Recently bought 2005 road glide with 44K miles,lots of upgrades. The poor guy had back issues so it sat about 1 1/2 years, but kept it garaged and installed new battery before I bought it, it only had about .8 in gas tank and was running, smelled OK so I added a cap of seafoam and 4.2 gallons of premium and it ran great for about 25 miles, started right up with no issues, then coming home it barely ran, made horrible noise in front and started spitting and sputtering, I nursed it back to home about 6 miles as it ran a tad better with no gas throttle but in higher gears, low RPM. Babied it all the way so as not to get stuck somewhere. Checked for codes. no codes found on all checks... any ideas? I thought possibly fouled plugs or? love to get suggestions or solution... Thanks...Glad to have a bike again it was about a year without one....most comfy bike I've ever ridden... Im dying to go for a long ride... Thanks!