Guy's.....I will say with almost 100% certainty that this bike is legit and came from the factory like that. (minus the chain tension-er)
Scooterboy had a strange bike with that exact culmination of parts ( I sadly had a chance to buy it and didn't) .....right down to the exact clutch cover, with the odd "Slingshot" decal on the top.
The only difference was that is was "Regal Gold" instead of the "Pineapple Flam".
I was gonna post up some pics out of Scooterboys albums but Mark must have removed them.
I have a feeling they did whatever they could to get bikes pushed out the door to meet production needs.