1972 , 750 , Pulley alignment and wear inside of cover.

I've never had access to the starter clutch puller. I just remove the nut and give one quick stab on the starter. The starter clutch always drops off the taper and nothing has ever been damaged. Remove the unit as a whole with the freewheel and chain with startermotor sprocket.
 
hooksey said:
No,s off dynamo  831
               101  209  041
               EH  14V  11 A 9  ?
Click to expand...

this generator is stamped 330, not 831, and A19 not A 9,  but all the other numbers match ?
it's for a Nuovo Falcone, Guzzi.
Red could be right.  Interesting, the generator came from Serbia, i hear the Yugo army had a lot of Falcones?
 

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G,day Mark , thanks for posting up numbers on Dynamo

Do you mean the dynamo in your piccy came from Serbia ?
Because thats where the 750 came from too !

Well looks like im running with belt on the piss till I
come across a correct dynamo , or may have a look
at whether the pulley can be shimmed out to run square

Hooksey
 
Sorry guys but a wrong dynamo still can't explain why the crank end nut is touching the cover!
BTW, the correct OEM number is 0 101 209 031.
 
Jlo , I have filed the shoulder of the crank nut back to the face of the crank end ,  .5mm
so this will stop the rubbing inside cover 

Unless the crank is floating  :-\

I will check with PO if crank has been worked on.
 

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Hooksey, as soon as I'll get back home, I'll take some measurements for you.
 
Hey Hooksey,

Bought the freewheel new from Ricardo Oro. It looked to me like an aftermarket product. Came loose once, two seasons earlier, hence the marking on the cover. Tightened it back and had no problem since.

Dynamo is from Guzzi indeed, NOS, just milled off the holders. Have a dozen more in case anybody needs one.

Boba


 

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Sounds like you've got the answer now Hooksey!

Just measured my crank/cover gap.  There's about 2.5mm between the crank nose and inside of the cover.  The nut itself sits 1mm lower on the end of the crank (so it's not flush).
 
Just checked the measurements for confirmation, taken from starter freewheel pulley centreline to cover face, and from crank end to cover face.

 

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Thanks for that info Boba the fog is lifting,

Jlo those measurements help heaps , i have the same cover face to centre pulley measurement 40mm .
but from cover face to crank end is 60mm !

Is someone able to measure from the Dynamo face to the centre of pulley ? I have  24mm !
Those Guzzi dynamo,s also have a locating hole for the holding strap.

Can the crank be turned down ?  (filed ) I have minimal clearance to the cover as it is now .

Scott i will look at moving the complete Dynamo to give me a square running belt .

Thanks Fellas.
 
Hooksey

I don't have a 750 to look at, but just trying to make sense of the info submitted so far.

1. Brad has 2.5mm clearance between the end of the crank and the inside of the cover, and his shaft protrudes 1mm beyond the nut. So there is 3.5mm clearance between the nut and the cover.
2. Your shaft doesn't protrude beyond the nut.
3. JLO has 56mm from the cover mating face to the end of the crank.
4. You have 60mm to the end of the crank.
5. Your crankshaft pulley is in the correct position on the tapered shaft (your and JLO's 40mm measurements match)

Considering all of the above, a likely conclusion is that someone has installed a non-standard nut on your crankshaft, or a non-standard washer behind it. Before you filed it down, your nut/washer combo appears to have been 4mm thicker than it should be (JLO's 60mm minus your 56mm). Filing 0.5mm off it brings its "over-thickness" dimension back to 3.5mm, which gives zero clearance inside the cover (see point 1 above). But the fraction of a millimeter that your nut has already milled off the inside of the cover actually gives you a bit of clearance. If you want to give it a bit more room, get a thinner washer or take off another millimeter or two off the nut.

It would be interesting to confirm all this speculation by having you guys measure your nuts  ;)

Cheers,
Cam
 
Cover is closed again... I'd say that whatever the nut he could have, the most important is that it doesn't touch the cover anymore and that the freewheel is fully seated.
 

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Cam , My nut is flush with the crank end now , so to get more clearance
on cover i would have to take material of crank too ..

Dont think i will take verniers to my nuts bit cold ere !!  :o
 
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