Drive chain help

[hontr35]

I just have a quick question, I just purchased a +1.25 swingarm so I am just wondering how long of a chain do I need? Stock gearing. I just don't want to buy one that is to short, and also maybe thinking one of you guys know the exact size I might need?

Thanks for all your help.

[underpowered]

i believe my chain is 2 links longer than stock. stock is 96, mine is 98 with my +1.25