(My posting from another thread)

I changed out my stock mufflers for the sound of S&S MK45's and my bike ran fine, no backfiring or loss of torque. However knowing MOCO "recommends" a tuner icw the install of their SE mufflers, and wanting to reduce the number of "data points" to refuse any future warranty claim, I flashed my ECM with their street tuner. Added one 20 minute auto-tune ride and called it a day.

Bike runs "a little" stronger now up thru accelerating to 5k. My AFR up to 3750rpm is now programmed between 14.5 to 14.3 from the street tuner stage 1 graph so I "know" I'm not running 14.6AFR (or higher) from a stock tune. Since I kept my stock air filter my engine is not "leaned out" from the higher air cfm flow and is running cooler then stock. Did I lose a couple pounds of HP/TQ by not adding a hi-flow...yep. But it is a touring bike and the 80hp/100tq neighborhood works just fine for me and my riding.

regards,

 

And I think that's the most informative, unbiased information on the stage 1 there is. Slip ons and use the tuner. Aircleaner change or SE modification not needed.

 

I picked up a set of new RC 4.0's (for a steal I might add) and installed last night. Sounds much better than stock, nice and low/deep but not loud. They will need time to break in but the little ride I did last night sounded pretty good.

 

I went straight to Stage II (torque). All SE parts were added to the warranty during the first 60 days. The result is noticeably more power and sound than stock. Not earth-shattering, but bike was already powerful, so even more power is nice. And I don’t want too loud. Some of these bikes in town are obnoxious. Mine is now louder and definitely not stock sounding so I think it’s just right. Sorry I can’t say how Stage I alone performs, but I’m glad with the Stage II result.

 

I second this opinion. Same boat exactly. If you aren't tying to beat the 60 day window maybe add the tuner and pipes first. If you decide to add the cam after you will need them anyway...or just do what we did and go Stage 1+2 at the same time. $2150 including tax and labor is not bad for all in cost. A good stage 1 can easily run $1500 or more. Not that big a stretch.

 

I am running VH 4" eliminators. I have heard the RC's and the S&S. They all sound somewhat similar just a subtle variation on tone. None of them are loud. I just went with those the tuner and the K&N in the stock air box. Called it a day at that.

 

I put the RC 4" slash ups on as well as the Harley Hi Flow AC that uses the stock cover on my 2017 SGS. I initially tuned with a SEPST and it ran OK, a little better than before, but not a lot. I bit the bullet and got a FP3 and installed the initial tune for the V&H rounds, then did a couple of auto tunes......MUCH better......

As far as the sound of the RC slip ons, at idle and cruise, they are only slightly louder than stock, but with a deeper tone. Stand on it and the do bark a bit, but not enough to be obnoxious. I have a Biketronics amp and 7.1 speakers and can hear the stereo clearly at 80 mph with only 1/2 to 5-8 volume....

YMMV

Lon