Whats this all about????

[custard749]

I have a tight spot on my chain, tight 15mm play, the slack part I can almost push 2 inches of link onto the under side of the swing arm (794s Black swing arm), I have a gold X ring renthal chain which is new (only about 500 miles)
I have put a mark on the chain at the tight point, I then do one rotation and the same mark is now the slack part. I then do another rotation and it becomes the tight point again. The wheel is in straight, the sprockets are also brand new. what is wrong here?
help please:confused: :confused: :confused: :confused: :confused:

[dunlop0_1]

Is it the right chain for those sprockets? eg 520 chain on 525 sprockets.

[Chaz]

Are you checking the chain with the bike on a paddock stand or just moving the bike which will put chain under tension, also is the wheel spinning free?

[PDL]

Sounds like the spockets aren't matched centrally possibly the front

[Chaz]

Could be the front sprocket on the wrong way round.

[custard749]

Thanks for your coments, the chain and sprockets were fitted by Ducati only 2 months ago, done on a paddock stand, wheel turns freely.
But just found the problem, the brand new Renthal rear sprocket was elliptical my 1mm, how this happened I dont know:confused: :confused: :confused: