Chain adjustment markers on swinging arm

How accurately do the markers match on both swinging arms on SV650S K1 and Svs generally? Some say they're spot on, including the Haynes manual, whilst other conspiracy theorists claim they can be quite a bit out and the only sure way of aligning the rear wheel is to use an expensive laser tool thingy. So far I've relied on the markers and the bike feels fine to ride. But I've just had the wheel off for a new tyre and I thought the sprocket was slightly (but not massively) worn on one side. Although this may have happened in the first 8k before I got the bike.

most accurate way is to measure from the centre of the swinging arm bolt to the centre of the rear wheel bolt. chain adjusters are made of cheese and I never rely on them

[jambo]

The marks on the swing arm aren't far off, however the plates you use to line up on those markers can move quite a bit leading to the vagueness.

All you need's a bit of string or some straight bits of wood / metal to get it sorted, it's all in the haynes.

Jambo

[Dave20046]

I've always just used them and looked down the chain to make sure it's not moving weirdly and never felt any detrimental affects when riding. Is it worth double checking with the string, even if you can't notice anything wrong?

With the guard remove due a visual check and if you think it slightly out use a straight edge ie builders level will suffice, with the top on tension.
Cheap and cheerful but accurate enough.

Originally Posted by PaulSV

most accurate way is to measure from the centre of the swinging arm bolt to the centre of the rear wheel bolt. chain adjusters are made of cheese and I never rely on them

Thanks, did this with a builder's set-square and it's given me peace of mind and it feels fine to ride.