top end noise and missing
Thread Starter
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Stellar HDF Member
Joined: Nov 2007
Posts: 2,121
Likes: 300
From: New Mexico-No, you don't need a passport.
top end noise and missing
I have a 95 flht, carbed with an 89" Ultima stroker kit and a crane cam. It also has adjustable pushrods but I don't know who made them.
I was cruising along at about 70 when the bike started getting a slight miss intermittently. I dropped down a gear to get the rpms up and seemed to clear up. I rode on for a little while and it started to get worse so I pulled over. I could hear a random clacking sound amidst the normally loud valvetrain noises. I turned it off and had it towed home.
I noticed a small film of oil on the rear exhaust header and the side cover. This is not normal on this bike.
I ran a compression test on a cold engine and got the following readings.
Front
Initial pulse to 60 psi and steadily up to 130 psi.
I ran it a few times and the results were the same.
Rear
first time
Initial pulse to 30 psi and slowly built up to 130.
second time
Initial 3 pulses showed 10 psi and then it built up to 90 psi.
third time
Initial pulse to 60 psi and built up to 130.
I randomly get good and bad readings on the back cylinder.
I get consistantly good readings on the front.
Any ideas?
I was cruising along at about 70 when the bike started getting a slight miss intermittently. I dropped down a gear to get the rpms up and seemed to clear up. I rode on for a little while and it started to get worse so I pulled over. I could hear a random clacking sound amidst the normally loud valvetrain noises. I turned it off and had it towed home.
I noticed a small film of oil on the rear exhaust header and the side cover. This is not normal on this bike.
I ran a compression test on a cold engine and got the following readings.
Front
Initial pulse to 60 psi and steadily up to 130 psi.
I ran it a few times and the results were the same.
Rear
first time
Initial pulse to 30 psi and slowly built up to 130.
second time
Initial 3 pulses showed 10 psi and then it built up to 90 psi.
third time
Initial pulse to 60 psi and built up to 130.
I randomly get good and bad readings on the back cylinder.
I get consistantly good readings on the front.
Any ideas?
Thread Starter
|
Stellar HDF Member
Joined: Nov 2007
Posts: 2,121
Likes: 300
From: New Mexico-No, you don't need a passport.
I had the throttle wide open while testing.
The bike has about 55,000 miles on it, but less than 10,000 since the stroker kit and cam were installed. I don't know if the lifters were replaced at that time.
The bike has about 55,000 miles on it, but less than 10,000 since the stroker kit and cam were installed. I don't know if the lifters were replaced at that time.
Road Master
Joined: Jul 2005
Posts: 1,061
Likes: 5
From: Fort Worth TX
After dealing with the ultima engines for several years in sizes from the 80 inchers to the 140's. We have found that have major issues with pulling cylinder stud, head bolts breaking, and the piston to wall clearances are less than up to par. Just re did a 120 here a few weeks ago. Puked a lifter, had over .006 thou piston to wall, had pull two cylinder studs as well. It had broke several head bolts in the past. The bolt would snap off at the junction of head. Quality wise some of these run decent and others are a lemon from the start.
Outstanding HDF Member
Joined: May 2008
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From: South Jersey
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Road Master
Joined: May 2007
Posts: 851
Likes: 5
From: Mitchellville, Ia.
lifters
I would suspect the lifters. I'd pull them out and change them, try some straight weight heavy oil and see if that doesn't quiet it down. We change them out on rebuilds if they have 8,000 miles on them, cheap insurance, we use regular factory units, not SE.
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