2002 hd fat boy 1450 kiryakin air filter vince hines 2in1 pipe 16000km my problems is on the left side on both top valve cover theres a clicking noise coming from there more likely when the engine warms up its a steady clicking noise like a click clik clik clik all the time

believe carb adjustment bad & carb needs to be rejetted to exhaust, believe you need to add a higher flow gas valve & possibly new plugs & wires

Are you sure it's not the idle air valve as they can sound louder after changing to a high flow filter...take the filter off and shine a light in the intake when turning the ignition on and off. The idle valve is just inside the intake in a hole at the top...see if it moves in time with the noise that you hear

Removing the baffles will lean out the mixture, so either rejetting the carb, or reprogramming the ECM or a "piggy-back" unit installed will be needed.

Actually, open "straight" pipes are the worse for performance, as some back pressure is needed.

Also, to help performance with a "free flowing" exhaust, a more "free flowing" air cleaner would be needed.

With aftermarket pipes they will almost always run on the lean side due to the reduction in back pressure...Retuning the carb is required. If you have an aftermarket air intake, this will also effect it.

I would purchase a Harley Davidson repair manual or get one on CD from ebay not as much as a paperback and just as good. The repair manual is a mechanics best friend. Remember buy one it is the best friend you can have when doing maintenance on you harley.

The drain plug can be hard to find. In the 2001 Fat Boy, it is in front of the back motorcycle tire between the Fat Boy's rear shocks.

To do the oil change you need to warm up the oil so it drains better.

Tilt the motorcycle to its right side and position your oil catchment container under the oil plug.

Use your wrench set to unscrew the oil drain plug. In a 2001 Harley Davidson Fat Boy, you need a wrench that will fit a 1/4-inch screw.

Drain the oil. While oil is draining from your Harley Davidson, use the time to clean out the magnet and rubber ring positioned under the oil drain plug.

Remove and replace the oil filter after the oil has drained. Refill with 3 to 4 quarts of engine oil. Replace all parts, including drain plug.

Remember the HD manual will tell you how to check the level of primary fluid needed. Each HD is different and needs different amounts.

You check your primary fluid level through the inspection cover, which is the oval cover in the middle of the primary cover. You'll need a T25 Torx wrench to remove the bolts. Have a new inspection cover gasket in case you need it.

Add the fluid through the inspection cover. You can use any kind of oil petroleum or synthetic as long as it does not contain friction modifiers.

replace the gasket on the inspection cover if needed. Tighten bolts finger tight; then tighten the bolts at 10 foot pounds. Start with the top bolt and then tighten the bottom bolt. The third bolt is the right one, and the left bolt is last.

I’m happy to help further over the phone at https://www.6ya.com/expert/al_e83b1941f9c0f302

.038-.043 Per the HD manual

On the fatboy, the oil drain plug should be on the right side, just under the frame, directly below the oil tank. The primary drain is on the left side under the derby cover on the bottom. The tranny drain is on the bottom towards the rear pretty much centered.
And, as our darlin' little miss piglet said, a maual is worth the investment.

most left hand noises invole the compensating sprocket/alternator area, and back along the primary chain to the clutch hub. bearing failure would be noticed at low rpm, so i doubt this problem has anything to do with your 1550 kit