Common 670 Solutions

[slonomo]

Originally Posted by smackley

This is great info, and great timing for my own 670 project. I was racking my head around the idle issues. Thanks for taking the time to make this.

Also, what the heck is the cranks shaft bolt thread and size? Nothing in my random bolt bucket is threading in. I googled a bunch of verbiage that I thought would turn up results easily but I only saw info for predator 212cc 3/4 shafts.

I can't find any info on the crank bolt either. I do know it's a fine thread. I believe I used the same bolt from my Vanguard engines, I think they were either 3/8-24 or 7/16-20. I'm afraid I don't have the 670 anymore so I can't check it.

[PharmGuy85]

Originally Posted by smackley

This is great info, and great timing for my own 670 project. I was racking my head around the idle issues. Thanks for taking the time to make this.

Also, what the heck is the cranks shaft bolt thread and size? Nothing in my random bolt bucket is threading in. I googled a bunch of verbiage that I thought would turn up results easily but I only saw info for predator 212cc 3/4 shafts.

With Comet 780 clutch use 3⁄8 x 24tpi x 3” Clutch Bolt

With CVTech clutch use 3⁄8 x 24tpi x 4” Clutch Bolt

That's from the Vegas Carts installation manual.