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Discussion Starter · #1 ·

I picked up a 2008 night rod. It came with the toxic big rig pipes on it and it is running lean. At steady state throttle positions in the low map regions it coughs/pops on the back cylinder especially. It is ok when the engine is cold but as it warms up the problem becomes more prevalent. WOT wise it doesn't seem to ping or break up.

I ordered the baffles for them hoping to improve the situation a little.

I just am missing the software, my local dealership doesn't stock it and I am afraid of hurting the bike. It only has 3000 miles on it or so. I pulled the rear cylinders plug and it is on the white side at the tip.

Just for some background info, I have done tuning on LSx series motors using stuff like LS1EDIT and HP tuners.
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