Cb360 base gasket and ring compressor

[Luck]

I own a74 cb360 that I have cleaned up and now assembling. IM wondering if the piston rings need to be orientated a certain way and if so, which way. Second, does anyone have a method for compressing the rings without a special compression tool? Finally, to add or not to add anything to base gasket when assembling? Thanks

 

[frogman]

Sounds like you need a manual

http://198.57.59.10/manuals/360/Honda_CB250_CB360_CL360_CJ250T_CJ360T_Shop_Manual.pdf

 

[elslimdiablo]

The rings get clocked 120 degrees apart. The bottom of the cylinders have a taper to them. Lube up the walls with motor oil or engine assembly lube and slowly slide the jugs down over the pistons. You will need compress the rings by hand as the pistons enter the taper. It is not hard, just keep things oiled up and go slow.

 

[Luck]

Thanks

 

[joea]

Some cylinders have a lot of taper that allow rings to enter more easily and of course the more cylinders the more complicated. it is best to use piston supports which can be made from bent up welding rod( u shaped)or wood, metal, nylon, etc. these will hold the pistons square on top of the cases. There are different kinds of ring compressor designs, you will need one that will keep rings compressed while the cylinder is lowered, some compressors will allow rings to expand before the rings enter the bore (if your cylinder has a lot of taper) You really do not want to oil your rings for assembly, just piston skirts and light coat on bore , other wise you may have issues with your rings seating. Another method is to install piston/rings in the bore and then put the pins/circlips in after you lower the cylinder onto the studs..

 

[mydlyfkryzis]

Large worm drive hose clamp can be used. I have done that, but I just seen someone else used a plastic soda bottle section under the clamp, slides a little easier...

 

[crazypj]

I gave up on the 120 degree nonsense years ago.
The rings rotate, at different rates for each ring.
The only thing that is even slightly important is to get side rails and expander of multi piece oil ring 'clocked' correctly.