Aftermarket rocker shafts....
#1
Aftermarket rocker shafts....
Hey guys, I am working on rebuilding the motor on what was originally a 1984 FXSB. I'm currently working on the rocker boxes and am replacing the rocker arms and shafts. I bought the J & P set and started fitting them yesterday. I put each shaft into the box, through the arm and spacer and went to torque the end nut down to measure the gap to see if I would need a shim. What I found was that all 4, when torqued down, ended up locking up the arm so that it wouldn't rock. After some confusion (I'm not a veteran at this) I finally figured out that the new aftermarket shafts, when measuring from the inside of the spacer (when pushed up as far as possible) to the inside edge of the "big" end of the shaft it was about .010 shorter than the old oem ones that had been in there previously. This basically allows for no room for the arm to have the recommended .004-.020 gap. What gives? I ordered up some Sifton brand arms from eBay today and will compare when they arrive. Did I do something wrong? From what I see there is no way to use the J & P brand shafts without machining the ends of the arms to shorten their length.
Hopefully my description is good enough.
Thanks!
Hopefully my description is good enough.
Thanks!
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Join Date: Oct 2005
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ReAnna's Father (11-25-2022)
#7
You could also look at Eastern rocker shafts - made in the USA and seem to have a good reputation:
http://www.easternmotorcycleparts.co...E_136_137.html
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The one on the left is my new one. The one on the right is the one from J & P that was too short (that J & P said would fit 😑. I haven't had a chance to install the new ones yet to see how they fit but I am optimistic. The Eastern one looks like the one I'm replacing.