What are the housing bolts size(s)?

Hello,

Unfortunately, the bolt size information is not available.
Typically, 20 years after manufacturing date, many of that information is not typically available.

You could try calling any dealer that sells Suzuki parts, as they could have some helpful information.

Another option would be to measure the length that you will need for the bolts by measuring the alternator bolt hole and the distance from the end.

Typically, a thread checker can be used where the bolt mounts to, to get the thread size.

Please let me know if you have any questions.
Thank you.