SOHC.co.uk Forums > CB500/550

Bolts - buy from official sources (DS, CMS) or source them other places?

<< < (3/4) > >>

Laverdaroo:
All the JISs Rees are available but you might have to shop between DSS & CMSNL AS NEITHER CARRY ALL OF THEM. I had to get the longer JIS ones from silvers but some others from CMS. Dear but correct and come in 48hrs. Spot on


Sent from my iPhone using Tapatalk

Oddjob:
Personally I have no idea why people think it's a good idea to fit screws which back in the day we couldn't wait to get rid of. Plus, they are willing to pay through the nose for the privilege. They weren't nicknamed putty headed screws for no reason. Far better alternatives available today.

AndyD:
Evening all,
Been away from the bike shed for a while but trying to get back to it soon and been interesting to catch up on some threads on here.

One good source for JIS screws I used was -  https://www.zed-parts.com/j-i-s-fasteners - seemed to have a good range of sizes and reasonable prices.

What I've found really annoying is buying original fixings at stupid prices and then what you get look nothing like the originals - Suzuki seemed bad for this as the new bolt heads were totally different.

Not sure I'll do (m)any original restorations from now on as cost just silly and getting so hard to source real parts - might be more fun just refurbishing what's there and using whatever fixings etc. look nice instead.

Cheers,
Andy

alexdecker:

--- Quote from: Oddjob on January 30, 2023, 06:42:31 AM ---Any Honda dealer will order the modern ones for you. They use a very simple part number system, for example a flanged 8mm headed casing screw 32mm long by 6mm is part number 96000-06032-00. The 96000 part is the identifier of that type of bolt, 06 is the diameter of the bolt and 032 is the length, the 00 part is the colour generally. Some of these bolts are black so you’ll see that part change to reflect that. So if you want a 6 x 28 bolt you just change that part, so it would be 96000-06028-00. Measure an existing JIS screw and then see if the equivalent is available in modern Honda ones, some of the clutch case casing screws on the 550 for instance are quite long, one is 75mm and one is 80mm so try searching for 96000-06075-00 and 96000-06080-00 for instance to see if Honda made them that length, which after searching I can report they did.

It’s generally much cheaper though to buy a job lot off a breakers and just order the hard to find ones if you need any.

--- End quote ---

This is marvellous information!

Potentially stupid question, but how do you decide when to replace with flanged hex head, normal hex head or a third option?

Also, do you use zinc plated instead of stainless steel?

Oddjob:
Use flanged 8mm headed bolts from modern Hondas on all casings. The flange spreads the load and stops the bolt digging into the alloy.

As for other bolts, if it had flanged originally then replace with flanged, engine bolts are often flanged, especially the ones on the top of the casing. If you can't find flanged in the correct size use a washer underneath the head so the nut doesn't dig in as it tightens.

Engine hanger bolts tend not to be flanged, use normal bolts for those if you like but make sure you also fit a washer under the head and a washer and spring washer underneath the nut. Also grease them well to stop them binding/rusting into the frame hole. Especially critical on the ones going through the crankcases, like those under the engine and at the front of the engine.

If fitting stainless then try and source bolts which use the correct size head if at all possible, don't forget as well that Honda had a nasty habit of changing the thread pitch on some bolts, not a huge problem where you're also replacing the nut but bolts which go into threaded holes for instance need to be checked for thread pitch, 6mm bolts/screws tend to be 1.00 pitch, 8mm are usually 1.25 pitch but some 10mm bolts are 1.5 pitch not the 1.75 that's usually supplied, they are called metric fine bolts. Same go for nuts fitting to studs, check pitch before ordering. Rear sprocket nuts for instance are 1.5 pitch not 1.75. Bottom fork yokes are metric fine as are caliper bolts.

I use https://www.stainlessmiddleton.co.uk/ for my stainless as they are highly polished with no writing on top of the bolt head, he also does 12mm headed 8mm bolts instead of the more normal 13mm head. Same for 10mm, he also does 14mm headed bolts instead of the usual 17mm. Don't forget, if in doubt measure pitch first or ask for advise on here.

You can see the modern Honda bolts used in this pic, on the generator cover and also on the camshaft cover.

Navigation

[0] Message Index

[#] Next page

[*] Previous page