I am confused about the different pistons and rings.
I have seen pistons with the same part number (13101-275-020) that look different. Some of the are very polished aluminum and others are very dull (probably not aluminum). Are they labeled incorrectly? What is the difference (if any)? Is one better than the other?
I have seen piston #13101-275-020 matched up with ring # 13010-275-000. Is this correct?
I have seen piston #13101-266-020 matched up with ring # 13012-275-000. Is this correct and is this for a ca77 rather than a cb77?
I have made an assumption that the 130x0-275-000 rings go with the 1310x-275-020 pistons and the 130x2-275-000 rings go with the 1310x-266 pistons. Is this correct.
Thanks for any help,
Mickey
Matching Pistons to Rings - Help
From the CL77 Parts Catalog:
13101-275-020 is a standard size piston and the 13010-275-000 Ring set is correct; the 13012-275-000 ring set is a Chrome standard size. It is the first four digits that specify oversizes. PISTONS: 13102 is a .25 O/S 13103 is a .50 O/S 13104 is a .75 O/S 13105 is a 1.00 O/S RINGS 13010 is Standard 13020 is .025 O/S 13022 for Chrome 13030 is .50 O/S 13032 for Chrome 13040 is .75 O/S 13042 for Chrome 13050 is 1.00 O/S 13052 for Chrome
Hi,
Pistons for a CB72 / 77, C72 / 77 or CL72 / 77 are always from aluminum. Sometimes they get dull, because of age or oxidation. As long there are no real scratches it's o.k. Actually I'm not aware if there are pistons from Honda not made from aluminum. jensen assembly of Japanese motorcycles requires great peace of mind (Pirsig)
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