cam chain tensioners

[Wingedwheel]

I’m getting ready to install the type E on my ‘76. I have everything I need except the highlighted gasket. Parts list shows I need 2? unless I’m seeing it wrong, why would I need two? Also can I just make my own gasket or is it more like a fiber washer?

 

[5twins]

It's actually a copper sealing washer, and I'm not sure why the parts diagram calls for 2 (a mistake probably?) because you only need one.

 

[Wingedwheel]

Thanks for that clarification 5T but what size is it? Can I use an O-ring?

 

[Jim]

Copper. It only takes the one.

 

[Wingedwheel]

I’m assuming it’s an 18mm?

 

[5twins]

The only measurement I know off hand is that it's about 1mm thick. The O.D. and I.D. shouldn't be hard to figure out though. Looking at Jim's pic, you can see the O.D. is about the same as the round portion of the lock nut. The I.D. will be slightly larger than the screw diameter.

 

[5twins]

It seems this same sealing washer is used on many Yamaha outboard motors, and they charge much less for it, lol .....

https://www.ebay.com/itm/1653038217...HfzqnXMsH0+y91CS5bCF0PRjZ+|tkp:Bk9SR_7t1YWtYw

 

[Wingedwheel]

Thanks 5T I ordered the 18mm washers off Amazon for $10 with free shipping so I did ok except I’ll have 30 of them. Anybody need one? lol.

 

[Wingedwheel]

Now that I think about it I am probably getting plated Chinesium washers. Probably send them back and order the right ones.

 

[Its been a long time]

Now that I think about it I am probably getting plated Chinesium washers. Probably send them back and order the right ones.

Worth seeing if they stick to a magnet before deciding to send them back?

 

[Wingedwheel]

They’ll be here tomorrow. We’ll know then.

 

[gggGary]

I've gotten plenty of gen u wine copper washers from CHINA.

 

[Wingedwheel]

Well, I was surprised, passed the magnet test and cut one in half. All copper so I’m ready to go..

 

[grouchie77]

Soooooo I have the type D. Could an enterprising machinist just make his own locknut to "convert" the assembly to a "type E"?

I really want to try this. If anyone can provide some basic dimensions of the locknut, I would appreciate this. The overall length (or thickness) should be the only thing I would need. All the other dims I can figure out myself.

 

[Wingedwheel]

I did the conversion. You have to replace the plunger with the longer type and I believe this is the nut I used.
https://yamahaxs650.com/product/nut-late-cam-chain-adjuster/

 

[grouchie77]

Why do I need to replace the plunger? All I really need is the extra thickness the locknut provides to keep the acorn nut from bottoming out on the threaded shaft.

 

[gggGary]

Soooooo I have the type D. Could an enterprising machinist just make his own locknut to "convert" the assembly to a "type E"?

I really want to try this. If anyone can provide some basic dimensions of the locknut, I would appreciate this. The overall length (or thickness) should be the only thing I would need. All the other dims I can figure out myself.

cam chain adjust lock nut dimensions thread pitch plunger
First photo 5twins

This plunger is just a random one in a bag of adjuster parts. pitch gauge sez 1.5

 

[5twins]

You need the longer plunger because it allows the adjuster screw to stick out more while applying the same amount of tension, and that provides the needed room for the lock nut. Details are here in my post #22 .....

https://www.xs650.com/threads/cam-chain-tensioners.1056/page-2

Now normally, you don't find just the long plunger for sale on eBay, so you end up buying a whole assembly. But they can be had for $20 or less if you shop around and are patient.