Tight and slack chain

[Eric]

Over winter I have fitted a new chain and sprocket set including all bearings.
The chain is a D.I.D 530ZVM 116 with standard renthal front sprocket and a renthal rear sprocket 1 tooth over standard.
The problem I have is there is tight and loose areas on the chain as it spins, I got intouch with the shop I bought it all from and I advised them that the rear sprocket wasn't running true, they told me that they have heard of this before and sent me out a replacement from a different batch number but its still got tight spots, has anybody came across this problem before and is so how did you sort it.
Eric.

[seth]

Hopefully there are others that can offer more than the obvious stuff we have chatted about .
Good luck mate 

[Hooli]

Off the top of my head..

Mating face totally clean where the sprocket sits on the carrier?

Is the bearing definitely square in the carrier? It's easy to not quite seat them properly & leave it at an angle so the sprocket runs at an angle.

I think I'd be setting up a pointer against the sprockets & turning things over slowly to make sure they are running true.

Something trapped between the sprocket carrier & the crush drive so it's out of line, or something behind a crush drive rubber doing the same thing?

It's worth checking the chain, if you've not riveted it right that link could be stiff making things odd.

I'm sure I recall once managing to get the springy flat plates on the inside of the swingarm (that the spacers run against) out of place somehow & that pushed the axle out of line.

Done anything daft like put one of the adjuster plates that line up the axle on backwards? I'm sure the distance from the edge to the axle is different on each side of the plate. That'd push the wheel out of line & could cause issues I guess.

[Globalrider]

Wheel Bearing?

[Horse]

Have had similar but only with a used chain , if the runout on both sprockets is ok has to be the chain for my 10 cents worth , shouldn't be with a new chain but tight links causes exactly what your describing .

[grog]

I once had similar, was new front sprocket. Also had seized link on 14, loose/tight chain and sounded like had a jackhammer inside gearbox, could hear it from 100 metres.I honestly thought i had huge problem not just chain.As said, check sprocket runout, mounting etc. Go thru each chain link one by one. Have you checked carrier bearing?

[Kiwifruit]

Have you over splayed the joiner pin ?

[Eric]

Have you over splayed the joiner pin ?

No mate I measured the thickness of a link and the joiner link is there or there abouts.

[Eric]

I once had similar, was new front sprocket. Also had seized link on 14, loose/tight chain and sounded like had a jackhammer inside gearbox, could hear it from 100 metres.I honestly thought i had huge problem not just chain.As said, check sprocket runout, mounting etc. Go thru each chain link one by one. Have you checked carrier bearing?

I checked the front sprocket mate and it looked to be running true.

[Eric]

Have had similar but only with a used chain , if the runout on both sprockets is ok has to be the chain for my 10 cents worth , shouldn't be with a new chain but tight links causes exactly what your describing .

That's something I haven't checked,so will be on my list of checking things.

[Eric]

Wheel Bearing?

all new bearings in back wheel and carrier.

[Eric]

Off the top of my head..

Mating face totally clean where the sprocket sits on the carrier?

Is the bearing definitely square in the carrier? It's easy to not quite seat them properly & leave it at an angle so the sprocket runs at an angle.

I think I'd be setting up a pointer against the sprockets & turning things over slowly to make sure they are running true.

Something trapped between the sprocket carrier & the crush drive so it's out of line, or something behind a crush drive rubber doing the same thing?

It's worth checking the chain, if you've not riveted it right that link could be stiff making things odd.

I'm sure I recall once managing to get the springy flat plates on the inside of the swingarm (that the spacers run against) out of place somehow & that pushed the axle out of line.

Done anything daft like put one of the adjuster plates that line up the axle on backwards? I'm sure the distance from the edge to the axle is different on each side of the plate. That'd push the wheel out of line & could cause issues I guess.

Thanks hooli that gives me a few avenues to explore.

[Eric]

Hopefully there are others that can offer more than the obvious stuff we have chatted about .
Good luck mate 

[Eric]

OK people thanks for all your input on my little problem, I have looked at all the suggestions that everybody contributed but to no avail so as a last resort I bunged the old rear sprocket back on and guess what the problem went away, who would have thought that two brand new renthal rear sprockets was to blame.It was a last resort putting the old sprocket back on as I was at a loss I would  never have thought that the replacement sprocket would be at fault, I did think that it was possible but highly unlikely, so that's it for me....no more renthal sprockets.
Once again thanks for yer input.

[Eric GSX1400K3]

So you are now running a new chain on an old sprocket  or did you get another new, different branded sprocket?

JT full steel are good quality, id be steering clear of fancy aluminium sprockets myself.