But they don't list belt kits for any Yamaha double decks.
There is a "belts by size" section. If there are old belts to measure (deducting 10% - 15% for being old and slack) and determine what their cross section profile letter prefixes are. Maybe they sell the belts you need individually.
Marrs should be avoided at this time. Krista is in charge and she claims a fire damaged the house and well all sorts of things on the web except people claiming they received their orders or a refund. Find what belts you needs and there are sources but without knowing what to use, the kit suppliers should be adequate.
I did not want to post anything negative as I know we all have troubled times but the last time I did business there I do not feel as if I was treated in a professional manner. In fact I never received all the parts I ordered and and e mailing them did not help. The dealings I had were with a lady that works there. I do not recall her name and when I spoke with her via e mail during the transaction she was rude in my personal opinion. Not only that the deck that I installed the parts in has the same failure again. I will not say it was bad parts that caused it but the faults are the same. When I take it down again I will know more. Was hoping to get this Yamaha running a bit better so I could use it until I pull the Nakamichi back down and fix the problem with it. Thanks for the reassurance and advice.