adventures. I have had it all over the lower 48 and up into Canada, and generally have loved it.
My one complaint is that when I am touring with my buddy on the interstate, especially out west. We cruise at a speed that makes my range significantly less than his.
Running at low speeds the 650 is very fuel efficient, and I out-distance his bike. However, at the speeds of western interstates, mpg drops off precipitously.
I considered just adding rotopaks, which I did, but in the end that still forces me to stop when he is going strong.
I've seen lots of solutions, but none that really solved my issue the way I wanted.
So I plumbed in an aux tank.
I was able to do it without modifying the main tank in any way. I push fuel through the vent tube when running down the road, and when I switch it off everything vents as normal through the charcoal canister. I accomplished this with the solenoid valve next to the fuel pump.
I am sure that some people will have fire risk concerns, but it is all sealed and made from very durable materials that are all fuel rated. Under normal riding, I don't use it, so it is essentially just a 3-gallon blister in the evap system, but on long straight-up rides on 85 mph roads it gives me at total of 8 usable gallons of fuel, and that lets me outdistance my buddy.
I ran the electric through a relay and switch via the Eastern Beaver block, and it really works well. The transfer rate is about 6 gallons per hour, so I turn it on in 10 min intervals to keep the bulk of the fuel in the main tank.
The only downside is that I get questions every time we stop somewhere.