repair

So I posted about my ct70 yesterday after I picked it up. I knew it was having spark issues so I went ahead and picked up a new spark plug, but it turns out that must have not been it. The bike currently has no battery and I'm wondering if that would be the cause? Ive read around and ive heard...

Hi, new member here. I'm mostly a collector of Arctic Cat minibikes but I'm looking forward to digging into my 1974 K3 Trail 70 which I've had since a young teenager in the early 80's. It's 98% complete. It's been sitting idle in my dad's garage for 35 years so I've got more than a few questions...