Have a 2000 rk: Harley stage II, 95cu, 203 cams, true duals with thunder header muffs, air filter, etc.....

Currently running power commander tune 378 which has my identical mods.

At idle my exhaust is very hot, burned the crap out of the back of my leg on the rear pipe heat shield. Going to header wrap under heat shields.

Cruising than closing throttle to stop I get lots of popping and occasional backfire.

Power during wide open throttle feels incredible, very happy with the power compared to my evo powered egc with stage I mods. Friend was following after a wot blast and was smelling raw fuel from my bike

Other than heat at idle, decel popping the bike runs fantastic and gets a solid 42 mpg on the highway at 70 mph.

I know a dyno tune is the ideal way to tune it, but after my recent purchase it is not in the cards right now. (paid cash on the bike)

Any tuners with some ideas or want to make changes to my map?

 

I have similar symptoms on my '04 Heritage. 95" stage 1 ac, andrews 26 cams, true duals with rush 1.75" mufflers. I get decel popping and get some raw gas smell at times. No real backfiring. Can anyone help us?

 

jurob

Try this: In the 0% column from 1250 rpm to 6000 rpm put in - 10 to cut off fuel at deceleration.

On the ignition table: at 0% from 2500 to 5700 put in 5 to increase timing to help burn off fuel.

I will assume the rear cylinder is running hot.

Promote the map to advance you will then have a map for the rear and front cylinder. With the PC3 connected to your computer use the cylinder offset to add fuel to the rear cylinder by 3%. Remember that the rear cylinder is the number one cylinder.

Also remove that added fuel in the 0% 500 & 1000 rpm if it is idling below 1000 rpm the map is adding fuel.

shineybike

Yours is a Delphi system and is a little different. You will need to add fuel in the 0% column to reduce popping. Try 5. Adding timing will also help and the added fuel will help richen the mixture so the fuel will burn in the cylinder and not the muffler.

The best method is to have a dyno tune where each cylinder is tuned separately.

 

ajayrk,
Appreciate the help. I'll give it a try.

So my m&m system is opposite the Delphi system? I was expecting a lean condition at decel and was going to add 20-25 to start at closed throttle.