will a free flow exhaust lean out the bike

[HapHazard]

Originally Posted by motorat

the bike will start and run fine for about 1/4 mile. then when excellerating it has the feeling of running out of gas.
it really feels like it has a fuel filter that is clogged. when rolling on the throttle it is being choked then on roll off it kind of regains some power then on roll on it looses it. in the shop manual i found 2 filters on on the fuel pump and one on the intake to the injector. i think it might be one of those......neither is easy to get to. i just have to find a shop that will try to locate the problem.

Originally Posted by anotherguy

The excessive heat may have damaged the O2 sensor. Are there provisions for code reading on the Enfield?

It is possible that the bike switches from closed loop (preprogrammed maps) to open loop (O2 sensor and other sensor readings) after the quarter mile. As anotherguy suggests, can you read any codes? Is the shop manual decent? Does it have an EFI troubleshooting section? I wouldn't rule out the filters, either.