Head off help

[97tiger885]

The liners are out, marked, lightly oiled and bagged.

Should I pull the pistons to check them and the rings?   I can clean the pistons  in place. 

[ram33]

well done 

i removed mine just so i could remove some light scoring i had. if you don't need to then i wouldn't bother as i found it quite fiddly to get the circlips in and out (don't forget to put new ones in if you do)
just pack around pistons well so no bits drop inside

[97tiger885]

well done 

i removed mine just so i could remove some light scoring i had. if you don't need to then i wouldn't bother as i found it quite fiddly to get the circlips in and out (don't forget to put new ones in if you do)
just pack around pistons well so no bits drop inside

One vote for no.   I like it.

[97tiger885]

The pistons are clean enough.



Next is getting the rings set in the proper positions.



Getting both 3s and 4 set wasn't happening.  So, I pulled rings one and two to make it easier.  Here is what I found.

This is ring 2 with the marked edge up.  It reads 2NPR?  2NFR?  The mark was up in the second grovve.




Here is another photo of ring 2.  This is top side up.




Here is ring 1.  No mark.  This was the bottom side in the groove.



Here is the top side of ring 1.  No mark.  This is suposed to be marked and have  a chamfered edge.  Can anybody see the chamfering?   I can talk myself into seeing it if I stare at long enough.  Should the chafered edge be obvious or is it very slight?  I even used a magnifying glass.  No help.




Any thoughts here?   Should I buy rings just to be sure?  Are these replacement rings proving the head has been off previously?

[ram33]

must admit i didn't put the rings in the positions shown as i already had head back on before i read that bit. cant say it seems to make much difference and i would have thought the rings would gradually work there way into other positions anyway

[Mustang]

I vote for new rings

why did you take it apart ?

[97tiger885]

I vote for new rings

why did you take it apart ?

I was hoping you would have an opinion.  Okay, new rings.  Any rings in particular?  OEM from BikeBandit good enough?

Blown head gasket.

[Mustang]

I vote for new rings

why did you take it apart ?

I was hoping you would have an opinion.  Okay, new rings.  Any rings in particular?  OEM from BikeBandit good enough?

Blown head gasket.

OEM rings are plenty good .
can you still see cross hatch marks in the cylinder bores ? that's a good thing .

[97tiger885]

I vote for new rings o

why did you take it apart ?

I was hoping you would have an opinion.  Okay, new rings.  Any rings in particular?  OEM from BikeBandit good enough?

Blown head gasket.

OEM rings are plenty good .
can you still see cross hatch marks in the cylinder bores ? that's a good thing .

OEM it is. 

Cross hatching visible on all three:

Cyl 1



Cyl 2




Cyl 3

[Sin_Tiger]

  perfect, don't touch them 

[97tiger885]

perfect, don't touch them 

Good.

Just ordered rings and cam bolts.  Be a while for those.

Next up is lapping the valves.  Watched a few videos.  Doesn't look too hard.  Tomorrow lapping tool,  grinding compound,  oil can and acetone (to clean gasket faces).

[Sin_Tiger]

perfect, don't touch them 

Good.

Just ordered rings and cam bolts.  Be a while for those.

Next up is lapping the valves.  Watched a few videos.  Doesn't look too hard.  Tomorrow lapping tool,  grinding compound,  oil can and acetone (to clean gasket faces).

Do the absolute minimum, contact is good enough, don't try to get a wide band or all the imperfections out, just wasting metal and your time. Keep it moving and don't be tempted to use a drill unless you have an oscillating tool.

[97tiger885]

Do the absolute minimum, contact is good enough, don't try to get a wide band or all the imperfections out, just wasting metal and your time. Keep it moving and don't be tempted to use a drill unless you have an oscillating tool.

Okay.  Plan is  hand power only.  No power tools.

Good video at

http://youtu.be/7GEmuQa3dPY.