water pump impeller tightening?

[breakdirt916]

is there a trick to tightening it?

I put the impeller back into the bike, put it into gear, squeezed the rear brake the best I could while trying to tighten it...but it kept moving...not sure if it's tight enough

how do you keep the shaft still while tightening the impeller?

'97 CR80R - just installed new water pump seal

[Kurlon]

Alternator side cove off, breaker bar on flywheel retaining nut?

[b0xmonkey]

Or use something to jam the gear coming of the crank. They sell a special tool for this, I have a piece of brass that works percect.