Help adjusting gears. Could it be new chain length?

[RhythMick]

About 50g. Nothing to worry about!

Right. 5 Jelly Babies I'm guessing.

 

[RhythMick]

Ok thanks all. Ordered ...

Shimano Deore M590 Triple chainset 22.32.44 Black
Shimano Deore 9 speed 11/32 cassette, CSHG50 (£19 inc p&p bargain)
LockRing tool & chain whip
Guessing I'm also going to need a Bottom Bracket tool so I ordered the Park Tools one.

All has arrived except the lockring tool, bottom bracket tool and crank puller. Dammit.

 

[mickle]

You dont need a bb tool for this job...

 

[RhythMick]

You dont need a bb tool for this job...

I'm replacing the whole crankset including the bottom bracket.