Im 5'8" 180lbs..i dont have a tach so i dont know where the RPM's are

 

Hold the revs up. The oil pump is pumping lots of oil at more rpms,your in motion so it's not overheating the engine. Worst thing you can do to a v-twin is lug it.

 

All HD EFI bikes stumble/hesitate at low rpm due to the EPA mandated lean map.

Get some X14iED's and you will be pleasantly surprised at how much smoother it runs.

 

Get one you'll be happy knowing what rpm your running at. +1 on the fuel enrichment also. about the 2 best purchases you can make for a stock sporty if your gonna keep it stock in my opinion.

 

Can i get some more info on them X14's?

 

Jeff, my 2007 1200C did that gentle surging at low rpm from day one. I live on a dirt/very sandy road and have to ride about a half mile in low gear. The surgin was unsettling where the sand was deep. I called Jamie Long at FuelMoto, explained it was stone stone and he sent me a PCIII that is set up 10% richer than stock across the board. It actually cured more than the surging, it cured the need for more additional throttle to climb a hill than I thought was necessary. It now climbs those hills on 68 in Maryland as if they weren't there. It also eliminated the "hiccup and quit", right after startup. The idle is slightly lumpier than before but I like that. I installed new plugs at 15,000 miles and the old plugs were the perfect color.

 

Click on the link in DK Customs post.

 

Click HERE for more info

What is the best XIED product for my Sportster?

We recommend the X14iED for general use on all Sportsters. This provides the best all around performance.


For Riders that want to experiment with fuel mixtures, the VIED allows a range of fuel mixtures from 14.3 to 13.7:1. This is our recommend alternative to the X14ED. It gives you the chance to try the 14.0:1 and 13.8:1 AFR's, making the final setting based on your riding style.


For Riders with a Bar Hopper riding style (in town), the XiED can be used. Its slightly richer fuel mixture than the X14iED is well suited for in-town riding, but not high RPM, high speed riding.
Contrary to popular belief, richer is not alway better, only richer. For normal cruising in closed loop, there is a diminishing return as the fuel ratio gets richer than 14.2:1. The X14iED is set at 14.0:1 which as proven to be an excellent all around fuel mixture, especially when taking into account the adaptive nature of the HD Delphi ECM.

 

If richer cures the too lean condition, then richer is better if you don't go from too lean to too rich. My spark plugs say mine is spot on.

 

So i had the plugs changed, bought a Vance and Hines fuel pack, had that installed...it still has a low RPM stumble, mostly in 1st gear...it is possable i got some bad fuel?...i also added a bit of seafoam to the tank....im stumped