HI guys & ladies,

1998 fxd
44,000miles

just put this bike back together i rebuilt it after a friend laid it down

acceleration feels smooth, crisp, and quick until i hit around 80mph then i dont have enough power to pass a semi, it just seems to plateau. i can squeeze a little more out of it but not much more than 85 or so.

thanks for your time and help ML&R

 

This can happen if you have a shim under the needle and it gets stuck sideways and jams the needle up from its position in the slide.

Could be blocked air filter, incorrect float height....give it a major service and check all your settings/adjustments are correct and then get back to us.

 

in this rebuild did you happen to add a windscreen maybe

 

Assuming it just runs out of gitty-up but continues to run smoothly I would check for a dragging brake.

Easy enough, just take it around the block and stop without using the brakes, get off bike and check brakes for excessive heat, watch out they could be real hot, also feel the wheel hubs and make sure they are also still cool to the touch.

 

thanks guys, Ill double check the brakes in the AM, no windscreen was added, and ill take a deeper look into the carb this weekend

 

Harleys are over-geared in top, how well does it run in fourth gear?

 

Before you tear the carb apart, make sure the petcock screen is not partially clogged.

 

,,, and try it with the gas cap cracked open to eliminate a vent problem.

 

This gearing calculator for a 96 Ultra may be a little different from your bike, but would be close, keep it in 4th gear longer.

 

That dyna should have no problem pulling past 80 in 4th or 5th, unless its geared up.
Mine would be tached up pretty high in 4th @ 80.