Honda-SOHC

SOHC.co.uk Forums => CB500/550 => Topic started by: Seabeowner on January 31, 2017, 11:11:44 AM

Title: 500K Transmission Bearings
Post by: Seabeowner on January 31, 2017, 11:11:44 AM: Just about to start stripping the 500K1 down to replace a seriously flapping primary chain. Obviously cam chain at the same time.
Bike runs ok and oil pressure good, so not planning to change main or crank bearings unless I find anything.
But there is a bit of whine from somewhere when I pull away.
Should any particular bearings be replaced as a matter of course while I'm in there?
Thanks for any help, Phil
Title: Re: 500K Transmission Bearings
Post by: Bryanj on January 31, 2017, 04:14:37 PM: The only bearing i have ever seen give trouble is the needle roller and these are very difficult to get now
Title: Re: 500K Transmission Bearings
Post by: sgd37 on January 31, 2017, 04:52:36 PM: Hi all,

Sorry to butt in Seabe but I have a similar question. I left one of the bearings in the crankcase (http://www.cmsnl.com/honda-cb500k1-four-general-export_model14659/partslist/E15.html#results part#24) when I put it through the dishwasher so it picked up some surface rust and now it feels a bit grainy. I bought an open 6205 c3 NTN but now I'm thinking if there wasn't a better brand or type. Also is there a proper installation procedure or is it fairly straight forward?

Cheers
Title: Re: 500K Transmission Bearings
Post by: Bryanj on February 01, 2017, 10:04:04 AM: NTN was one of Hondas original suppliers
Title: Re: 500K Transmission Bearings
Post by: sgd37 on February 01, 2017, 05:56:57 PM: True it even says that on the old bearing (except now it's made in taiwan). It's just that apparently for some people NTN stands for never trust nippon, but I guess they're good enough for the transmission on a CB.

Sorry if it was a stupid question.
Title: Re: 500K Transmission Bearings
Post by: Bryanj on February 02, 2017, 09:24:22 AM: No such thing as a stupid question on here, i just pride myself on stupidish answers!
Title: Re: 500K Transmission Bearings
Post by: Seabeowner on February 02, 2017, 10:13:32 AM: Thanks for info on the bearings Bryan.
The US site seems at odds with some recommending replacing bearings here and there that may do more harm than good.
I've got two used spare needle rollers for my bikes that I'm keeping just in case.
Phil
Title: Re: 500K Transmission Bearings
Post by: Trigger on February 03, 2017, 07:27:00 AM: Quote from: Oddjob on February 03, 2017, 12:03:59 AM
I fail to see how replacing a bearing for a new one can do harm?

Typical yanks.

Did have a USA 500 in with no half rings, no grooved bearings not long ago.
Title: Re: 500K Transmission Bearings
Post by: Seabeowner on February 03, 2017, 01:38:06 PM: Quote from: Oddjob on February 03, 2017, 12:03:59 AM
I fail to see how replacing a bearing for a new one can do harm?

Typical yanks.
Some people are pretty ham fisted. + important to replace with bearings of at least as good quality.