Recently bought a 1980 Cota 248 and v pleased with it. Just doing a bit of fettling tho and I noticed the steering head bearings are a bit loose, ie there's a little bit of play when I rock the bars. I presume they're new but want to tighten them up. Any advice? Is it just a case of loosen the top clamp (or take it off?) then tighten the head fastener? 

I thought the steering a bit too lively so this might help.

You may need these!   https://www.inmotiontrials.com/product/cota-tapered-steering-bearings-pair/

 

Done. I needed a 32mm spanner. No other dismantling needed to get to it. Saying that I had a slim 32mm spanner that I bought to undo a cooling fan on a BMW I once had.