Predator 212 build - sprocket adapter slips and destroys spokes. Help!

[Old Busted Hotness]

I've got that axle kit, and it works well. It comes with a LH threaded freewheel for the sprocket. Turning a regular freewheel axle around won't work; LH threads won't go on a RH threaded stub.

 

[mark20]

i personally haven't tried it, but in theory it should grip better since you can get more torque on the bolt compared to a allen key. ( as well as having less surface area, and creating more pressure)

have you tried sanding the contact area? maybe try a bit of jb weld and see if that improves grip (you probably wont be able to take it off though lol)

 

[RB55_2018]

i personally haven't tried it, but in theory it should grip better since you can get more torque on the bolt compared to a allen key. ( as well as having less surface area, and creating more pressure)

have you tried sanding the contact area? maybe try a bit of jb weld and see if that improves grip (you probably wont be able to take it off though lol)

I did roughen up the contact area before installing the adapter. Unfortunately it just wasn’t enough. I calculated that I have about 60 ft-lbs of torque at the rear wheel with my torque converter and sprocket setup. JB weld has a low tensile strength, that’s why I used retaining compound instead since it’s meant to stop 2 surfaces from slipping.

 

[5-7HEAVEN]

JMO, the strongest sprocket connection would be the 4-bolt left-hand freewheel, sprocket and new hub.

You don't need the band brake in the kit.

You cannot reverse your existing wheel, as the right-hand freewheel would constantly spin.

 

[5-7HEAVEN]

What size is your drive sprocket?

It's hard for me to believe that your HIGH gear ratio works well for you. Even if you have a tiny 9-tooth drive sprocket, your final drive is only 4:1.

Granted, your Torq-Verter gears down to. 10.8:1. However, that's only at low speed. After that, you're dealing with 4:1 final drive.

In comparison, my 212 project will run thru a shift kit. My first gear is 10.5:1, comparable to your Torq-Verter. Final drive in seventh gear is 5.25:1.

How does your bike feel after your bike shifts out of gear?

Does it buck like a bronco?

 

[Chainlube]

Pin the adapter to the hub. Drill a hole in the adapter and thread in a grade 8 bolt and cut off the head, drill a hole in the hub the same size. Repeat for other side.

 

[inspectorcritic]

Here are pics of my build:
View attachment 98116View attachment 98117

Huge monster if that ever falls over it's gonna break both your legs and if your working below at the time your neck and your skull.
A Harley frame might not be as risky.

 

[5-7HEAVEN]

Huge monster if that ever falls over it's gonna break both your legs and if your working below at the time your neck and your skull.
A Harley frame might not be as risky.

Yes, a Harley is a huge monster. If it ever falls over on you, it's gonna break both your legs. If you're working below at the time, your neck and your skull.

A bicycle frame might not be as risky.

 

[Wrench]

I wondered why the hub adapter isn't Knurled? You would think it would come Knurled
Handle Bars are Knurled and they don't slip.

 

[mark20]

I wondered why the hub adapter isn't Knurled? You would think it would come Knurled
Handle Bars are Knurled and they don't slip.

Manufacturing cost is the main one, since it would cost more to make it (plus equipment that would do that etc)