Harley Davidson Engine Knock Idle

The small needle bearing goes bad and it starts to knock.

Harley davidson engine knock idle. I have a 2005 harley davidson ultra classic with a 88 cubic inch engine. It seems to go away after engine is warm. There may be something loose somewhere.

Youll need high-octane fuel to prevent the engine from knocking. I just dont fkg know for sure but its the best guess at this point since the forged pistons arent following the normal rules. I would say once past 2500-2800 rpms it would start knocking.

Bike still under warranty and dealer is suggesting carbon build up in head wants to tear down engine. Noise will also disappear at acceleration. It could also be the throttle body butterflies pulsing with the vaccum when they are almost shut idle.

Im sorry but I dont know a lot about the Twin Cam engines but they are not that much different from the Evolution engines. Filed under Harley Tips. Unless the motor has very high mileage and has been lugged regularly causing connecting rod bearing failure the most common cause of knocking in a Harley.

Always try maintaining this range while for a fuel-injection installed Harley Davidson. If this is the case they may be able to be closed more and let the IAC take care of adjusting the idle. 2012 FLTRU Harley Davidson Twin Cam 103 ticking sound starts on cold start up 21000 miles.

There is a knocking in the engine. The noise will disappear when plug with bad piston is shorted. Only when the exhaust warmed and the clambs expanded.