bearings
Not gong to be able to check rod bearings thru pan. Can get to 2 and 3 thru pan but not enough room to check em.
If your going to check the bearings, doing so by trying to "wiggle em by hand" will only let you know if one is "real bad".
Should check w/plastigauge.
Don't do this w/o manual........
Splitting cases not that hard, but takes some time. After you get the bottom case off, all the bearings are easy to get to. Check mains while in there.
The case bolt holes are numbered. I take a piece of card board and pop holes in it to hold bolts as I remove em (One piece for top, another for bottom, felt pen number card board holes). Place other parts that go together in plastic bags.
Can sorta sound like a rod knock, but not (sorry....hard to explain noise) and can get Louder under load. Sound may seem to originate from other than cylinders.
Should be noticeable scratches on piston with corresponding scratches on cylinder wall. Will just get worse longer engine is run.
On the one engine I repaired for this, #3 cylinder was just with in spec and so was the piston, but there were the scratches. (think one bolt was coming loose on rod cap) Was just going to hone cylinder and stick in new piston/rod/rings/bearing (bearing was in spec too). But then felt uncomfortable about cylinder, so replaced cylinder and pistons etc. from a parts bike. Good as new.
mro
btw
my 80G might be developing "piston slap" and sorta sounds like what Geezer describes, but going to ride it till bad and then do like I did to other one.
Not gong to be able to check rod bearings thru pan. Can get to 2 and 3 thru pan but not enough room to check em.
If your going to check the bearings, doing so by trying to "wiggle em by hand" will only let you know if one is "real bad".
Should check w/plastigauge.
Don't do this w/o manual........
Splitting cases not that hard, but takes some time. After you get the bottom case off, all the bearings are easy to get to. Check mains while in there.
The case bolt holes are numbered. I take a piece of card board and pop holes in it to hold bolts as I remove em (One piece for top, another for bottom, felt pen number card board holes). Place other parts that go together in plastic bags.
[Originally posted by Geezer[/I]
Piston slap sounds like a rattle at and idle and usually goes away at higher RPM.
Piston slap sounds like a rattle at and idle and usually goes away at higher RPM.
Should be noticeable scratches on piston with corresponding scratches on cylinder wall. Will just get worse longer engine is run.
On the one engine I repaired for this, #3 cylinder was just with in spec and so was the piston, but there were the scratches. (think one bolt was coming loose on rod cap) Was just going to hone cylinder and stick in new piston/rod/rings/bearing (bearing was in spec too). But then felt uncomfortable about cylinder, so replaced cylinder and pistons etc. from a parts bike. Good as new.
mro
btw
my 80G might be developing "piston slap" and sorta sounds like what Geezer describes, but going to ride it till bad and then do like I did to other one.
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