I think if you send in a Kirby for Factory Rebuilding WITHOUT original Kirby parts,or with bojack non Kirby parts, no matter what they are,,,they will charge you extra. As long as the parts or components are Original Kirby,,,they will be replaced without additional cost. Any missing or damaged parts damaged beyond repair(due to misuse) will of course be extra charges.
I do know that in order to get the rebuilding done for the price stated in the owners manual, you HAVE TO HAVE in your possesion the original manual, with the exact date of purchase,serial number that matches your machine, and name of the distributor filled out. They WILL except a copy,,so you can keep the original. DONT send in the original owners manual itself,,ive heard of people NOT getting it back again.
I dont think Kirby keeps records of owners or distributors from anything back behind the Heritage Model.
So, if your machine is older than a Heritage 1, and you have possession of the owners manual, and it shows the matching serial number, date and signature of the distributor to your machine,,you can get the rebuilding done for the price stated in the Owners manual,(plus shipping to and from the factory) even if you are not the original owner. (of course, DONT TELL them this, they will assume you are the original owner.,,,yes, its kinda sneaky)
If you dont have the original owners manual and want a Factory Rebuild, call or E-mail Kirby Rebuild Dept. thru the Kirby website for a price quote. Ask for Kathleen LaBant, she is THE Kirby Rebuild Specialist.
Also,if the name plate on the bottom of the Kirby motor has been removed,stripped off, or defaced in any way,,they will deny the rebuilding for the stated price in the owners manual, as there would be no way of cross checking.
This may not apply to any model later than a Classic 3, as all Kirby's manufactured after that have the serial number permanently etched in the metal near the exhaust port.
If you should happen to get ahold of the page of an owners manual that has NOT ever been filled out,(earlier than a Heritage only tho),,you could be sneaky and fill in all the info yourself, if you know what year your machine would have been sold.
The Rebuild Dept probablly wouldnt even care,,,BUT,,,you HAVE TO HAVE that page of the Owners manual in your possession,,,HAVE TO!