750 freewheel

[sergio750sf]

Hi you all

On my 750 SF the freewheel nut loosed so the key broke and the two cones ( crankshaft and freewhell) are damaged.
I need to replace the freewheel.
Is there anybody who have such a part in good condition ?
I think mine is repairable but I need to know the precise angle of the cone, somebody can help ?

Thank's for your help.

 

[Tippie]

You should be able to easily get hold of a freewheel. I wouldn?t try to fix yours by removing metal as it will sit further in and the chainwheel may have insufficient clearance.

 

[gpacs]

DAM Classic Racing offers an exchange service where you send us your old part to be refurbished, and we immediately ship a refurbished item.
https://damclassicracing.com.au/40701001-1-starter-clutch-750-assy-refurbished-in-exchange/
If you don't wish to send your old part, or it is uneconomical to do so, then there is a 'no exchange' price also.

It is important to be aware that there are some New and/or Refurbished items around that sit too deep as Tippie has mentioned. We check each one before shipping.

If your Starter Clutch is not too badly damaged, and in good repair in all other repects, it may be best to take it to an engineering shop to have the taper cleaned up. Then offer it up to the crank and check the clearance to the Freewheel, 0.5mm is absolute minimum, a new item often has up to 2mm or so.  Note the woodruff key is not what holds the starter clutch from spinning, the taper does that job and the woodruff key is only for location.

All the individual parts for repair are available https://damclassicracing.com.au/categories/engine-covers/starter-clutch-1.html

 

[Dellortoman]

If the scoring isn't too bad, try rubbing the shaft and inside of the freewheel with emery cloth. Might take enough of the high spots off for it to sit OK on the taper again.
It would make the job easier if you use wooden formers for the cloth. A tapered peg for the hole and flat piece of wood (used like a file) the rub down the shaft taper.

 

[Tippie]

The bush mechanic?s trick was to lap it in with valve grinding paste. On one of these mega trips on our infamous RT2s our mate on the third one had the flywheel loosen and take the key with it, a side of the road job up near Townsville. We mixed salt and toothpaste as a medium and taking it in turns to either hold the flywheel in place or kick it over got the surfaces good enough that it fixed it. Not so easy with an SF though.

 

[Paul Marx]

I have some freewheels for sale just in case.
Paul

 

[Ernesto]

The bush mechanic?s trick was to lap it in with valve grinding paste.

That's how I saved my crank's end after an incident with the key.
Used an old freewheel for it.

Ernesto

 

[piranha-bro2]

If you use the freewheel that will be used with it the surfaces would mate better. Either way it probably works.