Please don't try & ride the bike in that condition.
Your nether regions will get caught between the tank and the seat which is quite painful
And I would suggest you fix the bike as well.
Remember these bikes were ridden under fire & can tollerate a lot of bodged parts.
Get it to a rideable condition then get out on it as much as possible.
You will be amazed just how many well wishers will suddenly pop up with offers for all sorts of bits you thought you would never find
Thanks trevor for your words of caution...fork spring and handlebars ate now replaced ,brakes checked and work correctly etc..all cables replaced and correct carb now on..pukka lever set fitted and I've gone over the bike and replaced or sorted anything that may look suspect...which was a lot!(🤞)...electrics gone through!battery replaced,new regulator and a "Ron spec" exhaust and silencer fitted!,.now to start using the blighter!!.....and thanks Ron for the comment you made..its always nice to get a compliment from your Piers 😑!! Pip pip