Pivot Joints

[Stratus]

Hello again, straight to the point, I need to know the name of the part that pivots the rear so the shocks can work. Also, if the engine is mounted on the back wont it bounce enough so that the fuel wont be a steady feed? I'm starting my build soon (once I get metal for the frame ).

 

[Doc Sprocket]

I think the term you're after is "swingarm". This refers to the entire assembly. Or, perhaps you are looking for "suspension pivots".

It is better to have the engine mounted independently of the swingarm, but is also more complex, heavy, and costly. This method makes the engine "sprung", as in suspended. Having the engine riding directly on the swingarm is less desirable, but cost effective and simple to set up. In this case, the engine is "unsprung". Under very rough conditions, yes- it can cause fuelling issues.

 

[qtband]

I made my pivot points from pieces of black pipe and some large grade 8 bolts. I also put in a grease fitting.

 

[Stratus]

Thanks for the replies, is there other parts that can be used like a bearing instead of just welding a pipe and pivot around a bolt?

 

[Doc Sprocket]

You certainly can use bearings- that would be even better than just a pipe and bolt. There are a lot of options. Heavy duty rod ends could work, too. For my front suspension, I used 3500lb trailer axle leaf spring hangars and bolts, and tubing drilled to 9/16" to match the bolts. Use your imagination.