http://item.mobileweb.ebay.com/viewitem ... 1121661151


Looks like stock head and cylinder to me, also has stock carb.

I know the guy selling it.... I don't know anything about the Pilot but I can tell you his prices are typically on the steep side...
Here is the local listing:

1989 HONDA PILOT FL 400 WITH CR 500 CC KIT , IT IS AUTOMATIC WITH ELECTRIC START AND REVERSE, AFTERMARKET EXHAUST AND SILENCER, HIGH FLOW K&N INTAKE KIT, RADIATOR RELOCATION KIT FOR BETTER COOLING, DOUGLAS POLISHED WHEELS WITH AFTERMARKET TIRES,EVERYTHING ELSE ON THIS MACHINE IS OEM AND ORIGINAL, ALL BRAND NEW HONDA OEM FENDERS INSTALLED, OEM HEADLIGHTS AND TAIL LIGHTS, HAS ORIGINAL TOOL KIT AND BLUE ARM STRAPS, THIS MACHINE IS VERY FAST, EVERYTHING WORKS GREAT AND NEEDS NOTHING -IT IS READY TO RIDE !! CALL 508-797-3288

looks like a 400 to me as well. stock carb. stock head. aftermarket pipe. either this guy is trying to pull a fast one, or he is ignorant.

could be a 500 piston in a stock jug???? deffo not a 500 jug...

I thought that too I can't tell if there is a spacer plate under the jug but I wouldn't think you would use a stock carb with a 500 piston.

looks to me like it doesn't have a jug spacer.