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346

CB500/550 / Re: Head Oil Leak

« on: April 09, 2019, 10:04:07 AM »

Quote from: Johnwebley on April 08, 2019, 04:15:02 PM

When re torquing.slacken off first

Sent from my SM-G361F using Tapatalk

Thanks John
Thats what I thought was the correct procedure

347

Have a small oil leak definitely coming from head (suspect O rings between barrel and head)

This is a new replacement head gasket and O rings from a recent top end rebuild so its not an age thing

Trig did comment on a prior post that aftermarket O rings are often thinner than OEM so could cause this.

What I wanted to ask, is if it is worth just slacking off and re-torquing the head bolts (I know this is often a should do after a new head gasket and I didn't do it) before going the whole hog and installing OEM gasket and O rings.

Cheers

348

CB500/550 / Re: DVLA what's the point !

« on: February 23, 2019, 07:08:04 AM »

Same happened with my K0 sent photos, vjmc letter etc etc but needed an inspection.

Pain for me was that I could only insure for 1 month on VIN but luckily got the inspection done and plate issued just within the month before insurance ran out

349

CB500/550 / Re: Head o ring replacement

« on: February 20, 2019, 04:34:59 PM »

Hi Trig
Thats exactly it i think
Can you recommend o rings that will be ok

350

CB500/550 / Head o ring replacement

« on: February 19, 2019, 08:16:31 AM »

I have a slight oil leak that i am sure emantes from the o ring between the head and jugs

Is there any easier merhod to replace this without taking the head fully off

I suspect not but thought id ask in case there is an easy way

351

CB500/550 / Spotted on my travels - bit off topic but!!!

« on: January 02, 2019, 06:39:12 AM »

Spotted this on my travels in Hanoi, city of 5 million scooters

Nearly a Honda badge but not quite

Anyone seen anything like this before

352

CB500/550 / Tank flushing/cleaning

« on: September 07, 2018, 12:40:26 AM »

I am fitting a new petcock in a week or so and wanted to take the opportunity to give the tank a good clean out, any recommendations welcome as to how to get any low lying bits/shrapnel out

The tank is in good nick inside I just want to clean it out

353

CB350/400 / Re: carburettor overhaul and seized screws

« on: September 05, 2018, 04:07:46 PM »

I had difficulties with mine and sorted with a JIS driver !!

They are expensive but one of the best investments I ever made

VESSEL are a good brand, I bought this set and have never looked back

https://www.ebay.co.uk/itm/JIS-Screwdriver-Set-Vessel-Megadora-P1-P2-and-P3-12705-6-8/171753460588?epid=1342330113&hash=item27fd4dd36c:g:5ckAAOSwmCVY~LCG

I am assuming here you are referring to the 2 small screws that hold the needles in place at least this is on the 500, are they the same carbs on the 500. If so and you do need to replace they are an M3x10 screw - should be easy to find anywhere cheap

If you really cant get them out, personally I wouldn't sweat they only hold the needles and these should not wear. As long as you can knock out the emulsion tube and ensure all is clear. (Again this is 500 speak)

MOST important in my experience is Ultrasonic clean everything you will re-use, especially the carb bodies they have ver very small channels in them for the idle air circuit

354

CB500/550 / Re: advice needed

« on: August 25, 2018, 08:19:21 AM »

I can only recount my experiences

My 500 four came from US and was seized.

I tried every witches brew known to man I think and all to no avail and ended up cutting the chain to get the head off.

As to the pistons I found if you split the cases etc you can just get the big end bolts off and then pull the jugs off with the pistons and rods still on. This way you are dealing with freeing one piston at a time which is much easier if they are really tight. Mine we so tight I ended up having them pressed out in a machine shop. As to why they were so tight I never figured that out as the bores were perfect original spec and only needed honing.

As to chain I ended up using a split one from DS for long and complicated reasons due to a mistake I made on the rebuild and it has been fine. Many many folks do a chain replacement this way on a wide range of bikes with no problems. Of course endless always best but IMO splits are ok.

If I were you I would take the opportunity to do a full strip and check as others have suggested while you are in there in which case obviously go endless chain.

355

CB500/550 / Re: K&L petcock

« on: August 19, 2018, 09:20:59 AM »

Quote from: Trigger on August 19, 2018, 08:45:21 AM

Depends how long they have been sitting around for. The rubbers go off if they have been on shelves for years. I know this as some years ago i bought a job lot of old stock and sold them off one at a time. The first 6 came back before i realised that the rubbers had gone hard and leaked.
Why a new one ? Just rebuild the old one

The outlet pipe has come out of the body a while ago and I bodged with JD but it’s come off again so time for new I think the DS and K&L ones are not so pricey

356

CB500/550 / K&L petcock

« on: August 19, 2018, 12:49:15 AM »

Anyone used them, any good?

357

CB750 / Re: Getting cb750k on centre stand

« on: August 15, 2018, 09:47:44 AM »

Quote from: Green1 on August 10, 2018, 08:41:00 PM

Try a Triumph Trophy 1200 there a big top heavy bastard there's no way I can lift that in a dress and heals.

I concur it's all about geometry and mechanical advantage etc. I had a 1200 Trophy and fitted Lust lowering links as it was too tall for me.

Just that small change in height meant there was no way I could heave it on to the centre stand.

Solution I had the stand shortened by around 15mm and hey presto it was, I wont say easy but easier !! The Trophy is a 350Kg massive lump but I Still think the Triumph designers should have spent more time engineering better leverage geometry.

What I am saying in short is that small changes in ride height due to different shocks, tyres etc can have a really big impact on effort

358

CB500/550 / Re: Standard BZP bolt replacement

« on: August 13, 2018, 01:10:15 PM »

If you are not fussed about being completely original then INOX fasteners do kits if bolts for the 500. I have used them and their service is good.

http://www.inoxbolt.co.uk/zen/

359

CB500/550 / Re: Engine degrease and oxidation removal

« on: July 31, 2018, 04:20:04 PM »

I use Paraffin and a brush, wont shift oxidation but great for shifting gunk

360

CB500/550 / Re: Missfire at low revs

« on: July 30, 2018, 11:47:11 AM »

I have a pair of those aftermarket coils I never used as I went for Boyer full kit in the end

The mounting bolts are missing but sure that wont be a big challenge

PM me if you are interested

Honda-SOHC

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