When building a bike, or anything for that matter, have a plan. ‘While you’re in there’ becomes a very slippery slope. ‘Future-proofing’ always ends up costing ten times more than you thought it would. As the shakedown track day approaches, I was going over some last-minute checks on the Ducati. I noticed a little wet spot on my brand new front tire. Tracing the little dribble line it appears to be coming from the coolant reservoir.
The 916-998 radiator does not have a pressure cap, instead, there’s a hose that runs to a plastic bottle with a pressure cap tucked away in the frame just behind the headstock. They’re very prone to cracking at the seams with repeated heat cycling and leaking. Stock used replacements are $30-50 but are almost guaranteed to fail without warning at some point. Luckily the aftermarket has stepped up and offered solutions. There’s a nice aluminum tig welded reservoir for approximately $225.
Then I came to learn this reservoir like the stock ones, prohibits the use of the Ducati Corse style larger airboxes that are common upgrades for these machines. I hadn’t planned on getting a fancy $1000 airbox, but you never know. No sense in ruling out that possibility now. EVR, who makes the Corse airbox, also makes carbon pressurized reservoir replacements at approximately the same cost.
So I searched for a better solution. Ditch the stupid capless radiator altogether. When Ducati transitioned to the 999 in 2003, they used a radiator with pressurizer cap. Presumably, this was done to remove the old-style coolant reservoir to fit bigger airboxes to make more horsepower. Ducati 999 radiators are $50-$100 on eBay. The inlet and outlets are almost identical.