Oh well after replacing coils, leads, carby, exhaust system, petcock, oils, brake pads, seat, shocks, points cover the engine problem still exists. I know some of them have nothing to do with the issue, just thought i'd throw them in. Compression is fine and leak down test showed up good as well. I have been told there is nothing wrong with the bike electrically either.

The next check they said to was with timing and chains or something? If it's a cog out then that could explain the flattening out of power as you can see by the dyno picture attached.

Waddaya reckon?

What did the AFR curve look like ?

That's all I got unfortunately...

First: Find engine rebuilder and what parts went into it, eg: stock 88", 95" pistons, stock heads, Quick Fix ????
Second: Is it getting enough air, Power Tube fitted, what filter, do heads need working ???
Getting hot, big bores, extra fuel, not enough air ???
Love these problems, plenty to think about ......

??? has anyone checked the valve clearances ? could be a little tight and causing the valves to open as it heats up .... maybe ????

just whack this in,

http://cgi.ebay.com.au/Harley-Davidson-96-cubic-inch-motor-/260740029551?pt=AU_Motorcycle_Parts_Accessories&hash=item3cb5511c6f