It's easier to just copy/paste what I just put up on YDR:
<snip>yesterday (Sunday, 4/30) I finally found some time to get into the shop and start finishing up the Dez. I'd decided that, even though the airbox wasn't finished, it was time to see if the RX1 was going to fire up.
Final stuff was done - lines hose clamped, fluids inserted, wire harnesses checked. All seemed in order. Time to give it a try and see if the engine was going to come to life.
Turn the key, lights on the dash blink, fuel pump starts up and it's time to hit the magic button. The engine cranks over nice and quickly and there's the sound of an engine sort of trying to do something - pop, pop, pop. Little blue flames are coming out of the throttle bodies in no particular order. Hmm...
Unfortunately, I was constrained by time and I had to quit early - plus the battery was on the weak side - it's been sitting for the past four months: time for a charge. I'll try tomorrow.
Last night, laying there in bed it struck me. The engine was firing, but not correctly - as if the spark timing was off a bit. Aha! I know the problem! The RX1 engine is a reverse cylinder setup - the intake is on the front side, the exhaust is on the rear. Bikes are just the opposite. My wire harness for the ignition coils was on backwards! Cylinder 1 on a bike is Cylinder 4 on the sled. TADA!!
This morning I headed down and swapped the plugs around: 1 to 4, 2 to 3. Walked back up to the driver's area, turned the key and hit the magic button.
Here are the results!!! <---- Windblows Media File
The rattling sound you hear at the beginning of the video is a wrench, a pair of pliers and half a dozen Dzus fasteners floating around on the aluminum belly pan. Had me worried at first, but once I picked everything up, well, you hear the results.
The engine revs instantly. The primary clutch isn't installed at the moment, so there's no mass on the crankshaft. Nothing to slow down the rev up or rev down. The engine's also quite lean off the bottom end (why it's sluggish on response and back fires). I'm sure this has multiple factors effecting it. Broken air pressure sensor on the throttle body assembly, no air filters or velocity stacks, non-stock exhaust. I didn't have the Power Commander hooked up yet either, so there's not any way to adjust this out yet. - that's an easy fix, though - two quick plug ins and play with the buttons.
Right now I'm going to get back down to the shop and start working on finishing it up. It's time to get this beastie running and in the dirt again - Summer's on the way and there's a race in Mexico on June 17th. I plan on being there!