Replies to This Discussion

Permalink Reply by Hammer on December 17, 2010 at 9:44pm

I dunno.....but I double checked the specs, cuz I just bought a 2010 Limited and she's got the 103. I thought my comp ratio was higher.....and it is at 9.7:1. Man is she feisty too. Glad I did her and not the CVO now. I just don't know, never did understand the thinking of engineers as an auto tech.

Permalink Reply by randyg on February 27, 2011 at 1:50am

THE HARLEYS FROM THEJ FACTORY RUN LEAN. THEY ALWAYS HAVE TO PASS EXHAUST EMMISIONS TEST. YOU HAVE TO PUT A DIGITAL FUEL OPTIMIZER ON THEM TO HAVE A RICHER FUEL MIXTURE. THAT IS WHAT IS MAKING A STOCK HARLEY RUN HOT. HARLEY MAKES A FUEL TUNER THAT TAKES CARE OF THIS PROBLEM. ALSO AFTERMARKET DFO  IS A POWER COMMANDER AND TUNERS OF THAT SORT. BET THE HEAT IS CAUSED BY A MOTOR RUNNING WITH NOT ENOUGH FUEL RUNNING THROUGH IT OR IN OTHER WORDS RUNNING LEAN....COMP. DOESN'T DO IT, THE FUEL MIXTURE CAUSES HEAT. BUT GET READY TO SPEND SOME MONEY CAUSE THEY ARE NOT CHEAP, NOT THE GOOD ONES.  YOU ARE LOOKING AT A FEW HUNDRED DOLLARS.

Permalink Reply by randyg on February 27, 2011 at 1:55am

MY ULTRA HAS A 103 CI. AND IT HAS A COMP; RATIO OF 10.2 TO 1 AND THATS AS HIGH AS YOU WANT TO GO BECAUSE YOU HAVE TROUBLE WITH GETTING A PING IN THE ENGINE BECAUSE OF THE GAS WE HAVE NOW DAYS. THE HIGHER THE COMP. THE MORE YOU ARE LIKELY TO GET A PING IN THE MOTOR AND THATS NOT GOOD FOR THEM.

Permalink Reply by shortycmc1 on June 26, 2011 at 8:39am

ok I have an 07 ultra, with 10.5 to 1 pistons, 255 cams billit cam plate gives better support for the cams. (twice as many needle bearings). python headers with torque cones, removed the nose cones off the mufflers and used a drumel and removed the baffels. It started as a 103, however, last year my oil pressure started falling at red lights. Had the local h-d dealer check it and said it was ok. After the motor blew up because the main crank bearings went out. H-D rep. in WI. said it was common from 2003-2009. last dino has it at 106, was thinking about the 110ci, but they advised me not to. the 110 put out 89 hp. with the 103 you can put larger valves and 350 cam and have over 100 hp.   I installed the true duals this spring,  thwe bike runs stronger and cooler. found the stock headers have dents on the back side for clearance.  Harley had to pay for the repairs, they put 2002 main crank bearings. I bought my wife a 2010 triglide last year and asked if the same thing would happen to it. They told me no that they changed the angle of the crank bearings.  they also have been having problems with the cam chains. creating a noise that sounds like lifter issues.  I hope that this helps some of you.  Have a great riding year.

Permalink Reply by Laurie Bailey on June 26, 2011 at 9:26am

2008-cvo-ultra. have rine hart true duals,breather kit,power comander,the 110 still runs hot,iam going to replace cams, rear head gasket went 8000ks,.cheers.