Evo rocker box misalignment
Cruiser
Joined: Oct 2012
Posts: 167
Likes: 12
From: florida
middle piece
Had a top end done on my evo last year and it runs well. I was washing my bike the other day, however, and noticed that the rear cylinder middle rocker arm cover was misaligned with the upper and lower covers. Pretty significantly, too. They were also misaligned on the front cylinder, just not as much.
I asked the mechanic about it and he said it cant move once its bolted in place. I did not think that was the case, based on what Ive seen and heard, but he should know (right?).
Question is, can the middle cover migrate out of alignment with the other two? Its held with just a pinch fit between the upper and lower covers, I believe. The mech implied it must have been that way since the top end but Im sure I would have noticed it when washing it in the past. Either way, its not right in my book and should be corrected before they start leaking.
Any experience with this issue out there?
I asked the mechanic about it and he said it cant move once its bolted in place. I did not think that was the case, based on what Ive seen and heard, but he should know (right?).
Question is, can the middle cover migrate out of alignment with the other two? Its held with just a pinch fit between the upper and lower covers, I believe. The mech implied it must have been that way since the top end but Im sure I would have noticed it when washing it in the past. Either way, its not right in my book and should be corrected before they start leaking.
Any experience with this issue out there?
Elite HDF Member
Joined: Oct 2005
Posts: 3,872
Likes: 83
From: Canton, Michigan
Not familiar with how these center rocker frames feel. But based off the video, its plain to see and understand why The MoCo originally designed them that-away. Most as a gasked like application, with no squish ability. So it suffices me to conclude that proper alignement is crucial.
My final thought on them as far as their intended ourpose goes is... WHY?
So glad they abandoned them
My final thought on them as far as their intended ourpose goes is... WHY?
So glad they abandoned them
Just a WAG though....
Advanced
Joined: Jan 2017
Posts: 63
Likes: 15
From: New Zealand
middle rocker cover misalignment
Had a top end done on my evo last year and it runs well. I was washing my bike the other day, however, and noticed that the rear cylinder middle rocker arm cover was misaligned with the upper and lower covers. Pretty significantly, too. They were also misaligned on the front cylinder, just not as much.
I asked the mechanic about it and he said it cant move once its bolted in place. I did not think that was the case, based on what Ive seen and heard, but he should know (right?).
Question is, can the middle cover migrate out of alignment with the other two? Its held with just a pinch fit between the upper and lower covers, I believe. The mech implied it must have been that way since the top end but Im sure I would have noticed it when washing it in the past. Either way, its not right in my book and should be corrected before they start leaking.
Any experience with this issue out there?
I asked the mechanic about it and he said it cant move once its bolted in place. I did not think that was the case, based on what Ive seen and heard, but he should know (right?).
Question is, can the middle cover migrate out of alignment with the other two? Its held with just a pinch fit between the upper and lower covers, I believe. The mech implied it must have been that way since the top end but Im sure I would have noticed it when washing it in the past. Either way, its not right in my book and should be corrected before they start leaking.
Any experience with this issue out there?
Seasoned HDF Member
Joined: May 2008
Posts: 21,029
Likes: 12,551
From: South Carolina
If it is not leaking, leave it alone...
I have had all kinds of aggravation with the middle part of the rocker boxes on my `89 FLSTC.
Even when aligned perfectly, as soon as I tightened down the top cover they would move, or worse yet, they would bulge out.
Once I got the tops torqued, without too much bulging or squirming out of place they seemed to stay put, but it was always a pain.
I finally bit the bullet and bought a new set of OEM rockerboxes, and the new parts work great.
I have had all kinds of aggravation with the middle part of the rocker boxes on my `89 FLSTC.
Even when aligned perfectly, as soon as I tightened down the top cover they would move, or worse yet, they would bulge out.
Once I got the tops torqued, without too much bulging or squirming out of place they seemed to stay put, but it was always a pain.
I finally bit the bullet and bought a new set of OEM rockerboxes, and the new parts work great.
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