Louigi Moto had some made and put the bike together with 320mm discs and 65mm calipers sourced from his spare parts bin over the next few days. The bigger discs and newer calipers promise even better braking performance, and look the business: Rich is planning to get extra sets of the caliper adapter brackets made for anyone else looking to fit 65mm calipers and 320mm discs to 750 Sport, 750 Paso or 906 Paso forks running with 17" wheels. Anyone interested in getting a pair from him should drop him an email at [email protected]
