Question about 2004 Harley Davidson XL 1200 C Sportster Custom
Just installed 120 kit /happend after dyno was done / tryed new cams and lifters / still same noise
Hi Tom, and the usual suspects are:
1. Fuel octane rating too low.
2. Faulty spark plugs.
3. Incorrect spark plug for the kind of service.
4. Excessive carbon deposit on piston head or in combustion chamber.
5. Ignition timing advanced due to faulty sensor inputs (MAP, CKP, CMP)
Posted on May 28, 2015
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Posted on Jan 02, 2017
SOURCE: new pips
No.Although, it is a common practice to de-tune bikes at the factory so that they meet emissions requirements. All new injected HD's can expect a 4-6% increase in horsepower and 2-3% increase in torque just by dyno tuning the bike straight off the showroom floor. If you're riding a Low with a carb, then you do not need to have it re-jetted for slip-on's. If you're changing the exhaust from where it bolts to the engine, then yes you should. Dyno tuning is not as useful on carbureted bikes compared to injected ones, in fact I could tune a carbureted Low just as easily with an Exhaust Gas Analyzer as a dyno and save you $300. You're probably not that interested in minor differences in horsepower if you're doing slip-ons rather than a whole Screaming Eagle Stage 2 kit. Bolt 'em on and ride...
Posted on Nov 20, 2008
The only idea that i can come up with is that you dont have a good ground..or the guage was bad when you bought it..i hope this..Keith
Posted on Jul 02, 2009
I WOULD CHECK TIMNG AND MAKE SHERE YOUR GETING OIL TO UPPER END WHEN THEY DID UPGRADE DID THEY UPGRADE CAM BEARING TO IF NOT YOU COULD HAVE DONE MOTOR DAMAGE SEEN LOT OF THIS CANT USE STOCK BEARING NO NO OR YOUR LIFT IS TO HIGH FOR THE MOTOR ORAPLACATION HOPE THIS HELPS
Posted on Aug 13, 2009
better check for proper fuel flow weather their is no water penetrating in the fuel while in idle it can give problem 2nd thing is better check weather the spark plug are ok or not even sometime it can also cause problem so if required change the spark plugs or it is better you check in to an authorized Harley Davidson service station
Posted on Jun 29, 2010
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