I donpt have the part number handy but the last batery I bought for my 907 was a sealed unit from a Harley Davidson. It's about three years old now and even with less than stellar maintanence, it's still working great. Plus it will never spill acid on anything.

Cost around $70 if I remember right. Bring your old one to the shop with you, they can match it up. Be careful - if you get the traditional style battery, they may try to sell you one with a black case that is a PAIN to see through to check fluid levels. Ask - they may have a more transparent white one instead.

Just bought a EXT16 Deka off ebay, it was around $51.00 with delivery, a factory 2nd. Wish I had it before I trashed my clean swing arm ten years ago!