Help req: diameter/thread yam FZR600R sprocket??

[xjrsommsi]

oi mates,

please- need the dimension of the front sprocket nut thread of an fzr 600r (´94 vintage; type 4JM).

M ?? x thread lead (e.g. M16x 1.5)

previous owner has welded a one-off spacer onto the output gear shaft....i´ve removed that crap now with a dremel due chain replacement& want to recut the thread.

cheers,

freddy

[xjrsommsi]

ANSWER:

I´ve found the required measurements, already:

M18 x 1,0; head size 32mm.....

for any further interests.

freddy

[szrdave]

Good you got it sorted! Aparently it's not uncommon on the FZR400/600 for the nut to loosen and jump off the end of the shaft, it happened on my 400 locking the rear wheel as I was going down hill!

The fact the previous owner had left the tab washer off probably didn't help, so in the interests of safety I fitted a jubilee clip until a suitable replacement could be found

[Evilchicken0]

I was going to say there's a tab washer ... oh and the model is 4JH

[xjrsommsi]

....yupp guys,

thanks for the feedback- know about the issue with the suddenly flying object, previous known as sprocket retainer nut ;o), have read about that in the fzr forum as well. but i was really pissed off, finding out that my "new used" toy has a welding on the shaft.

i´ve already ordered the proper "special retainer shim", which holds the nut in place...and probably will also do a drill in the centre of the output shaft, cut a thread into and make an additional one off shim, preventing going the stuff loose. loctite is on the must do list as well.

cheers,

fred

[Evilchicken0]

I'd just fit the "special retainer shim" after that it's getting a bit overkill and a hole through the shaft might weaken it, (not to the point of failure but it's something I'd avoid)