Have put vance and hince powershot slipons on, vance and hince fuelpac and k&n high flow air filter.The bike when warm sometimes stalls when idling what can i do. thanks

Are you sure it's not the idle air valve as they can sound louder after changing to a high flow filter...take the filter off and shine a light in the intake when turning the ignition on and off. The idle valve is just inside the intake in a hole at the top...see if it moves in time with the noise that you hear

It sounds like your Fuel Pump is failing once it get warm.

I have a 2007 Honda Shadow Sabre VT1100 and I also put after market pipes on it from Vance and Hines. I also have to keep it choked when first starting and sometimes even hold the throttle a bit while it warms up. The bike has two carburetors and the best solution I have found by lots of asking around of mechanics and bike folk is to get it rejetted through Dyno Jet. It is meant for bikes with after market exhausts and much less back pressure from the lack of those stiffling baffles in the stock pipes. I have also noticed the power loss in the middle torque range and backfiring because of the bike running in a lean condition. The Dyno Jet website is a good place to find the correct set and corresponding part number, but then I suggest finding a cheap place online so you avoid retail price :) Hope this helps. Oh, and don't forget to buy two kits...we have two carburators in our bikes.

Lots of problems with the air flow meters

you should map the bike and put a hi flow air filter kit on to give it even air fuel flow.for the map get a V/H fuelpak

did you doing the fuelpak settings yourself?
go over the settings list and be sure you have the proper input values ie...stock or high flow air filter.... stcok headers or true duals and which style of V&H pipes you are using.
If you don't have the sheets with the values go to the V&H website and you can enter your data there and download the proper settings
hope that helps

Settings ?? TFI .. I have same bike K&N ac wild pigs 2 1/4 bafle dealer down load my settings 2.5 ..3..4.... I hear burbling not backfiring .. I have welded a splitter at end of baffle ..

general rule of thumb is to go up about 10 jet sizes,unfortunately it is a bit of trial and error,and you may have to swap out diferrent sizes to get the bike running right,(jets are quite cheap though)but first step about 10 sizes from standard,your local dealer should be able to tell you what jets are in it and supply replacements,if you change to a hgh flow aftermarket air filter you may have to change jet sizes again as changing the filter may effect the mixture ratio in the carbs,,hope this helps

Let me know via [email protected] if you get a solution, Mine is doing similar but mine is holding back at half throttle to, Wont rev high at all just chokes under load

check your primary coil if it is ok the problem is your cdi unit try to replaced it with good one.