Front sprockett question

[SueScott1]

Whilst out riding, the front sprocket securing nut came off and damaged the splines and threads. Has this problem happened to anybody else and how did you solve it please? Also, where is the best source for replacements parts?
Thanks, Sue

[SueScott1]

PS the bike is a 2003 Fazer 600

[Punkstig]

Common problem with this model, unfortunately it was preventative by replacing the standard 9mm nut for the updated 12mm one.
I don't have the product number to hand but it is on many posts on this forum.
Hopefully if the drive shaft thread isn't overly damaged the new nut could help cut the thread, if not you're looking at welding the nut/ sprocket onto the shaft which can only be done a couple of times before its a case of replacing the drive shaft!

[jason1]

: http://www.wemoto.com/bikes/yamaha/fzs_600_fazer/98-99 for 12mm upgrade or local Yam dealer 

[Punkstig]

£5.93 from wemoto but only £2 something from yam. Dealer! 
What else does wemoto overcharge for?

[noggythenog]

 
Hi Sue, gutted to hear your story! , it is such a common topic on this site & unfortunately all those that arent members of  Foc-u rarely know about the issue until it is too late.
as discussed by the others, hopefully the shaft isnt beyond purpose & the updated nut goes on ok but personally if theres a small glimmer of hope of this being the case i would take the bike to a well trusted garage or engineering outfit along with the new nut just to make sure otherwise trying to bodge it on yourself may not work.
Stick around on the site, it's a great place, keep us updated on your progress.
 
cheers
fras

[midden]

when you say 12mm instead of 9mm I take it to be the thickness of the nut?
mine is probably the original so best get to dealer to make change.
is the front sprocket simple to get to?

[unfazed]

Whilst out riding, the front sprocket securing nut came off and damaged the splines and threads. Has this problem happened to anybody else and how did you solve it please? Also, where is the best source for replacements parts?
Thanks, Sue

Take a look here
http://foc-u.co.uk/index.php?action=downloads;sa=view;down=43
and here
http://foc-u.co.uk/index.php/topic,4546.0.html

[jon]

is the front sprocket simple to get to?

Yup, just whip the sprocket cover off!

[chaz]

yes it happened to mine, a FZ6, got a new nut but the thread had worn, so just nipped it then had it welded, it wont come off now, lol, could grind it off when it needs a new sprocket, hope to get 25,000 miles out of the new set I put on, and maybe re weld one more on by then the bike will have done 75k, and I'll have hung up my riding boots?

[midden]

cool, cheers jon, wasn't sure if it was the whole side case with gear lever removal necessary.   

[midden]

has anyone ever tried using loctite?

[chaz]

£5.93 from wemoto but only £2 something from yam. Dealer! 
What else does wemoto overcharge for?

I paid over £16 for a nut and lock washer for my FZ6 from the yam dealer in York, did they see me coming ?

[midden]

http://yambits.co.uk/fzs600-fazer-sprocket-lock-tab-front-p-6429.html

[midden]

Sorry to drag this on but just called yamaha dealer regards getting the replacement nut for mine. when they said it would have to be ordered in I made point of ensuring it was the upgraded larger nut. I was then passed to the technician  who told me they stock an upgraded lock washer to use with the original nut (if undamaged) and to clean shaft and  apply loctite.
Any thoughts........is the technician to be trusted.........is anyone to be trusted these days lol 

[CRH]

do what everyone else on here will tell you....12mm nut clean threads well use loctite ,torque to 90nm (think thats the new setting)...

[red98]

hi sue...depends on the extent of the damage...ive just repaired one which was damaged on the end,i removed the sprocket and started the bike up in gear and used a fine file and put a bevel on the end of the shaft....then eased the nut on with plenty of grease at bit at a time,1 turn on,3/4 turn off etc... removing the nut every now and again to clean and re-grease........dont forget your risk assesement 

[midden]

I've always found a little fine valve cutting paste good for cleaning/repairing threads  using the turn on turn off method suggested by Red

[red98]

I've always found a little fine valve cutting paste good for cleaning/repairing threads  using the turn on turn off method suggested by Red

 
 
top tip MIDDEN......if theres any pipefitters out there a drop of cutting fluid will also help 

[slimwilly]

Chuck it in the bin and buy a Thou 

[VNA - BMW Wank]

Chuck it in the bin and buy a Thou 

Yup that's what I did.

Happened to my 99 600 in 2003.  I bought the bike new, then in the summer of 2003 noticed a strange noise from around the front sprocket.  Nut and tab washer were loose and totally mashed.  It had done about 24,000 miles I think, over 20,000 anyway, and was still on the original chain and sprocket set.

I tried to clean up the O/P shaft threads with the appropriate thread file but they were pretty much flattened down.  I got a new tab and nut, but it just gave when I torqued it.

So got the arc welder out and on it went with three big spot welds.  Continued to ride for a few months and then put it away for the winter.  Towards the end of the winter in 2004 it got traded in against a zero miles pre reg thou.

Every spring I pop the cover off the thou and have a peek.  When I replaced the front sprocket the tab was well bashed doon and stud lock was applied to the threads before running the nut on and torquing. 

[fazersharp]

If I may please link up my thread from last week as I was told that the 98 fazers had no issues here  http://foc-u.co.uk/index.php/topic,9738.0.html and this thread has a good photo of both nuts http://foc-u.co.uk/index.php/topic,3710.msg73858.html#msg73858