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New member here, I recently acquired a 76' RD400 and the stock pipes are in pretty poor shape so I am needing some form of replacement.  The bike will hopefully be restored as a very very mild restomod so I was thinking chambers. Based on what I have read here Spec II's are pretty well thought of. Are SPEC II chambers still available? if so where?  Thanks to everyone here who takes time to post on the site I really appreciate the wealth of knowledge shared here.

Thanks

Jeff in Texas