TRX 400 FW Spark arrestor bolt

Morning all! I bought a 96 TRX400FW about 2 months ago. Noticed it was a bit loud for my liking. I also saw the spark arrestor bolt was missing. Anyone know what size bolt I can use to close that hole up? Honda doesn’t have any in stock and would take a week to get one. I’m sure any metric bolt will fit in there. Looked at the parts fisch and the have all the exhaust bolt sizes except that one of coarse.

Thanks

TRX 400 FW Spark arrestor bolt

Morning all! I bought a 96 TRX400FW about 2 months ago. Noticed it was a bit loud for my liking. I also saw the spark arrestor bolt was missing. Anyone know what size bolt I can use to close that hole up? Honda doesn’t have any in stock and would take a week to get one. I’m sure any metric bolt will fit in there. Looked at the parts fisch and the have all the exhaust bolt sizes except that one of coarse.

Thanks