Help with popping
Hi guys. So I went through the Verses and did most of the recommended checks/mods and procedures, spline lube, digital voltmeter, swapped the spark plugs for NGK iridium, etc.
I've done the coaster mod and I'm still getting lots of popping from the right hand pipe.
In the interest of full disclosure, here's what I've done:
Both mufflers were rotten off with no hope of welding or brazing so I got a pair of Sportster mufflers (with baffles intact) and de-goated. I don't have a cross over pipe because over here in Ireland we don't have too many dedicated exhaust shops and most of the ones that are here are fitters (I.e. Instead of fixing they just replace). I've had to wrap the headers solely because the right hand header pipe looked dreadful, chrome rust and no amount of polishing could help so I sanded off all the rust, used rust remedy to cure it and painted with vht paint (good to 800* C).
There is no leak from the connection of the muffler to the header, that's good, tight and sealed up.
I replaced the crush gaskets with the Harley Davidson ones, no leak from there.
As I said, I did the coaster mods and used the gaskets from the reed valves to seal up, they came of clean and I tightened up the bolts good and tight so there is no vacuum leak there. I have the air/fuel mixture screws turned out 2 1/4 turns on the left side and a full 3 turns on the right. The right carb vacuum hose is also sealed up well.
Leaves me with maybe 2 possible culprits:
I did pull all the hoses from the emissions system and didn't plug up the hole under the air box where I pulled the hose from.
I replaced the battery, I stupidly ordered the wrong Yuasa AGM battery online and it was costing me too much to return it so I just swapped it for a standard wet cell battery at my local bike shop. He had no AGM batteries in stock.
Could there be any other reasons why it's popping?
If it is one of the above reasons, why is it only popping from the right side exhaust?
Finally, will the popping damage my engine?
Sorry for the long winded post, I did try all the possible remedies I could find in the forums. I'm at my wits end and could really use your help.