Z1 Crankshaft v's later (J) Crankshafts

[Garn 1]

I would like to be able to identify a Z1, Z1A, Z1B, Z900, Z1000A1 & A2 crankshafts from later models [J model] cranks.
The things I know are that the Z1 series crankshafts:
Have 15 teeth on the crankshaft centre sprocket.
They have a keyway slot on the rotor taper. (not 100% sure about Z1000A1 & A2.)

What else should I look for?
How many teeth have later cranks?
The later cranks have shorter con-rods and lower crank-pins in pistons (I learnt this from a posting yesterday!)
Any help would be appreciated.
RegardZ.

[chrisu]

z1000 have not got a woodruff key slot
later mk2 cranks have more teeth (i think)
don't Js have hyvo chains ?

[london calling]

Yes Chris 'J' and GPz cranks are hy-vo.

[Keefleaf]

The crank weights/pork chops vary.Early ones are "pork chop"shape,
later Z1000 are circular.There`s a bit more too it than that but that`s the best I can do right know.

[zed1015]

Z1/Z9 cranks and subsequent z1000's with round camcover all have 15t on crank with matching 30t cam sprockets. Early z1 and 9's have lighter (porkchop) crank. Some have keyway, some not but are all interchangable with no other mods. Later mk2 /st with square camcover have 16t on crank and fatter alternator taper, these will fit early motors but you must use matching 32t cam sprockets and corresponding alternator rotor. All are roller type camchain... J and gpz cranks are hy-vo (silent) type camchain ... For identification purposes all this is presuming you are dealing with standard unmodified engines as all parts are interchangable throughout the range with a small amount of work. i.e you could easily come across an early 9 motor with a mk2 or jeep crank , any model head and a gpz gearcluster fitted.

[Garn 1]

Thanks Guys.
I guess mainly what I was after, was the difference in teeth.
So if it has 15 teeth on the crankshaft and not 16 teeth, I should be Ok to pick the right one. I can live with a taper without a keyway.
Regardz

[02GF74]

what is this hy-vo silent chain you speak of? sounds good - can it be fitted to standard Z1000 A1 engine?

[Pigford]

The Hy-Vo type chain is not a roller chain! Totally different & not compatible or inter-mingle-able

Its a series of flat plates linked, with a recess under which fits the sprocket.

You can convert cams to run either type by changing the sprocket....

[paul doran]

and it can be tricky to set the cam timing

[Al]

Hy-Vo fitted to models after 1980 i believe.

As Paul says its a begger to set the cam timing because they jump teeth just as soon as look at them.



The funny looking bendy bracket is used to hold the chain close to the sprockets whilst setting up.



They run on slipper blades as opposed to toothed gear wheels and the barrel, head, crank, cam cover and crankcase mouth is different to be able to accept them.





http://s254.photobucket.com/albums/hh86 ... 20dialler/



AL