3-Guyz Belt-to-Chain Conversion

Tech DIY | Chained-Up

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

02. With a refreshed powerplant and new transmission, we didn’t want to put the antiquated OE belt and pulley on it.

03. The 3-Guyz transmission sprocket was placed on the transmission shaft and checked for any tolerance issues.

04. With both components being completely compatible, Kevin carefully spun on the supplied locking transmission nut with an impact gun.

05. The nut was then locked to the transmission with two hex-head bolts treated with threadlocking compound.

06. The inner primary plate was installed and the sprocket was checked for proper clearance.

07. With the sprocket having plenty of space to spin freely, the rest of the Primo primary drive was installed.

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.

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.

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.

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.

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.

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


(503) 645-4898 | 3guyz.com

Harley-Davidson of Anaheim-Fullerton
(714) 871-6563 | harleyfullerton.com