Chain slack

[Gazfirestormowner]

How much slack do u guys leave on your chain and how do u measure it

[Virt]

I think you're supposed to have about 25mm of slack, while you are sat on the bike upright (no sidestand) ?

[Redthunder]

I use a metal rule

[8541Hawk]

And always remember it is better to run the chain a bit too loose than it is a bit too tight.....

With that, I never measure, I sit on the bike and then reach down and push on the lower run of the chain to take the slack out.

Does it hit the mid-pipe?
If so, it needs to be tightened a bit.

If it doesn't hit the pipe, you are good to go. (though it should be close to the pipe)

A chain that is run too tight not only wears your sprockets at a higher rate, it also puts extra load on the counter-shaft bearing and does not allow the rear suspension to function correctly.

Though as always YMMV

[darkember]

I set mine on the side stand & take about 10 different measurements to find any tight spots. I then set the tension taking my lightweight frame into consideration.

[Saintsman27]

Well I'm a fat boy and really too big... but if this is any use
if I am sat on the bike play is about half inch up and down . not too tight
I keep the chain well spray waxed .. never a problem bikes done 20K
Alb