Won't start after big bore install
Outstanding HDF Member
Joined: Apr 2012
Posts: 2,938
Likes: 30
From: North Florida
When the valves are closed, cam off the lobe, can you spin the push rods with your fingers?
Stellar HDF Member
Joined: Jan 2013
Posts: 2,464
Likes: 50
From: Rouses Point, N.Y.
when you but quality tools like snapon tools there is no problems with the accuracy.
HDF Community Team
Joined: Jun 2006
Posts: 12,776
Likes: 2,607
From: san antonio
Suggest you get back to a known baseline and install the OEM pushrods in the right places; intake=silver/shorter, exhaust=black/longer. The motor will not run with an exhaust pushrod on the intake side which may have been your problem before. Install the OEM pushrods back in the proper locations and, if cam timing, etc. is correct and battery is strong, she will start; valve train will rattle but she will start. If the motor doesn't start, there is something else going on, cam timing probably, or you have already bent a valve. We will have to figure that out then.
However, if she starts, you can then replace the OEM pushrods with the adjustables. Pick a cylinder, remove the plugs and rotate the motor until the piston on that cylinder is at or near TDC ON THE COMPRESSION stroke; remove the OEM pushrods and install the adjustable; set them at 3 to 3.5 turns.
Now rotate the motor until the other piston as at or near TDC ON THE COMPRESSION stroke; remove the OEM pushrods and install and adjust the adjustables. Replace plugs and the motor should start and run. JMHO.
Banned
Joined: Sep 2009
Posts: 3,569
Likes: 624
From: deland,florida
unfortunately,it only takes once of not letting the p/rods bleed down to bend the valves.take the p/rods out and verify compession,dont really even need a gauge at this point.the thumb over the spark plug hole test will do this.if there is compression,either the p/rods are adjusted incorrectly or the cam timing is off.i installed the cams on the plate (the outer spockets could still be off,are they off,who knows without checking (if they are off on the actual install in the plate,its a first,but like everyone,im not perfect and not going to say ive never made a mistake).but I think you've got to pop the cover off & make sure
Outstanding HDF Member
Joined: Apr 2012
Posts: 2,938
Likes: 30
From: North Florida
OK Jameson said
Could it be a bad lifter not bleading down holding a valve open?
.
.
Tourer
Joined: Jun 2008
Posts: 306
Likes: 7
From: Somewhere, PA
unfortunately,it only takes once of not letting the p/rods bleed down to bend the valves.take the p/rods out and verify compession,dont really even need a gauge at this point.the thumb over the spark plug hole test will do this.if there is compression,either the p/rods are adjusted incorrectly or the cam timing is off.i installed the cams on the plate (the outer spockets could still be off,are they off,who knows without checking (if they are off on the actual install in the plate,its a first,but like everyone,im not perfect and not going to say ive never made a mistake).but I think you've got to pop the cover off & make sure
Thread Starter
|
Road Captain
Joined: Feb 2007
Posts: 551
Likes: 2
From: Fort Bragg, NC
Last edited by Jameson; Mar 15, 2015 at 07:11 PM.
HD Forum Stories
The Best of Harley-Davidson for Lifelong Riders
7 Surprising Harley-Davidson Products that Are Not Motorcycles
Verdad Gallardo
8 Best Harley-Davidson Motorcycles Ever
Pouria Savadkouei
10 Worst Harley-Davidson Motorcycles Ever
Pouria Savadkouei
Killer Custom's Jail Break Is The Breakout That Refused to Blend In
Verdad Gallardo
Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?
Verdad Gallardo
Harley-Davidson Reveals Super Cool Cafe Racer Concept
Verdad Gallardo
Engraved Rebellion: Inside Bundnerbike's Glam Rock II
Verdad Gallardo
10 Motorcycles You Should Never Buy
Joe Kucinski
10 Things Harley-Davidson Needs to Fix in 2026
Verdad Gallardo
Outstanding HDF Member
Joined: May 2014
Posts: 2,449
Likes: 6
From: Memphis
Outstanding HDF Member
Joined: Apr 2012
Posts: 2,938
Likes: 30
From: North Florida