SirJakesus, I noticed that my old tank and cap are totally different from the new engine's, and it never had fuel problems. You let me know if you solve this problem and I'll keep you posted too. And no Sir, it's not the roller mismatch, because there is substantial friction loss even with the engines off but pushing against the tires. If I can minimize the friction losses, the bike will go even faster! To get rid of most of the drag, I could rig the front engine lift ala Dimension Edge, then convert the rear friction drive with my gear chain drive. Yeah, that'd do the trick, but I need to enjoy this brand new bike with twin engines first before disassembling it again.
Today I drove to work and it rained. I'm presuming that the twin engines offered excellent traction because very little throttle was needed for low-speed travel. Throttle positions slightly over clutch engagement would be sufficient for many riders. And because of low rpm and alternating engine usage, this combination offers excellent gas mileage. Surprisingly, I might be getting close to the same mpg as I did with the single engine.
So I go home to top off the fuel and ride farther. As usual, the bike's front wheel is up in a tree fork so I can fill the tanks closer to capacity
. I just gotta install an extra remote tank.
Just like before, the new engine quit again, three miles from home. As I stopped and leaned the bike onto a signpost, I look down to see one of my 9/16" nuts on the ground! Double trouble! All but one of the rear motor mounting nuts had vibrated off in the 13-mile trip. My bad, because I probably didn't tighten them. So with two locknuts and zipties, I secured the rear engine. Then I loosened the gas cap, retightened it, pullstarted twice and the new engine came to life! It was getting dark and this was a sure sign to head home, and I was anxious to tackle the medium-sized hill near my place. I got a running start up the hill with both engines blazing, keeping up with traffic in the curb lane. As anticipated, the new engine's rpms were rising, so I released its throttle and used just the rear engine with 1.5" roller. The car in front of me slowed down halfway up the hill, so I braked and kept my distance. When he continued, I throttled both engines but not full-bore, keeping a safe distance from the slow-moving sedan. I'm guessing that the car was traveling maybe 25 mph, and I had to restrain the bike because it was charging like gangbusters up the hilltop!
That second engine is key to great performance. If I can lift the engine off the tire to eliminate friction drag, the bike should be even faster because it'll have less rolling resistance at the top end. When I feel the rear engine's rpm begin to drop, I just floor the front engine until the rear one picks up speed, then slack off the new engine. What an excellent way to add more power, if I say so myself.
Did I mention the sounds of twin engines idling at the stoplight?! Not too loud, but a freaking radical beat!