cb450

The bike: Honda CB450 1973 All stock except - Pamco Electric points with an electric advancer Initial symptoms Bike idled properly at 1200rpm and started from kick After riding, the bike would sit at 3K rpm and white smoke would emit from the left exhaust. Left spark plug was black and wet...

I thought I'd make a thread to record some of the resto modding I am doing on "Aseizja" (I call it this as a joke because it seems like the last guy to work on it must have had "a seizure" halfway through building it and given up). My other stock oem build is called "The Magnum Opus" (for it...

Hi all, I am looking for a starter clutch for my 450. I am not totally sure how compatible other years are but mine is a 1973 K5. I only need the actual clutch as the sprockets and chain are fine. I am located in Cincinnati but am happy to pay shipping and all that. The other ones I've found...

I own numerous Motorcycles and recently became enamored with Honda's CB 450 engine design. I purchased these two for 1000 and 900, respectively. The CB was in running condition the CL was not. Both had been sitting for 20 plus years. These are the photos of the bikes the day I bought them. So...

Earlier this summer I finished the rebuild of my 1973 CB450 and can't seem to fix the front brake squeal. It have completely rebuilt the front brake and forks. The caliper has a new seal (old piston) and new brake pads. I had a machine shop turn the original rotor so it should be true. I tried...

I'm looking for a wrap-around grab bar in good condition for my 1973 CB450K6. Hoping someone here has one they would sell me at a reasonable price!

Purchased on 7/13/25 and ridden home that night about an hour away from Farmington CT It has been a busy week since I picked this up, and I've spent most of it documenting and going over what I'd like to have done It seemed to start ok, but the owner I purchased from only had it for a month...

I am restoring/plishing covers and cam towers/bearings and I was stopped by a question I had where selecting clear coat for polished covers is concerned and temperatures reached at full heat soak. It is safe to assume that the exhaust cam towers and exhaust cam covers get the hottest since...

Ran across an estate sale with some parts in it on my search for a barn find! Sorry for the short notice, hope this helps someone! Estate Sale: https://craiglytleauctions.hibid.com/catalog/630192 Honda Parts Listed: Lot # : 7 - Assorted Honda clutch and throttle cables -...

Hey guys, I need to replace my head gasket. It started pouring oil a couple days after I advanced the timing, performed a valve adjustment, and adjusted cam chain tension. I‘ve looked at the service manual and it doesn’t look like it covers much in the way of head gasket replacement. Is there...

Rebuilding a 1968 CB350 K0 and thought I had found the perfect used OEM seat on eBay; it appeared correct and in excellent condition. However upon fitting it to the bike, I realized it does not fit the CB350, it's longer than the stock seat, the rubber cushion spacing is off, the support strut...

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Hi guys, does someone know the spring rate for the OEM 13.5" showa shocks that came with this bike? Thanks ....

Good article with cool pictures. Motorcycle History: 1965 Honda CB450 – The Black Bomber Or The Prophet | Curbside Classic Even the comments from previous readers are interesting. One reader stated "Coils springs and torsion bars work the same way. They derive their spring function from...

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It's butchered up and needs some love but if anyone can restore this bike, it's the people in this forum. So rarely see one for sale...

I bought a new petcock for my 1974 CB450 back in May of 2021. The old one was leaking and was not OEM, so I trashed it when I installed the new one. I didn't have any issues for the first 5 or so months, but it started leaking over the past week, while in the OFF position. The leak is through...

I believe I purchased the last of the four prototype oil pumps that Jays100 produced for the CB450. I finally had time today to carry out the installation, so I'll share some pictures and notes about how the installation went for me. My machine is a 1974 k7 and I found it on Craigslist in...

Need it with no cracks and all the attachment tabs in place, it's ok with minor cosmetics damage. Have a good night and ride safe

Dear Vintage Honda Twins Community, Chris Saxby who many of you may already know from this Forum has been providing valuable guidance over the lockdown period on my restoration of a 1966 Black Bomber. During this time I have also acquired a 1968 'Red' Ken Ives Bomber with its original...

Hi, I want a Service manual for the bike and I just cant seem to find one. Any help?

So from back on Honda Twins forum I was told cool kids moved over here...You guys really help with the rebuilt of my 85 cb450sc. Well I have now bought new coil (GT500) and cdi unit from Rex’s Speed Shop and still no sparks. I was gonna ask if it looks ok but I dont know how to post pictures...

Hello everyone, I thought given the state of the engine right now it might be best to make a log thread, since i always have a few questions and I think it's better than to inundate the other sections. So first of all, a little history and a few pictures! I got this bike in the summer of...