Join Date: Nov 2009
Location: Hemet, California, 75 miles SE of LA
16/43 and alternatives
Search for 16/43 or 16f/43r on this and other Strom forums. This is an extremely popular change because it matches the engine better, gives you more grunt at lower RPMS, and makes 6th gear practical at higher (interstate highway) speeds. Another benefit is that this ratio lets you can keep the OEM chain if you're making the switch early in the life of the bike, but that may not be a consideration in your case. I have 16/43, love it since I go on fire roads and dirt roads a lot. Works perfectly with 5th and sixth in the 60 to 80 mph range, too.
When the current sprockets and chains are toast, I'm thinking of going to 17/46 with a 530 size chain vs. the OEM 525 if it can be done. This would almost perfectly match the gearing of 16/43 but avoids any possibility of wearing down the swingarm protector prematurely. Plus I like the theoretically slightly increased lifespan of larger-radius sprockets. My first move would be to call Blair at SV.