« Reply #878 on: August 30, 2024, 06:29:56 AM »
Could be your buddy you got them from coated them with Eastwood's coating and put them back away..
That may well be what happened. I’ll take a snapshot tomorrow and ask him, but I don’t think he even opened the carton. I had to pop the staples.
I was beginning to wonder if I imagined this? These “no number” Yamiya pipes are definitely coated internally, end to end. Lucky me. See photo.
I think you will find that is not a ceramic coating and that it is only a superficial paint coating that covers the end perforated tube. My Yamiya no number also have this but if you poke a bore scope down you will probably no further coating inside the silencer bodies but traces of rust from the plating process, as I found in mine, see attached. I did raise my concerns about the level of internal rust with D Silver but he just said that was normal!!!!!!!!!
That's to the point where I'd probably plug the end and fill them with Evaporust for a couple days, rinse them out with diesel fuel and at least coat with 2 stroke oil to preserve them, or ceramic coat them with Eastwood's kit.
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Stu
Honda Parts manager in the mid 1970s Nashua Honda
My current rides
1975 K5 Planet Blue my summer ride, it was a friend's bike I worked with at the Honda shop in 76, lots of fun to be on it again
1976 K6 Anteres Red rebuilding project, was originally my brother's that I set up from the crate, it'll breath again soon!
Project 750s, 2 K4, 2 K6, 1 K8
2008 GL1800 my daily ride and cross country runner
Prior bikes....
1972 Suzuki GT380 I had charge of it for a year in 1973 while my friend was deployed and learned to love street riding....
New CB450 K7 after my friend returned...
New CB750 K5 Planet Blue, demise by ex cousin in law at 9,000 miles...
New CB750 K6 Anteres Red, to replace the totaled K5, I sold this K6 at 45k in 1983, I had heavily modified it, many great memories on it and have missed it greatly.....
1983 GL1100A, 1999 GL1500 SE, 1999 GL1500A