Airbox crankcase vent – Mk2

Aprilia Caponord ETV1000 Rally-Raid engine crankcase vent pipe to airbox and throttle body

With the velocity stacks and snorkel measured up and squirreled away in CAD, it was time to rebuild the airbox …… except billy-butter-fingers here, went and knocked the airbox base off a chair onto the floor – not far – but enough for it to land awkward and break the spigot for the crankcase vent. Unfortunately the spare I’d made, I gave away to a friend last year! So there I am trying to remember where I’d bought the bits to make Aprilia Caponord ETV1000 Rally-Raid engine crankcase vent flow analysisanother one, when I had a “Stop the bus!” moment …… don’t waste time and fuel going into town, sit down, draw something in CAD and print that puppy! 😀 

Here’s the finished article …. it has a slightly larger inlet/outlet cross-section, although the previous one worked just fine and this time the fit for the grey pipe is better. internally there is a chamber to help reduce gas flow and (hopefully) convince some of the oil to condense and run back down into the crankcase, not out into the airbox. That’s the theory anyway, but it’ll probably turn out to be complete bollocks! Either way, it looks neater so that’s a positive step forward ……. now, what else can I break today! 😀

Aprilia Caponord ETV1000 Rallyb-Raid engine crankcase airbox vent 3D print

The MK1 vent did well and lasted almost  2 years (37K miles) and in that time I never had a moments issue with oil in the airbox going where it shouldn’t. Let’s hope this one does as well!

 

This entry was posted in Engine and tagged , , , , , , , , , , , . Bookmark the permalink.