Author Topic: Got rid of my 550K... and replaced it with a 550F and a 350F  (Read 27232 times)

0 Members and 2 Guests are viewing this topic.

Offline BenelliSEI

  • Really Old Timer ...
  • *******
  • Posts: 11,556
  • 1969 cb750
Re: Got rid of my 550K... and replaced it with a 550F and a 350F
« Reply #175 on: September 01, 2025, 12:06:58 PM »
It looks really great. Nice job!

Offline UFOwasaband

  • Full Member
  • *
  • Posts: 18
Re: Got rid of my 550K... and replaced it with a 550F and a 350F
« Reply #176 on: September 02, 2025, 04:27:00 PM »
Great thread !

Offline carnivorous chicken

  • Master
  • *****
  • Posts: 2,130
Re: Got rid of my 550K... and replaced it with a 550F and a 350F
« Reply #177 on: September 03, 2025, 07:58:42 AM »
Thanks guys!

Offline carnivorous chicken

  • Master
  • *****
  • Posts: 2,130
Re: Got rid of my 550K... and replaced it with a 550F and a 350F
« Reply #178 on: November 20, 2025, 07:39:38 AM »
Figured I'd do a quick update since I went back to Phoenix, brought some parts for the 350F and picked some stuff up to bring back for the 550F here in CDMX...

I found 350F front and rear turn signals -- had them in box here in CDMX, and they were clean. One had a clipped wire, so I had to switch out the internals for another, then go to town with a brush and some polish. They came out great. Fitted them to the 350F when I got to Phoenix, and brought back to CDMX the stock 350F1 stalks -- the chrome is bad, and I am going to rechrome a few pieces here so I figured I'd do those. I also fitted the original tank -- in faded Glory Blue Black Metallic, to match the side covers. And I had removed the rear foot pegs when I took off the corroded original exhaust, so I put those back on. Zipped around Phoenix and Tempe, took it on the freeway a few times, cruising pretty easy at 65, but damn -- that Kerker is loud. Took a photo of the other side cover -- hence the name "Spotted Dick":



Was going to take a photo of the whole bike on Sunday, my last day but... the bike left me stranded by the side of the road (for a little while, at least). I was on the freeway and heading to Tempe from Phoenix when the engine started to slow down. I pulled off (and luckily it was about a mile from where I was staying) and coasted it around the corner to a side street. I let it cool off for a little while, had a look at the plugs -- they were all fine. Then I pulled off the points cover and the 1-4 points were dirty and oily. There isn't oil coming out from that seal, but there was a little drip on that side and the points cover seal is broken in a few places and doesn't really seal -- so I figure a drip must've gotten on the points. I cleaned them up and the bike fired back up  and got me back to my friends' house, but wasn't running well. I'll probably get a spare set of points but try to clean these up first and get a proper seal for the cover (and clean up those drips).

But the whole charade made me late for what I had to do (lunch then skating a pool) so I didn't take any more photos. I also considered another name for the bike -- lipsticked pig -- because I'm putting on these nice and shiny bits like the signals but the tank and sidecovers have... patina? As does the engine. One thing I did was buy a cheap tail light mount on Ebay to bring back and thrown in with the stuff getting rechromed, so one more shiny piece. I'll clean up the engine at some point better than I did. When I got it from Sean, the whole front was covered in oil but it wound up being from loose tappet covers and much of that oil I just washed off with engine cleaner, but it could use a little more. I think the drip is coming from the valve cover, but with limited time every time I go to Phx dunno when I will get to that.


Offline seanbarney41

  • not really that much younger than an
  • Really Old Timer ...
  • *******
  • Posts: 11,158
Re: Got rid of my 550K... and replaced it with a 550F and a 350F
« Reply #179 on: November 20, 2025, 09:00:36 PM »
That thing has to sound amazing with a Kerker,  I have one on my 750F but that does not generally rev to 10,500?
If it works good, it looks good...

Offline carnivorous chicken

  • Master
  • *****
  • Posts: 2,130
Re: Got rid of my 550K... and replaced it with a 550F and a 350F
« Reply #180 on: November 21, 2025, 06:43:41 AM »
That thing has to sound amazing with a Kerker,  I have one on my 750F but that does not generally rev to 10,500?

It does, and I wind that thing up to 7500-8000 rpm and it screams. When I'm there I'm on Mexico City time so up around 6 or earlier and out the door at 7 to grab coffee -- try to keep the revs down so I don't annoy the neighbors. Doesn't seem like there is much baffling at all.


Offline carnivorous chicken

  • Master
  • *****
  • Posts: 2,130
Re: Got rid of my 550K... and replaced it with a 550F and a 350F
« Reply #181 on: November 21, 2025, 06:56:28 AM »
One of the things I brought back for the 550F here in CDMX are seals for the cylinder head side cover. I was seeping a little oil from those, and the old o-rings were brittle and sat completely flat. maybe the easiest seal to replace, or one of them -- but raises the question: why do these things exist? They're not on any of the other SOHC4s. They must be there for a reason... Polished them up while they were off, and back to the races.

I also bought the reflectors for the headlight, used from Ebay. Aside from a braided brake line, I think that brings it back to nearly 100% stock.

That being said, I also brought back some lower rise bars. I bought a set of stock 550F handlebars with the switches, but only the LHS one looks like it will function. The RHS one was crap and fell apart. So I may switch out the bars to make going through traffic a little easier, but it won't happen now since I want to keep the switches on the stock bars in place so I can just throw them back on. Still need a functioning RHS switch.

Since I've had the carbs dialed in, one of the things I appreciate is that I've been able to get on that bike and just go, with occasionally putting the battery charger on (I'm going to check the charging system at some point...). No need to check (and clean) plugs or do much fiddling, which is nice. I guess it's mostly routine maintenance, which will include the occasional replacing of seals.