Pushrods or timing?
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6th Gear
Joined: Jul 2006
Posts: 14
Likes: 0
Pushrods or timing?
Bike was running fine, except for a ticking from the front cylinder. Wasn't exhaust. Pulled my plugs and the front one was black and sooty, rear was normal. I was thinking I may have mal adjusted one of my front push rods, so I pulled em loose, rolled the motor to TDC and re-adjusted the rods out. When I put it all back together, the bike was real hard to start and back firing. Did I dick up my timing or my rods not adjusted all the way in? Any ideas before I tear it apart again will be much appreciated.
Specs: 1999 FLSTF Evo
S&S Super E
V&H Big shots
Jims powerglide tappets
Jims titanium adjustable pushrods
Andrews EV-27 cam
Elite 1 ignition set to single fire
Dual coil
everything else in the loop is pretty much stock(heads and valves)
Thanks for the help.
Specs: 1999 FLSTF Evo
S&S Super E
V&H Big shots
Jims powerglide tappets
Jims titanium adjustable pushrods
Andrews EV-27 cam
Elite 1 ignition set to single fire
Dual coil
everything else in the loop is pretty much stock(heads and valves)
Thanks for the help.
Tourer
Joined: May 2006
Posts: 458
Likes: 5
From:
RE: Pushrods or timing?
Here's the procedure I use.
1. lift rear tire off the ground
2. shift into 5th gear
3. remove pushrod covers
4. hold them up with clothes pins or rubber bands and paperclips
5. rotate rear tire until the lifter you want to adjust is at it's lowest point
6. collapse (shorten) the pushrod until it moves up and down slightly
7. extend pushrod until it just starts to touch the lifter
8. exten it further the proper amount of turns (to equal approx. .100 inch (mid range of the lifter's travel)
9. wait until you can spin it by hand easily, then torque locknut
10. move to next lifter and repeat steps 5-9
That's it.
By the way, you will probably not be able to completely get rid of the ticking, especially from the front cylinder exhaust lifter. The EV27 cam is notorious for being noisy. There are a couple ways to reduce the noise, but it's not that important. The bike will still run strong. I rev my EVO with the EV27 to 6500 rpm with no problems (of course I have different valve springs and valves). To reduce the ticking, you can press the original cam gear onto the EV27 cam; or properly set the gear lash using a different size pinion gear. Sometimes it's just the pushrod hitting the pushrod cover. You can sometimes remove some material with a file to stop it from hitting. Put your finger on the tube while it's running and you can easily tell if that is the problem.
Personally, I'd adjust them as required and leave them alone. If the ticking bothers you, get louder pipes, remove the windshield, or wear earplugs. The ticking will have no ill effects on your engine.
1. lift rear tire off the ground
2. shift into 5th gear
3. remove pushrod covers
4. hold them up with clothes pins or rubber bands and paperclips
5. rotate rear tire until the lifter you want to adjust is at it's lowest point
6. collapse (shorten) the pushrod until it moves up and down slightly
7. extend pushrod until it just starts to touch the lifter
8. exten it further the proper amount of turns (to equal approx. .100 inch (mid range of the lifter's travel)
9. wait until you can spin it by hand easily, then torque locknut
10. move to next lifter and repeat steps 5-9
That's it.
By the way, you will probably not be able to completely get rid of the ticking, especially from the front cylinder exhaust lifter. The EV27 cam is notorious for being noisy. There are a couple ways to reduce the noise, but it's not that important. The bike will still run strong. I rev my EVO with the EV27 to 6500 rpm with no problems (of course I have different valve springs and valves). To reduce the ticking, you can press the original cam gear onto the EV27 cam; or properly set the gear lash using a different size pinion gear. Sometimes it's just the pushrod hitting the pushrod cover. You can sometimes remove some material with a file to stop it from hitting. Put your finger on the tube while it's running and you can easily tell if that is the problem.
Personally, I'd adjust them as required and leave them alone. If the ticking bothers you, get louder pipes, remove the windshield, or wear earplugs. The ticking will have no ill effects on your engine.
Banned
Joined: Jul 2006
Posts: 866
Likes: 1
From:
RE: Pushrods or timing?
The motor must be completely cold when you adjust pushrods, or they will be too long when it cools. When this happens, they can hold a valve open on startup which makes it hard to start and backfire through the intake.
Thread Starter
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6th Gear
Joined: Jul 2006
Posts: 14
Likes: 0
RE: Pushrods or timing?
All done, bike starts fine and no ticking. Have noticed some back fire off the front cylinder, I'm talking fire ***** rolling out of the pipe when I roll the throttle up. I'm scratching my head now.
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5th Gear
Joined: Oct 2005
Posts: 9
Likes: 0
RE: Pushrods or timing?
Could be a victim of circumstances...........have you checked for an intake leak? If the tick's gone, then that's what the symptoms point to.
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