Honda-SOHC

SOHC.co.uk Forums => CB500/550 => Topic started by: sam_vfr on February 17, 2016, 03:04:13 PM

Title: Fork and Engine oil
Post by: sam_vfr on February 17, 2016, 03:04:13 PM: What the title says, what fork and engine oil would people recommend for a CB550 K3?

If it makes any difference for the fork oil, I weigh around 80kg's

Just looking for some feedback as I've read a lot of different things!

Thanks

Sam
Title: Re: Fork and Engine oil
Post by: Bryanj on February 17, 2016, 04:40:59 PM: Tesco diesel MINERAL 10w40 for the engine and 30 weight fork oil
Title: Re: Fork and Engine oil
Post by: totty on February 17, 2016, 10:50:13 PM: I'd go lighter on the fork oil, I found 30 over damped and dropped to 20. Although I've seen a website that showed how much it differed by brand so there is a bit of pot luck in it.
Title: Re: Fork and Engine oil
Post by: Bryanj on February 18, 2016, 07:16:40 AM: Sorry not good with these new fangled metricated numbers just worked out that that is a lot lighter than me so yes 20 weight, one i use most is i think Rock oil
Title: Re: Fork and Engine oil
Post by: deltarider on February 18, 2016, 07:36:07 AM: Recently I changed fork oil from 10W to 7,5W (Shell Advance) which is about ATF weight. ATF was what Honda prescribed back then. By comparing partsnumbers I discovered that my model CB500 has in fact the same fork legs as the CB550K2, so instead of 160 cc I filled them with 145 cc.
As long as you don't operate your motor around zero degrees, 15W-40 is maybe a better choice than the all temperature 10W-40. Honda France prescribed even 20W-40.
Title: Re: Fork and Engine oil
Post by: TonUp on February 19, 2016, 03:49:23 PM: I changed the fork oil on my CB550F2 to 5w30 engine oil - the forks are much better and work very well.
Title: Re: Fork and Engine oil
Post by: flatfour on February 19, 2016, 04:40:17 PM: I just use ATF for the forks, as we did in the 1970's and Putoline DX4 10w/40 for the engines in winter and the same brand but 20w/50 for the summer.