Cycle News

Cycle News 2019 Issue 49 December 49

Cycle News is a weekly magazine that covers all aspects of motorcycling including Supercross, Motocross and MotoGP as well as new motorcycles

Issue link: https://magazine.cyclenews.com/i/1190846

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PIKES PEAK-WINNING APRILIA TUONO 1100 RSV FACTORY R I D E R E V I E W P104 run its street-legal Superbike in the race because the Heavyweight Divi- sion at Pikes Peak caters exclusively for production motorcycles originally delivered with a one-piece handlebar. Otherwise, they're only allowed to run in the Exhibition Prototype class (still with a one-piece handlebar, but not as original equipment from the factory), essentially an open category catering to everything from factory prototypes and home-built specials to super- bike racers. The marketing kudos for manufacturers comes from winning the Heavyweight Division. The Tuono's 1078cc 65-degree V4 engine was left completely stock, but with the addition of an aftermarket Akrapovic titanium exhaust. But after much experimentation the team finally settled on ultra-low overall gearing of 15/54, compared to 15/42 as stock! That's the sort of gearing stunt riders opt for, but Rennie had a good reason for fitting it. "At the tire test we did ear- lier in the month, I was like, this thing is so slow! We knew we had exactly 170 bhp at sea level, but when we got to altitude at 6000 feet, we were at 160 when we first mapped it, and then we had issues with the fuel type during race week. So then when we changed the map with the correct fuel we'd lost about eight bhp more. We actually got back up to 162 bhp by race day, but it was a serious amount of work for the guys to do at the dyno. So, we decid- ed to drop the gearing so that the bot- tom three gears would flash by in an instant, and I'd spent most of my time in the top three gears, except for in the hairpins where it was always bottom (Left) Cathcart gets the good word from team manager Shane Pacillo. (Below right) Scaysbrook charges through the mid-section during practice for the 2019 PPIHC. Gold wheels were swiped off a RSV4 RF from 2014.

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