Thunderbird Trike Clutch

I'm no expert but I'd certainly not recommend using an impact driver ... unless

• the resevoir is off the bike; is supported at the sides and underneath, and is held firmly somehow with soft material. I,m fairly sure the resevoir will be cast alloy and, therefore quite brittle - be patient and be gentle or be prepared to buy another resevoir!
• you're using a proper JIS bit or driver (I think the cap screws are JIS type not Phillips or Pozidrive). If you don't have JIS drivers get a set, you'll save a lot of aggro in time https://www.amazon.co.uk/Yrsssa-T-H...eywords=jis+screwdriver&qid=1767999816&sr=8-9

• you've soaked the screws for some time in a proper easing oil - WD40 isn't really a penetrating oil, though it might work in some circumstances. Try RP90 from toolstation https://www.toolstation.com/action-can-rp-90-penetrating-oil/p36877 or PlusGas from Screwfix https://www.screwfix.com/p/plusgas-formula-a-dismantling-lubricant-400ml/485ht Leave them soaking overnight.

Good luck. Hope you get it sorted.

 

@philho Welcome to the family. Your question can't get a better answer than that by @Adie P. Right tools and patience is the key.