New pipes & cans...
Ultimate HDF Member
Joined: Oct 2016
Posts: 5,063
Likes: 2,582
From: On my bike!
The Air Cleaner (stock upgrade) kit, SE Tuner, and full Rinehart Dual Slimeline exhaust, then Legend Rev-A shocks are probably as far as I am going to go. The 114 M8 is plenty powerful, and already responds well. Going crazy with cams and up to Stage IV is, for me, not necessary.
Tourer
Joined: Mar 2011
Posts: 280
Likes: 209
From: Laconia, NH
The Air Cleaner (stock upgrade) kit, SE Tuner, and full Rinehart Dual Slimeline exhaust, then Legend Rev-A shocks are probably as far as I am going to go. The 114 M8 is plenty powerful, and already responds well. Going crazy with cams and up to Stage IV is, for me, not necessary.
Outstanding HDF Member
Joined: Dec 2008
Posts: 2,007
Likes: 353
From: Ohio
In general, the cats on newer model bikes are far less restrictive than in the past. I once saw the results of dyno runs on late model SG. One with the cat and another with the cat removed. The results were basically the same. The exhaust velocity was not affected thus no change in scavenging. One reason for that could be that the air intake remained the same for both runs. So, if the intake volume was increased enough there could be a point where the out flow could begin to be restricted by the cat. How much that increase would have to be is for the engine builder engineers to figure out. In the end it appears that given no change in air input, no map change is required. That seems to agree with what many have said in the past.
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Cruiser
Joined: Oct 2021
Posts: 114
Likes: 39
From: Bowie, MD
In general, the cats on newer model bikes are far less restrictive than in the past. I once saw the results of dyno runs on late model SG. One with the cat and another with the cat removed. The results were basically the same. The exhaust velocity was not affected thus no change in scavenging. One reason for that could be that the air intake remained the same for both runs. So, if the intake volume was increased enough there could be a point where the out flow could begin to be restricted by the cat. How much that increase would have to be is for the engine builder engineers to figure out. In the end it appears that given no change in air input, no map change is required. That seems to agree with what many have said in the past.
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Cruiser
Joined: Oct 2021
Posts: 114
Likes: 39
From: Bowie, MD
Well, got the bike from the dealer last week. Would have had it the week before but they had some parts issues that emerged.
I was given the Rinehart 4 1/2" cans with chrome tips, as once I paid for and specified the 4" with chrome ends, and they had the bike, they installed black ends...when I picked it up, and pointed out the discrepancy, they checked, saw the error, had no 4" chromes in stock as they promised, but offered me the 4 1/2" at no extra charge. Gotta say, they are very rumbley and perfect with the bike. I live 25 minutes (12 miles of secondary roads) away from the dealer, but for some reason, it took 3 hours to get home...
I was given the Rinehart 4 1/2" cans with chrome tips, as once I paid for and specified the 4" with chrome ends, and they had the bike, they installed black ends...when I picked it up, and pointed out the discrepancy, they checked, saw the error, had no 4" chromes in stock as they promised, but offered me the 4 1/2" at no extra charge. Gotta say, they are very rumbley and perfect with the bike. I live 25 minutes (12 miles of secondary roads) away from the dealer, but for some reason, it took 3 hours to get home...
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