Clutch push rod question ?

[McCabe-Thiele (Ted)]

There is one listed on e bay in 3 pieces!

[Nurse Julie]

They are a 3 section rod on later ones or all one section as Ash has explained. They usually break in two parts as the chain hits it.

Yours is a common problem with the seal cutting in to the rod, which will cause the oil to weep past the seal. Have loads of rods that look the same as yours .


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[AshimotoK0]

here ya go ted £12.50 delivered (worth asking for more pics though to see any marks better)

https://www.ebay.co.uk/itm/185560330371

Note 323 part no. 

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[Rozabikes Tim]

They are a 3 section rod on later ones or all one section as Ash has explained. They usually break in two parts as the chain hits it.

Yours is a common problem with the seal cutting in to the rod, which will cause the oil to weep past the seal. Have loads of rods that look the same as yours .


(Attachment Link)

Is it brain fade or did someone  (Graham maybe) get some made as specials?

[Oddjob]

That's broken Ash, no metal part on one end and it should have metal parts on both ends. The end missing is the end which Ted has all the corrosion on.

There is a modern Honda which uses a push rod of the same diameter but it's slightly longer, I'm looking at using one of those when or should I say IF I can do an hydraulic clutch conversion, however it may be able to be adapted for use as a normal push rod. I'll take some measurements and see. It's also 3 parts, one long rod with 2 metal ends.

[Sesman]

I wonder if an old british dural push rod could be adapted to work🤔

[Oddjob]

It's all about the diameter I'd imagine, it needs to be the exact same as the 500 or the seal won't seal.

[K2-K6]

They are a 3 section rod on later ones or all one section as Ash has explained. They usually break in two parts as the chain hits it.

Yours is a common problem with the seal cutting in to the rod, which will cause the oil to weep past the seal. Have loads of rods that look the same as yours .


(Attachment Link)

Is it brain fade or did someone  (Graham maybe) get some made as specials?

Similar thought from me. Seem to recall "silver" steel used, that's a ground to diameter stock heat treatable steel, and so suitable for something like this if bought in correct diameter. You could heat and quench the ends to harden after shaping them to correct radius.

[AshimotoK0]

That's broken Ash, no metal part on one end and it should have metal parts on both ends. The end missing is the end which Ted has all the corrosion on.

There is a modern Honda which uses a push rod of the same diameter but it's slightly longer, I'm looking at using one of those when or should I say IF I can do an hydraulic clutch conversion, however it may be able to be adapted for use as a normal push rod. I'll take some measurements and see. It's also 3 parts, one long rod with 2 metal ends.

whoops .. how about this one Ken?

https://www.ebay.co.uk/itm/385439436435

[AshimotoK0]

They are a 3 section rod on later ones or all one section as Ash has explained. They usually break in two parts as the chain hits it.

Yours is a common problem with the seal cutting in to the rod, which will cause the oil to weep past the seal. Have loads of rods that look the same as yours .


(Attachment Link)

Is it brain fade or did someone  (Graham maybe) get some made as specials?

Similar thought from me. Seem to recall "silver" steel used, that's a ground to diameter stock heat treatable steel, and so suitable for something like this if bought in correct diameter. You could heat and quench the ends to harden after shaping them to correct radius.

If you want a plain steel one you can use a 5 speed CB450 twin one but for some reason Honda lightened that part on the late 500K0's etc to a composite of alloy and steel combo.

[Oddjob]

That's broken Ash, no metal part on one end and it should have metal parts on both ends. The end missing is the end which Ted has all the corrosion on.

There is a modern Honda which uses a push rod of the same diameter but it's slightly longer, I'm looking at using one of those when or should I say IF I can do an hydraulic clutch conversion, however it may be able to be adapted for use as a normal push rod. I'll take some measurements and see. It's also 3 parts, one long rod with 2 metal ends.

whoops .. how about this one Ken?

https://www.ebay.co.uk/itm/385439436435

That ones fine Ash.

[Seabeowner]

They are a 3 section rod on later ones or all one section as Ash has explained. They usually break in two parts as the chain hits it.

Yours is a common problem with the seal cutting in to the rod, which will cause the oil to weep past the seal. Have loads of rods that look the same as yours .


(Attachment Link)

Is it brain fade or did someone  (Graham maybe) get some made as specials?

Similar thought from me. Seem to recall "silver" steel used, that's a ground to diameter stock heat treatable steel, and so suitable for something like this if bought in correct diameter. You could heat and quench the ends to harden after shaping them to correct radius.

That's what I've been using for about 10 years. Had it made and treated at work. I also have a solid CB450 one, but have never tried it. I do notice that clutch bite point changes from cold to hot and thought it must be different expansion rates of engine and rod,
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[AshimotoK0]

Whats all this then .. DS for 11 quid ??

https://www.davidsilverspares.co.uk/CB450K2-SUPER-SPORT-1969/part_334320/

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[AshimotoK0]

Pretty sure they would clean up OK...only surface corrosion by the looks of it

[McCabe-Thiele (Ted)]

That's been on the DS site for a while iirc - unless they have a box of NOS rusted ones.