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I started on a single shock swingarm several months ago. A customer who is a super machinist made a part for me so that I can take off the final drive unit. I brazed it all up and took it to some friend's shop and sandblasted it so I could see how it was turning out. I misplaced the smaller part that attaches to the final drive unit and it was driving me crazy. I couldn't figure out where I has left it. Finally, yesterday it showed up.

I have primed it as I had the main part and put it together so I could take a picture to send to the man who made the breakaway joint for me. I had incorporated it into the swing arm less than a week after he traded it to me. I had planned to send him a picture but couldn't due to the missing part. I was worried I'd have to ask him if he could make me another.

The swingarm isn't finished. As you may have already guessed, the upper braces are made from a mountain bike fork, mainly. It remains for me to finalize the shock mount configuration and make brackets.

The frame I plan on using has a standard CC prod. type brace. I'll do what I did on my current cafe racer and tie the upper transmission to engine bolts into the braces. That idea was mentioned by vanzen and I really like it. The single shock swingarm is, for me, uncharted territory.





Chuey

Looking good so far. Where will the shock mount on the frame?

That's really cool Chuey that you're out there in unchartered waters.
That looks to be quite a nice little joint.

It was in the fridge, wasn't it.

Basically, the shock will go where the airbox was.

Chuey

Chuey wrote:Basically, the shock will go where the airbox was.

Chuey

Upper (front?) eye on the frame-to-trans bolts bracing?

melville wrote:

Chuey wrote:Basically, the shock will go where the airbox was.

Chuey

Upper (front?) eye on the frame-to-trans bolts bracing?

Don't know yet. Have to figure that out.

Chuey

How will you decide on which shock to use?

What is the advantage of a mono shock over the twin shocks? There must be one since everything has gone that way now. I thought production cost could be part of it, but that would hardly be a motivator for your project, which looks very nice, by the way.

I figure one of the shocks from a Ducati or the one from a Guzzi 1100 Sport should work fine since the layout is similar and so is the weight.

I'm hoping to get a cheap one for set-up and then source a more sophisticated one down the line.

I can't help but think how nice it would be to have an uncluttered corner in which to set this frame up. I think it could legitimately be said that I have too many projects.

Chuey

bbelk wrote:What is the advantage of a mono shock over the twin shocks? There must be one since everything has gone that way now. I thought production cost could be part of it, but that would hardly be a motivator for your project, which looks very nice, by the way.

It cenertalizes some of the stress points on the frame to help reduce flex. The subframe now just holds the seat in place and can be made much lighter. The swingarm will be much stonger as well.


And it looks real cool too