Having problems finding a replacement coil, would any 12volt motorcycle coil do ?

My welder has told me he is not a plonker and removed the exhaust system before welding

I was given a non running '93 3YF which I finally got running recently, although it would only run on full choke ! After welding up a big hole in the exhaust, the bike would not start at all. Checking the plug, I noticed a very week spark so I replaced it with a new one. Now it won't spark at all ...

4 years ago, I rescued a non running '93 3YF with no bodywork from going to bike heaven and am now nearing completion on having a complete running bike. Unfortunately, I cannot find a l/h air scoop anywhere, can anybody help. Also, does the l/h side panel have a lower piece since the one I have ...