So after reassembly/mild rebuild, my '72 CB500 was making an awful noise from the primary chain area. I was seriously considering building another motor or installing primary chain tensioner. After spending countless hours on this forum, I have found some posts that recommended syncing your carbs before declaring a national disaster. Syncing tools are not cheap, and the cheaper versions are frequently criticized, so I decided to build my own. The design was readily available on YouTube; and after a visit to Lowes, I had all of the necessary parts for the project.
I wanted to share the parts list with those of you who are also thinking of syncing. So here it is:
Four bottle stoppers (freeze them before drilling for a clean holes)
20 feet of tubing (I bought 3/8)
Four plastic Ts (Lowes only had 3/8 hence the tubing size)
Four 8 inch stake extensions (sold in a pack of three so you'll have to buy six, but great news if you have a CBX)
Four rubber washers
Because the tubing had a large diameter, I kinked it to slow down the air flow (gives you more time to tinker with the adjustments).
But the best part was that the extensions would screw right into the 5mm holes without ANY (!!) modifications. And despite the high temperature, they did not melt. Just make sure to put the rubber washers on them to seal the hole.
I can now attest that synchronization does wonders; I have a new bike--quiet and responsive!
Feel free to ask questions if I was unclear in my wright up.
