Power Loss
Road Master
Joined: Apr 2012
Posts: 979
Likes: 38
From: new orleans,la
i wouldnt take it apart just yet-- 125/90 it will still run and run good -- check the timing like said-- mufflers or baffles in a 80" 68 main jet -- open pipes 70 main jet
how do the plugs look? clean? kinda gray/white? (unleaded fuel) -- best plugs i found are the autolite XS-65 gap to .040
gas cap vent -- see if it runs better with the cap off -- whats the inside of the pipes look like? black?? really black and sooty? both? just the rear?
does it smoke? blow a puff when you revv it?
and andrews cam if its like a "J" "A" small cams -- the jet is stock like --
does it start easy?? idle? or sound labored? pop ? spit?
i had one the dude put his own ignition in and turned it in retarts -- super slug -- i turned the breaker plate the opposit way and it cam to life -- before that it was a real dog -- nooooooo power --
how do the plugs look? clean? kinda gray/white? (unleaded fuel) -- best plugs i found are the autolite XS-65 gap to .040
gas cap vent -- see if it runs better with the cap off -- whats the inside of the pipes look like? black?? really black and sooty? both? just the rear?
does it smoke? blow a puff when you revv it?
and andrews cam if its like a "J" "A" small cams -- the jet is stock like --
does it start easy?? idle? or sound labored? pop ? spit?
i had one the dude put his own ignition in and turned it in retarts -- super slug -- i turned the breaker plate the opposit way and it cam to life -- before that it was a real dog -- nooooooo power --
Thread Starter
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Novice
Joined: May 2013
Posts: 15
Likes: 0
From: Minnesota
Did a leak down test
So did a leak down test & had air coming out the intake & exhaust on the rear cylinder. I did it four time just because I couldn't believe it was coming out both. So I guess it's looking like a head job.
Seasoned HDF Member
Joined: Nov 2006
Posts: 12,878
Likes: 5,449
From: la la land jerzey
i have seen valve guides soo worn that the two valves end up hitting each other - ( look at the two valves for bites ) and like i said you need to dissassemble and see what it needs to correct the issue
Outstanding HDF Member
Joined: Oct 2010
Posts: 2,706
Likes: 14
From: Near Frankenmuth, MI
Check and see if you have adjustable push rods. These have been known to become mis-adjusted on their own. You'll be checking for a locking nut that may have backed off and is allowing the push rod to contract / expand under vibrating running condition. This adjustment being wrong could account for both valves being open at the same time.
If you can borrow or rent a tiny inspection camera you could go in through the spark plug hole and see how carboned up things are. Maybe it's a speck of carbon leaving a valve open.
If you can borrow or rent a tiny inspection camera you could go in through the spark plug hole and see how carboned up things are. Maybe it's a speck of carbon leaving a valve open.
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Novice
Joined: May 2013
Posts: 15
Likes: 0
From: Minnesota
Push rods
The push rods are adjustable, & I took them completely out the 4th time I did the test to make sure they weren't the problem. The scope is a good idea, we have one at work for looking in walls, it will even take pics & video.
Road Master
Joined: Apr 2012
Posts: 979
Likes: 38
From: new orleans,la
More pipes that dont work correctly-- long front short rear-- have fun tuning that -- those fish tails interfere with the exhaust flow.. is that 2" pipes??? lol even on a 100" i and no one i know would run more than 1 3/4
Road Warrior
Joined: Mar 2011
Posts: 1,378
Likes: 2
From: Macon, GA USA
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Novice
Joined: May 2013
Posts: 15
Likes: 0
From: Minnesota
Since I'm pulling the heads tonight and possibly looking at a valve job I was considering putting a set of S&S heads on. Anyone have an opinion on them?
Road Master
Joined: Apr 2012
Posts: 979
Likes: 38
From: new orleans,la