Honda-SOHC

SOHC.co.uk Forums => CB500/550 => Topic started by: captaindonutbikes on March 10, 2010, 12:23:40 PM

Title: oil control valves fitting ?
Post by: captaindonutbikes on March 10, 2010, 12:23:40 PM

should one be up and the other down or both valves point up into  the barrels ? block is not fitting flush and wondered if on should be up (piston 1 side) and one pointing down (piston 4 side)

cheers   ???

Title: Re: oil control valves fitting ?
Post by: captaindonutbikes on March 10, 2010, 03:14:24 PM

sorted it cheers

 ;D

Title: Re: oil control valves fitting ?
Post by: captaindonutbikes on March 10, 2010, 04:27:08 PM

back open to discussion.   ???

Title: Re: oil control valves fitting ?
Post by: Bryanj on March 10, 2010, 05:02:53 PM

If you look into the dowel you will see one end of the restrictor is flat and the other is a small spigot---i think they are 750 ones pressed into the dowel. They fit with the flat  side up from memory but also i thought they had a stepped outer diameter and only went in one way round

Title: Re: oil control valves fitting ?
Post by: Yoshi823 on March 10, 2010, 08:26:12 PM

http://www.cmsnl.com/honda-cb550f1-super-sport-550-four-1976-general-export-mph_model17112/partslist/E04.html
 Is part #3 the bit that you mean?

Title: Re: oil control valves fitting ?
Post by: captaindonutbikes on March 10, 2010, 09:50:00 PM

indeed Tim, had to replace one and forgot which way round they go. according to the micro fiche the appear to go both the same way up into the barrels but when fitted the barrels wont sit flush down with the cases even with some gentle persuasion(!). tried reversing one and it fits but this would mean oil travel would be up from piston 1 side and pressurized down on piston 4 side(which in writing it i seem to have answered it ?

the oil flow up to the camshaft should be pressurized on both sides meaning the valves should be facing both up. perhaps some gentle honing is in order for the new valve

Title: Re: oil control valves fitting ?
Post by: captaindonutbikes on March 10, 2010, 10:32:20 PM

??????

Title: Re: oil control valves fitting ?
Post by: Bryanj on March 11, 2010, 07:23:31 AM

Is there anything left in the hole stopping the dowel going in all the way?

Title: Re: oil control valves fitting ?
Post by: Yoshi823 on March 11, 2010, 10:29:05 AM

Does the oil restrictor not fit into the top of the barrel not underneath?

Both are pressurised feeds to the cam as the overflow just flows down the cam chain tunnel.

Title: Re: oil control valves fitting ?
Post by: Bryanj on March 11, 2010, 02:23:00 PM

No Yoshi on the 500/550 the restrictors are a press fit in the crankcase/cylinder locating dowels as the oil path does not go up a stud as on the 750.

somewhere i have some NOS ones and if i can find them i will look at them

Title: Re: oil control valves fitting ?
Post by: SteveD CB500K0 on March 11, 2010, 03:05:10 PM

Here's a scan of the oil system from the Honda book.

Doesn't show the actual restrictors mind...

(http://www.nirvana-motorcycles.com/images/CB500%20Oil%20System.jpg)

Hi-res here (http://www.nirvana-motorcycles.com/images/CB500%20Oil%20System.jpg)

Title: Re: oil control valves fitting ?
Post by: Yoshi823 on March 11, 2010, 07:48:44 PM

I must admit it must be over 28 years ago since I last had a 550 in bits, whereas the 750/823 was apart regularly where I remember always checking that the restrictors had nothing blocking them before bolting the head back into place.

Title: Re: oil control valves fitting ?
Post by: captaindonutbikes on March 11, 2010, 08:35:32 PM

yeah, gave it a once over with some emery paper and managed to get it all flush.

just wanted to make doubly sure before i bolt it all down.

cheers for everyones help .
 ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D