Sprockets & chain noise help!

[phil x]

The vfr has a clicking noise from the front sprocket, this is most noticeable when pushing the bike or spinning the back wheel by hand rather than when riding.
The chain & sprockets are very good with only marginal wear on the front sprocket (felt with finger).....
The chain rides to the left of the front sprocket (rubbing against the inside of it). If i push the chain centrally as i'm spinning the wheel the noise all but vanishes.
Now,
The rear sprocket is flush on one side & stepped on the other - i have turned this round so the step is inwards (nearest the hub/wheel & sprocket numbers are visible from the left) to try to correct chain alignment.
The noise continues & the chain still rubs against the inside of the front sprocket!
While trying to remove the front sprocket to inspect it, I snapped my 3/8 drive extension (don't have 14mm 1/2" socket). The sprocket bolt is very tight - I feel someone has used high strength stud lock & I really really don't want to shear the head off!
Aggggh
The sprockets are Renthal;
F; 286-525-15t
R; 211-525-40t (3621)
At the moment both sprockets have the numbers visible from the l/h/s and the step on the rear sprocket is to the inside. Is this correct?

Any further ideas or the next step forward.....

I take it the sprocket bolt is std left hand thread?
Any other ideas on the cause of the chain alignment/noise, is there any spacer behind the front sprocket or does it only go on 1 way round?
I have stripped & lubed the swingarm bearings & rear hub but was thorough about rebuilding the same as it came apart.
The noise was there previously but seems a bit worse now?

Cheers, Phil

[Jashdown]

Hmm I've got the same problem, except my chain also randomly gets stuck, locking the rear wheel. It happened after removing my rear sprocket. I believe it's somehow out of alignment,

[phil x]

Are all of your sprocket bolts positioned correctly at the back of the hub - they are round with a small flat to stop them turning.
New chains sometimes do make a bit of noise - particularly if it's a genuine front sprocket with rubber cush.

Phil

[phil x]

No one know which is the right way for the rear sprocket???

Phil

[jetblack]

Are all of your sprocket bolts positioned correctly at the back of the hub - they are round with a small flat to stop them turning.
New chains sometimes do make a bit of noise - particularly if it's a genuine front sprocket with rubber cush.

Phil

Doesn't the rubber cush take some of the noise out?I thought it would cushion the 'shunt' and dampen it..?

[porndoguk]

No cush drive on the nc30 fella

[jetblack]

Nah, i mean the rubber damper thingy ma bob on the OEM front sprocket..not a proppa cush drive set up.

[phil x]

They are Renthal sprockets with no rubber cush, the noise is more of a click as the chain goes round the sprocket slowly so nothing to do with whether the sprocket has the rubber.

Does anyone know the correct orientation of the rear sprocket - the stepped lip to the inside (wheel) or outside?

What's the likelihood of the front sprocket bolt snapping?

Cheers, Phil

[arsey30]

Rear sprocket goes on with stepped shoulder to the inside.
Very little chance of a g/b sprocket bolt shearing in use, as the sprocket is splined on to to the shaft

[phil x]

Rear sprocket goes on with stepped shoulder to the inside.
Very little chance of a g/b sprocket bolt shearing in use, as the sprocket is splined on to to the shaft

Ahaa, thank you - so my rear sprocket was fitted incorrectly by the previous owner - now corrected.

Ref the front sprocket bolt; I was trying to undo it to inspect & find the source of the noise but it is really tight (my 1st post) & I can't undo it, I have sheared my 3/8 short extension & don't have a good 14mm 1/2 socket with a hex - getting a socket isn't a problem, I don't need to remove it yet as such but one day I will....
If someone has used high strength stud lock & I shear the head off I'm stuffed!

Phil