3-Guyz Belt-to-Chain Conversion

When we built up the motor on our ’89 FLHS, we also added a six-speed tranny from Rivera Primo. As we were getting ready to bolt the 21-year-old belt and drive pulley back on the bike, it dawned on us that doing so probably wasn’t a good idea. Instead of getting a replacement belt, we decided to give 3-Guyz a call. We ordered up one of its 630 chaindrive kits ($435) that comes with a machined steel transmission sprocket, a locking transmission nut, a billet aluminum rear sprocket, a rear sprocket spacer, an O-ring chain, and all necessary hardware.

3 Guyz Belt To Chain Conversion Chain Drive Kit

01. The kit came delivered to us with everything needed to outfit our old bagger with a chain final drive.

01. The kit came delivered to us with everything needed to outfit our old bagger with a c

Using a chain over a belt for a final drive has its pros and cons, but being able to fix a snapped chain while stuck on the side of the road instead of being stranded by a belt was the topper for us. And let’s face it, chains just look cooler.

The off-the-shelf kit comes complete with everything needed to convert just about any belt-driven Harley-Davidson. If different offsets are needed for custom applications such as funky frames or a large rear tire, 3-Guyz will custom-make it for you.

While our bike was at Harley-Davidson of Anaheim-Fullerton getting the engine and trans installed, our dedicated technician, Kevin, also did the honors of installing this belt-to-chain kit for us. Here’s how it went. HB

02. With a refreshed powerplant and new transmission, we didn’t want to put the antiquated OE belt and pulley on it.
02. With a refreshed powerplant and new transmission, we didn’t want to put the antiquate
03. The 3-Guyz transmission sprocket was placed on the transmission shaft and checked for any tolerance issues.
03. The 3-Guyz transmission sprocket was placed on the transmission shaft and checked for
04. With both components being completely compatible, Kevin carefully spun on the supplied locking transmission nut with an impact gun.
04. With both components being completely compatible, Kevin carefully spun on the supplie

05. The nut was then locked to the transmission with two hex-head bolts treated with threadlocking compound.
05. The nut was then locked to the transmission with two hex-head bolts treated with thre
06. The inner primary plate was installed and the sprocket was checked for proper clearance.
06. The inner primary plate was installed and the sprocket was checked for proper clearan
07. With the sprocket having plenty of space to spin freely, the rest of the Primo primary drive was installed.
07. With the sprocket having plenty of space to spin freely, the rest of the Primo primar

08. The billet aluminum rear sprocket offset spacer was placed on the rear wheel.
08. The billet aluminum rear sprocket offset spacer was placed on the rear wheel.
09. The 3-Guyz sprocket was bolted to the rear wheel with plenty of threadlocker being used.
09. The 3-Guyz sprocket was bolted to the rear wheel with plenty of threadlocker being us
10. Here’s how the sprocket and spacer looked when attached to the rear wheel. Very clean!
10. Here’s how the sprocket and spacer looked when attached to the rear wheel. Very clean

11. Kevin hoisted up the rear wheel and slid it into the swingarm.
12. The chain was put around the transmission sprocket and rear sprocket so the proper length of the chain could be determined.
12. The chain was put around the transmission sprocket and rear sprocket so the proper le
13. The chain only needed to be shortened by a few links from its stock size.
13. The chain only needed to be shortened by a few links from its stock size.

14. As can be seen, an O-ring chain uses small rubber rings on the inside of each plate to improve lubrication therefore extending the working life of the chain.
14. As can be seen, an O-ring chain uses small rubber rings on the inside of each plate t
15. The outer plate of the master link was installed and crimped into place with a specialty 630 chain tool, and the job was done. Now we possess some heavy metal to get the rubber on the road.
15. The outer plate of the master link was installed and crimped into place with a specia