In his Pandemonium shop located in Defiance, Ohio Daniel Donley customizes both Metric and American motorcycles and fabricate in-house quite a few interesting parts looking like nothing else I have seen before.
Example, this very cool looking Speed Cap Assembly made of 304l stainless steel. This is a NON-Vented cap, so gas tank needs to be vented internally. Can be used on any gas tank and if you can’t or don’t want to do it, send yours to Daniel Donley who will professionally weld it on for you ID opening is 1 1/2″, total height is also 1 1/2″ and sealing is via a Teflon gasket. $50 (speed cap only) Call Daniel Donley on my behalf at 419-576-6812 or visit Pandemonium.