Hello,
My father has recently started a business machining swing arms for the ds90x. My cousin races one here in Pennslyvania....where it seems that aftermarket racing parts for this machine are not too available, and what is is rather expensive. He has his website up and running, though the full product list is still a work in progress. I would like to add that my father Dave (Hap) machined the swingarm after the stock part was not up to our teams racing standard. He attempts all of the prototype work on my cousins machine.

I will now share with you the site Old Skool Racing Parts and Performance

Please feel free to ask him questions and give your support.

Thank you.