Hi, We have just fitted an EV27 cam, S/E adjustable pushrods, new HD Lifters & Crane Hi-4 single fire ignition to a mates 91 FXRS. Prior to fitting the parts the bike ran great, after fitting parts it runs/goes much better but now has a strange knocking sound coming from the top end at idle, with revs just off idle & the sound disappears.

We didn't remove rockers etc., cut old pushrods & fit adjustables.

6 months ago we did another mates 93 FXR with nearly the same parts (Dyna dual fire ignition & standard pushrods) & it doesn't have this problem, obviously we romoved rockers etc. to use standard pushrods.

Can anyone explain?

Nibbla

Scotty,

Have checked pushrods twice & it is correct as per HD instructions, tappets at lowest point, adjust pushrod to zero clearance then an extra 2 1/2 full turns, tighten locknut.

Pushrods are S/E quick install p/n 17987-98A

New HD lifters used.

Wozza, All spanners accounted for thanks for your input, lol

If the rocker shafts & bushing are worn shouldn't the noise have been their before the cam change?

How can we check & fix the pushrod rubbing the tube?

Thanks

Thanks Scotty, will check it out.

hi, did you re- shim up the cam to 0.006" to 0.012"  end float ,  as well as  the breather gear ?  breather gear can take more end-float ,       also as the  andrews cam is supplied with it's own driven gear you must also check for gear lash  from pinion to cam gear  + did you replace the inner cam bearing very important  , cheers

Update: I pulled the pushrods yeterday & found small marks on top of 3 pushrods & inside the tubes, machined 0.4mm out of the top of the tubes, put it back together, fired her up & the noise is gone.

Thanks alot for your help

Cheers