SOHC.co.uk Forums > CB350/400

Barrels on but pistons won't move, what's going on. Help me !!!

<< < (2/6) > >>

billdn:

--- Quote from: Nurse Julie on May 21, 2022, 03:58:22 PM ---Another thought Bill, did whom ever do the rebore physically have the new pistons when the work was done?

--- End quote ---
Julie, yes he had pistons , rings not fitted but then you wouldn't 😉

billdn:

--- Quote from: Johnwebley on May 21, 2022, 04:47:27 PM ---Check the ring gaps,


Do the pistons move in the bores without the rings?

Sent from my SM-A750FN using Tapatalk

--- End quote ---

Took ages of gentle tapping to remove barrels, so tight and I mean no slide at all.
Chucked the towel in for today, but tomorrow will remove 1piston, measure bore with vernier as best I can   and try piston with no rings, looks like bottom set on 1 are toast anyway.
Cursory measure made with steel rule and barrel diameter looks like 51.5, crude measure I know.
Keep you posted, thanks Julie and John

Nurse Julie:
Measure the ring end gap Bill whilst the piston/ rings are in the bores. This will tell you quite a bit.

Johnwebley:

--- Quote from: Nurse Julie on May 21, 2022, 05:43:49 PM ---Measure the ring end gap Bill whilst the piston/ rings are in the bores. This will tell you quite a bit.

--- End quote ---
I suggest you attempt to slide a piston down the bore,

Use the piston to push the loose separate rings down the bore,it will keep the rings square in the bore,


Also,check the depth of the ring grooves, it is a slim chance they're not deep enough, causing the rings to protrude to much.



Sent from my SM-A750FN using Tapatalk

billdn:
That's tomorrow sorted then,
Rings and pistons from DS so should be OK but we've all been there before.

Navigation

[0] Message Index

[#] Next page

[*] Previous page