chain tension

I’ve got an old Baja Beetle retro fitted with a fully built predator ghost 212. It’s a 35 chain, 3/4 bore and I tried using a master of motion 12 tooth clutch. It exploded 5min in, the sprigs between the clutch pads are bent and over extended. I can find a clutch that’s over 7hp rating. Any...

Newbie here. I got a great deal on a non-running Manco Thunderbird. Cleaned the carb and the motor runs perfectly. The clutch was shot, so I replaced it with what looks like a cheapie from the local lawn mower shop. It is working OK, except the chain seems to bounce a lot when under power. I...

I installed a 6.5hp Honda clone in my Doodlebug today and everything appeared to be working great until the chain came off the sprockets...twice. Two quick questions; 1. how much slack should there be in the chain? right now I can pick the chain up about two inches which is about what it...