Tutorial.Fitting XR600 cam chain tensioner

[micknmeld]

Here is an article I wrote for an Aussie trail riding site Welcome to Old Bull Trailriders, it may come of some use to someone here one day.


As most of you would know, if you work on motorcycles enough, motorcycle companies in their eternal wisdom, often require you to purchase a special tool to do a job. More than likely you may only have to use this tool once, so purchasing one is not really an option.
Honda are no different, as they expect you to buy a special tool to compress the spring on the cam chain tensioner in order to refit it.
Here is a simple and cheap method,to overcome the spring pressure so that the tensioner is easily fitted.
Firstly you will need a vice, a zippy tie (preferably white,I will explain this later), a scalpel and a small butane burner.

Firstly put the tensioner assembly in a vice and compress the spring, once you have the spring compressed, wrap a zippy tie around it and pull it up firmly, so it is positioned exactly like this:



It is important that you put the zippy tie on exactly like the picture above as it will aid in the cutting and removal of the tie at a later stage of the operation.

Once you have the spring compressed you can go ahead and fit the tensioner to the engine. It should drop easily into place if the spring is compressed enough. Slide the shaft through the tensioner and do up the grub screw to the makers torque specs or three grunts(whatever is easier). Once the tensioner is in place, be sure to have the tag end of the zippy tie hanging out of the engine, like so;



The next picture will show the tensioner in place with the zippy tie still holding the spring pressure.



Now comes the tricky part, releasing the spring pressure and removing the zippy tie from way down in the head. The reason a white tie is best is because it is kinda dark, down in the engine and a white tie is easier to see than a black one.

Now the butane torch and scalpel come into play, heat the scalpel blade until it is red hot,



Once it is hot, hold the tag end of the zip tie whilst carefully, seering through the zip tie with the hot blade. It will only take a second and the spring pressure will be released and the tensioner will instantly take up the slack in the cam chain with a audible “click”.




It is best to cut the zip tie right next to the ratchet block on the zip tie,that will enable the zip tie to come out in one piece, by simply pulling on the tag end of the tie.



Here’s hoping this technique helps someone one day, any questions, feel free to ask.
Cheers
Mick

[shuriken]

Great advise and tutorial.
Just about to strip my engine after finding what looked like my daughters gold glitter all over the sump screen!

[catteeclan]

Good idea that.

Great advise and tutorial.
Just about to strip my engine after finding what looked like my daughters gold glitter all over the sump screen!

You broke another one?

[shuriken]

hello mate.
The bike had been raced in hare and hound enduros and I think something is wearing out fast!

[micknmeld]

Great advise and tutorial.
Just about to strip my engine after finding what looked like my daughters gold glitter all over the sump screen!

Has it developed a rattle that can help pinpoint where the trouble may be??

[shuriken]

No. I needed to replace the gasket goo that was a temp repair in the side casing. Thought I'd take a look at oil screen in the bottom and saw it was partially covered in gasket goo and lots of gold coloured flakes. very small but definitely a break down somewhere. Oil starved i think? the bike had been raced by previous owner and i wanted to strip the engine down, just not yet!

[micknmeld]

Oil starved you say?? You might just get out of it with a new cam and some rockers. They normally are the first to go when the big girls starve for oil.
Good luck with it mate.

[shuriken]

thanks. the main filter is clean which i thought was a good sign....