103 diaster
Thread Starter
|
Cruiser
Joined: May 2009
Posts: 121
Likes: 1
From: Oregon
103 diaster
Just had a 103 mod done to 2009 RG......it is crap.....I was told torque inprovement at 2500 rpm to 3000 was great.....the opposite is true. The engine acts like it is laboring to get over the 3000 rpm level. New cam makes run rougher at low street speeds......this 103 has converted the bike to an 88. Dealer is dealing with pipe backpressure issues....new screaming eagles are going on.....
any ideas...thoughts...comments...solutions
any ideas...thoughts...comments...solutions
Road Warrior
Joined: Aug 2008
Posts: 1,345
Likes: 0
From: Metro Denver
1) Did the bike get dyno'd? If so, can you post the dyno chart(s)?
2) What CAM did you put in?
3) What tuner was used (HD SERT or other 3rd party)?
Stock pipes with a 103 may not be the best route to go, as they are not designed (IMO) with performance in mind.
I'm sure others such as Dawg, iClick, PhilM, Dalton & UltraKla$$ic and others can weigh in here with far more knowledge than I have.
2) What CAM did you put in?
3) What tuner was used (HD SERT or other 3rd party)?
Stock pipes with a 103 may not be the best route to go, as they are not designed (IMO) with performance in mind.
I'm sure others such as Dawg, iClick, PhilM, Dalton & UltraKla$$ic and others can weigh in here with far more knowledge than I have.
Road Warrior
Joined: Oct 2007
Posts: 1,989
Likes: 11
From: Right Coast
Not sure that SE mufflers are the cure. Not sure that back-pressure is the problem.
Have they checked the EFI mod calibrations or are they even competent at calibrating? Did you add a SEST or PC-V, etc? If not, I would give consideration to this.
The fact is the HD heads don't breath as well as say the S&S heads and perhaps you were expecting too much.
Whatever the issue it would appear the dealer needs to revisit what was done instead of simply adding their own slip-ons.
Have they checked the EFI mod calibrations or are they even competent at calibrating? Did you add a SEST or PC-V, etc? If not, I would give consideration to this.
The fact is the HD heads don't breath as well as say the S&S heads and perhaps you were expecting too much.
Whatever the issue it would appear the dealer needs to revisit what was done instead of simply adding their own slip-ons.
Ultimate HDF Member
Joined: Feb 2006
Posts: 5,190
Likes: 5
From: Eastern Washington
That doesn't seem right. Like KoalaCowboy said, was it dyno'd? SERT? or some other tuner? A little more info needed. I have an 09 103 and when I goose it at 3000 rpm, it really takes off
Road Warrior
Joined: Aug 2008
Posts: 1,442
Likes: 8
From: south
Trending Topics
Extreme HDF Member
Joined: Sep 2005
Posts: 11,615
Likes: 50
From: Baton Rouge, LA
A 103 alone won't make much difference in performance, but it should not make it run worse. I couldn't blame the mufflers, as even with stockers installed it should still run better than a stock TC96. Hard to tell with so little info, as we need to know if it was a full Stage II or just a 103, what tuner or ECM download is being used (if any), etc.
HD Forum Stories
The Best of Harley-Davidson for Lifelong Riders
7 Surprising Harley-Davidson Products that Are Not Motorcycles
Verdad Gallardo
8 Best Harley-Davidson Motorcycles Ever
Pouria Savadkouei
10 Worst Harley-Davidson Motorcycles Ever
Pouria Savadkouei
Killer Custom's Jail Break Is The Breakout That Refused to Blend In
Verdad Gallardo
Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?
Verdad Gallardo
Harley-Davidson Reveals Super Cool Cafe Racer Concept
Verdad Gallardo
Engraved Rebellion: Inside Bundnerbike's Glam Rock II
Verdad Gallardo
10 Motorcycles You Should Never Buy
Joe Kucinski
10 Things Harley-Davidson Needs to Fix in 2026
Verdad Gallardo
Ultimate HDF Member
Joined: Feb 2006
Posts: 5,939
Likes: 3
From: TX
Given that he stated "new cams" and 103 upgrade, it's "more than likely" a Stage 2 HD kit with 255 cams ~ in which case it should at least run "decent", somewhat better than stock.
A couple quick things to check things to look at on this one.
1) As has been mentioned - TUNE.... The tune will make or BREAK a build.
2) Assembly. Things like intake leak (impossible to tune), oil pump alignment / installation (can cause sumping).
3) Was it "tuned" or did they just throw some random HD flash into the computer?
First off ~ it sounds like your dealer is of marginal competence, based solely on the fact that they would deliver the bike in such a condtition. I would strongly consider finding someone ELSE to "fix it".
You DO NOT need S/E heads!!!!! Let me repeat that. YOU DO NOT NEED S/E HEADS!
The cams in that package are NOT designed to work with those heads. **Unless** they used the wrong cam in the first place.
DANGER Will Robinson.... Find someone with a clue... do not have $10/hr monkeys experimenting on your scoot!
A couple quick things to check things to look at on this one.
1) As has been mentioned - TUNE.... The tune will make or BREAK a build.
2) Assembly. Things like intake leak (impossible to tune), oil pump alignment / installation (can cause sumping).
3) Was it "tuned" or did they just throw some random HD flash into the computer?
First off ~ it sounds like your dealer is of marginal competence, based solely on the fact that they would deliver the bike in such a condtition. I would strongly consider finding someone ELSE to "fix it".
You DO NOT need S/E heads!!!!! Let me repeat that. YOU DO NOT NEED S/E HEADS!
The cams in that package are NOT designed to work with those heads. **Unless** they used the wrong cam in the first place.
DANGER Will Robinson.... Find someone with a clue... do not have $10/hr monkeys experimenting on your scoot!
Tourer
Joined: Jan 2010
Posts: 473
Likes: 0
Just had a 103 mod done to 2009 RG......it is crap.....I was told torque inprovement at 2500 rpm to 3000 was great.....the opposite is true. The engine acts like it is laboring to get over the 3000 rpm level. New cam makes run rougher at low street speeds......this 103 has converted the bike to an 88. Dealer is dealing with pipe backpressure issues....new screaming eagles are going on.....
any ideas...thoughts...comments...solutions
any ideas...thoughts...comments...solutions
Last edited by never say never; Feb 19, 2010 at 10:48 AM.