If you've spent any time scouring the internet for cb350 parts, you already know how deep that rabbit hole goes. Whether you're trying to restore a dusty barn find to its former 1970s glory or you're hacking one up to build a sleek cafe racer, the hunt for the right components is half the battle. The Honda CB350 Twin is arguably one of the most popular vintage motorcycles ever made, and luckily, that means there's a massive ecosystem of spares out there if you know where to look.
The beauty of these bikes is their simplicity. They were designed to be "the people's motorcycle"—approachable, reliable, and relatively easy to wrench on in a home garage. But even the most reliable Honda engine eventually needs some love after fifty years on the road. Finding high-quality cb350 parts isn't just about keeping the bike running; it's about making sure it's safe enough to actually enjoy on a winding backroad without worrying if a decades-old cable is about to snap.
Starting with the Essentials
Before you get carried away looking at shiny chrome fenders or custom seats, you have to tackle the "must-haves." I'm talking about the stuff that actually makes the bike go, stop, and turn. Most vintage bikes that have been sitting for a while will need a standard list of replacements right out of the gate.
Usually, the first things to go are the rubber components. Rubber doesn't age well, especially when it's been exposed to heat and oil for half a century. You'll likely be hunting for intake manifolds, fuel lines, and those tiny O-rings inside the carburetors. When searching for these cb350 parts, I'd always suggest going for modern Viton rubber if you can find it. It handles modern ethanol-blended fuels much better than the original materials did back in 1972.
The Heart of the Machine: Engine and Carbs
The CB350 engine is a workhorse, but it has its quirks. If you're opening up the top end, you're going to need a solid gasket set. Don't cheap out here. A bad head gasket will have you tearing the whole thing apart again in a month. While you're in there, check the cam chain tensioner. This is a known weak point on these twins, and finding upgraded cb350 parts for the tensioner system can save your engine from a catastrophic failure down the line.
Then there are the carburetors. The Keihin CV carbs that came stock on these bikes are actually great when they're clean, but they're often gunked up with prehistoric gasoline. You'll want to find a comprehensive carb rebuild kit. Look for kits that include the diaphragms—those are the rubber bits at the top that often develop pinhole leaks. If your bike is stumbling at high RPMs, that's usually the culprit.
Where to Source Your Parts
There are basically three ways to go about finding cb350 parts: New Old Stock (NOS), reproduction, and used/salvage. Each has its pros and cons, and most builders end up using a mix of all three.
New Old Stock (NOS) is the holy grail. These are original Honda parts that have been sitting in a box on a shelf for decades. They fit perfectly and look authentic because they are authentic. The downside? They're getting harder to find and can be incredibly expensive. If you're doing a museum-quality restoration, NOS is the way to go. But for a daily rider, it might be overkill.
Reproduction parts are where most of us live. There are several great companies nowadays that specialize in vintage Japanese motorcycle spares. These parts are often made to modern standards and are much more affordable than NOS. Things like throttle cables, brake shoes, and electronic ignition kits fall into this category. Just be careful with "no-name" parts from random marketplaces; sometimes the fitment can be a bit wonky.
Used parts from eBay or local swap meets are great for things that don't wear out, like side covers, fuel tanks, or headlight buckets. Just be prepared to do some cleaning, sanding, and painting. There's a certain satisfaction in rescuing a part from a rusty donor bike and giving it a second life.
Making It Your Own: Custom Touches
Once the bike is mechanically sound, that's when the real fun begins. Since there were hundreds of thousands of these bikes produced, you don't have to feel too guilty about customizing one. The aftermarket for custom cb350 parts is huge.
If you're going for that cafe racer look, you're probably looking for "clubman" bars or clip-ons. Keep in mind that when you change the handlebars, you often have to swap out your cables too. A stock throttle cable will be way too long if you drop the bars down low, leading to awkward routing and potentially dangerous binding.
Rear-sets are another popular upgrade. Moving the footpegs back gives you a more aggressive riding position, but it requires some clever mounting. Luckily, several manufacturers make bolt-on kits specifically for the CB350 frame, so you don't necessarily need to be a master welder to get it done.
Upgrading the Electrical System
Let's be honest: 1970s motorcycle electronics were "fine" for their time, but they aren't great by today's standards. One of the best investments you can make in cb350 parts is a modern regulator/rectifier unit. The original units often overcharge the battery or fail entirely, leaving you stranded. A modern solid-state unit is a plug-and-play upgrade that makes the bike way more reliable.
While you're at it, consider an electronic ignition. Setting the points and timing on a CB350 is a rite of passage, but it can be a headache to keep it dialed in. Swapping the points for an electronic pickup means you set it once and never have to touch it again. It makes the bike start easier, idle smoother, and pull harder through the rev range.
The Importance of Quality Rubber
I can't stress this enough: don't skimp on the tires and brakes. When you're looking for cb350 parts that involve safety, buy the best you can afford. Modern tire compounds are lightyears ahead of what was available in the 70s. You can get vintage-looking tires that actually have decent grip in the rain, which is a huge win for safety.
The same goes for the brakes. If you have the front disc brake model, get a new braided stainless steel brake line. The original rubber lines expand under pressure, making the brakes feel "mushy." A stainless line will give you a much firmer lever feel and better stopping power. If you have the drum brake version, make sure you get high-quality shoes and take the time to arc them to the drum for maximum surface contact.
Keeping the Dream Alive
Maintaining a vintage bike is a labor of love. There will be days when it refuses to start, or you find a new oil leak right after you thought you fixed the last one. But there's nothing quite like the feeling of kicking over a twin-cylinder Honda and hearing it bark to life. It's a mechanical connection that you just don't get with modern, fuel-injected bikes that are governed by computers.
Building and maintaining a CB350 is a great way to learn the ropes of motorcycle mechanics. Because the community is so large, if you run into a problem, someone else has probably already solved it and posted about it online. Whether you're hunting for obscure internal cb350 parts or just a cool new set of mirrors, the journey of building the bike is just as rewarding as the ride itself.
Take your time, do your research, and don't be afraid to get your hands dirty. These old Hondas were built to last, and with the right parts and a little bit of patience, they'll be on the road for another fifty years. Just remember to check your oil, keep your chain lubed, and enjoy every mile on that classic machine. There's really nothing else like it.