Correct engine oil please Honda CB 250 RS 1981

St George · Borekit Bruiser Joined: 19 Feb 2019 Karma :

Cannot find which oil I need for the engine, not even in the owners manual or selling on ebay. The 250 twins seem to have 10-40 Synthetic, can someone confirm please. Thanks.

Howling Terror · Super Spammer Joined: 05 Dec 2008 Karma :

St George · Borekit Bruiser Joined: 19 Feb 2019 Karma :

Thanks for that. Got some in the cave.

Robby · Dirty Old Man Joined: 16 May 2002 Karma :

Really, whatever you can find in the shed will be adequate. From the book, you could technically run them on straight 30 weight oil for the UK climate.

jaffa90 · World Chat Champion Joined: 06 Apr 2016 Karma :

This looks the business,
https://www.ebay.co.uk/itm/Shell-Advance-AX7-10W-40-4T-Motorcycle-Engine-Oil-Semi-Synthetic-4-Litres-4L/252707967332?epid=24017001895&hash=item3ad6919164:g:yFAAAOSw4CFYquN3:rk:7:pf:0

What about the filter?

Robby · Dirty Old Man Joined: 16 May 2002 Karma :

No filter on the CB250RS, just a wire mesh under the clutch cover.

stinkwheel · Bovine Proctologist Joined: 12 Jul 2004 Karma :

Howling Terror · Super Spammer Joined: 05 Dec 2008 Karma :

..to add; Get a magnetic sump bolt....every little helps.
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Shaft · World Chat Champion Joined: 27 Dec 2010 Karma :

Polarbear · Super Spammer Joined: 24 Feb 2007 Karma :

Robby · Dirty Old Man Joined: 16 May 2002 Karma :

1000 mile oil changes are important. I used a little quick-drain tap for a drain plug, because if I was doing oil changes that often I would definitely end up killing the threads on the drain plug. It does help that the drain plug screws into the crankcase cover, which is easily replaced.

The gauze filter needs to be cleaned occasionally, but it doesn't really catch all that much. It has fairly big holes.

stinkwheel · Bovine Proctologist Joined: 12 Jul 2004 Karma :

I would recommend fitting a bonded seal (dowty) washer to the sump plug in place of the aluminium/copper crush washer, then you just need to nip it up to be totally oil tight.

In fact, I'd recommend it for all bikes.
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St George · Borekit Bruiser Joined: 19 Feb 2019 Karma :

I cleaned the standard surfaces and used the blue jointing compound the day before I put the oil in. Oil tight. The bike will go on ebay in any case to make room for others in the wings. Thanks for imput.