Service bulletin on GSXR?

[V2Rider]

There is rumor that American Suzuki released a bulletin in April that the torque setting of 67.5lbs on the rear sprocket nuts are wrong, and should be 43.5 lbs. Ive talked to almost all minnesota dealers, they are all using 67.5. Any info from others around the states?

[IrocRob]

That's the first I've heard of a Suzuki manual being wrong on this issue,
but I've seen Yamaha manuals recommending even more torque for
sprocket nuts. That is way too much for a 10mm thread.

I'd use 42 lb/ft with some medium duty LocTite.

[SPL170db]

Originally Posted by V2Rider

There is rumor that American Suzuki released a bulletin in April that the torque setting of 67.5lbs on the rear sprocket nuts are wrong, and should be 43.5 lbs. Ive talked to almost all minnesota dealers, they are all using 67.5. Any info from others around the states?

I don't know about every other GSXR out there, but it is definately true for the K5/K6 1000. I remember jeffw (he works/worked at Olathe Suzuki) on GDC posted this a while back.

The bulletin from Suzuki was dated 6/05, he had a copy of the document posted on his website www.jsdproducts.com but it doesn't appear to be there anymore.

[CBRBob]

I believe the K6s are being recalled for defective ISCs.

[V2Rider]

Originally Posted by IrocRob

That's the first I've heard of a Suzuki manual being wrong on this issue,
but I've seen Yamaha manuals recommending even more torque for
sprocket nuts. That is way too much for a 10mm thread.

I'd use 42 lb/ft with some medium duty LocTite.

If ive had my sprocket nuts at 67.5 and loosen them to say 45lbs, are they going to hold as well? I mean, is the aluminum going to be "stretched" per say? Or will backing them off, and retightening them at 45 with locktite good enough? I dont want to end up with a wobbly sprocket, you know what I mean?

[SPL170db]

Originally Posted by CBRBob

I believe the K6s are being recalled for defective ISCs.

K7 1000 had this issue, as well as improperly fitted stators.



V2Rider, just remove the nuts, dab some loctite on them and retorque to the proper specs and it'll be fine.

[IrocRob]

The nuts and bolts (studs) are steel, right? They should be fine.

Just pay attention as you remove the nuts. If the nuts do not spin freely
after being loosened then the threads may have been damaged already.
If this is the case, replace the nuts. If the new nuts do not spin freely on
the existing studs, replace the studs as well.

[V2Rider]

Originally Posted by IrocRob

The nuts and bolts (studs) are steel, right? They should be fine.

Just pay attention as you remove the nuts. If the nuts do not spin freely
after being loosened then the threads may have been damaged already.
If this is the case, replace the nuts. If the new nuts do not spin freely on
the existing studs, replace the studs as well.

I would have to replace the whole drum. Im not sure whats steel and whats aluminum Its one or the other. I will have to look inti it. Hopefully the nuts are aluminum, but I doubt that

[CBRBob]

Originally Posted by V2Rider

I would have to replace the whole drum. Im not sure whats steel and whats aluminum Its one or the other. I will have to look inti it. Hopefully the nuts are aluminum, but I doubt that

Drum, aluminum nuts? No.

Typically all you need is a magnet. If it's Al, it's not magnetic(unless it's Ti, but not likely). They wouldn't wobble if they were 10lb/ft. loosen then, retighten to stock specs. $0ish sounds correct, 80ish sounds right for the rear axle nut.

[Mike295]

who actually torques their rear axle nut... just go really tight and back off a little to line up the pin. blamo

[V2Rider]

Originally Posted by mike295

who actually torques their rear axle nut... just go really tight and back off a little to line up the pin. blamo

Your on the wrong subject. Were talking about sprocket nuts

[SPL170db]

Originally Posted by V2Rider

I would have to replace the whole drum. Im not sure whats steel and whats aluminum Its one or the other. I will have to look inti it. Hopefully the nuts are aluminum, but I doubt that

The sprocket carrier itself is aluminum, the studs are steel and are pressed into it I believe, as well as the nuts which are steel.

I could be wrong, but I highly doubt your equipment there is messed up. If it was you'd probably know immediately upon disassembly. I mean how many times have you removed the rear sprocket and torqued down the nuts to 67.5 lbs over and over?

[CBRBob]

Originally Posted by SPL170db

K7 1000 had this issue

K7, KY whatever you ride

[V2Rider]

I have them at 50, seem to be doing fine.