As a lifelong state licensed plumber that spent his whole life installing and repairing steam and hot water systems I can tell you professionally that a water heater is the very most in-efficient way to heat a building using your radiant heating system. The efficiency rating is a small percent of what a boiler is made for that purpose. But water heaters are cheaper than boilers------just so you know.
KTM EXC 450 2006
Husqvarna TR650 Terra 2013
KTM 690 Enduro 2014
If your bike weighs more than 400lbs. You might not make it.