Topic: 1976 Honda cb750K

[BenelliSEI]

looking like she just rolled off the showroom floor !!         on my chain adj. bolt i double nut it . never comes loose   

Funny you mention that. I left them loose as I like to use a nut with a base flange built into it for that spot. Snugs up nicely against the bracket!

[BenelliSEI]

Yesterday I used a very inexpensive chain tool I bought on Amazon (about $25). The one I’ve had for years is tiny and needs to be held in an adjustable wrench when in use. Very awkward. This one was a big improvement and worked really well!

[MauiK3]

Nice tool, I've always just used the master link. Riveting is better, seems difficult.

[BenelliSEI]

Nice tool, I've always just used the master link. Riveting is better, seems difficult.

Steve….. It’s very easy, with a good tool. There are two critical parts. When pressing on the outer cover, measure the width of an adjacent link, so as not to over compress the link. When riveting, I measure the original pin diameter (this one is 5 mm). Then use the tool to flare the end and measure the diameter of the end as it opens up. In this case, the manufacturer suggested +0.50 mm, so I stopped when the pin grew to 5.50 mm. The only risk is overdoing it and splitting the end of the rivit. Measuring as you go prevents that!

[PeWe]

Riveting tool look good.
I found a really strong chain 2013.
I had to invest in a pricy tool to handle solid master link the chain had. It could handle hollow rivets too plus opening the chain after some grinding.
Brand Whale. I have another tool to press on the side link. Plus home made distances for riveting procedure making it impossible to rivet too hard.

It is very easy to make some mistakes when riveting the chain.
Last mistake with hollow rivet when part of the rivet was torn off.
Grease the hole before tighten and rotate the tool.

I learned the hard way to order at least 2 extra master links with a new chain when riveting the hard solid linked DC chain. Their toughest chain for multi hp bikes.

The X-rings need to be lubed to not dry out and wear wich will shorten the chain life.
I killed that strong chain 5000 km too early due to change to crappy Maxima chain wax spray.

My favourite is Motorex chain lube Road strong.

[BenelliSEI]

My chain has hollow rivets. I always lube the contact point and it went smoothly!

[Floshenbarnical]

I have severe project envy

Fantastic work

[BenelliSEI]

I have severe project envy

Fantastic work

Thanks….. My son did a quick tally and figures this is at least the 30th bike I’ve put through the shop. The S/C and the Rickman CR are patiently waiting their turn.

[PeWe]

That's a lot of bikes for own use!
To a very high specification too.

I have mostly rebuilt same bike over and over again   

[BenelliSEI]

It’s about one a year…..

[Floshenbarnical]

Yeah one of my coworkers came and showed me a picture just now which appears to be another 77 750F2 sitting in a field a few miles away with a cardboard sign on it. I told him to keep the devil out of my house and take his temptation away. I'm not starting anything until this one is finished, lol

[newday777]

Yeah one of my coworkers came and showed me a picture just now which appears to be another 77 750F2 sitting in a field a few miles away with a cardboard sign on it. I told him to keep the devil out of my house and take his temptation away. I'm not starting anything until this one is finished, lol

😆😆😆

[BenelliSEI]

Yeah one of my coworkers came and showed me a picture just now which appears to be another 77 750F2 sitting in a field a few miles away with a cardboard sign on it. I told him to keep the devil out of my house and take his temptation away. I'm not starting anything until this one is finished, lol

That’s how this one got here! Ignore that guy…..

[BenelliSEI]

Had a great “ski break”, back on it today. Dismantled the carb rack I plan on using (086A). I have #105 mains and #40 idle jets in these carbs that are apparently what I need. The needle is marked “271301”.

Anyone know if that is stock brass or an aftermarket part?

It has 5 clip positions and is clipped in #3 middle. The attached chart suggests they should be in the 4th slot from the top (Mark P. calls it the “blunt end”). I’ll start with it there.

Any other suggestions?

[newday777]

I have 2 or 3 sets of 086A but haven't opened them up yet.

[BenelliSEI]

“Cycle Ranger” provided this excellent link to a really detailed and useful discussion, directly related to my question. Looks like I have what I need to get these carbs built. Thanks!!


I believe that "271301" is original Keihin.

Here's some comments about about 086A carbs.

http://forums.sohc4.net/index.php?topic=175304.0

[HondaMan]

Had a great “ski break”, back on it today. Dismantled the carb rack I plan on using (086A). I have #105 mains and #40 idle jets in these carbs that are apparently what I need. The needle is marked “271301”.

Anyone know if that is stock brass or an aftermarket part?

It has 5 clip positions and is clipped in #3 middle. The attached chart suggests they should be in the 4th slot from the top (Mark P. calls it the “blunt end”). I’ll start with it there.

Any other suggestions?

The #271301 was the stock needle in the 086a carbs on the bikes with the "F" cams. I showed up in some of the K6 bikes if they also had that cam, which opens intakes at 0 degrees TDC. (There's also a #271302 out there...).
Otherwise (in the roundtops) it was #27101, #27102 (California) or #27103 with the intake valves opening at 2-5 degrees BTDC..

[Galactica]

Had a great “ski break”, back on it today. Dismantled the carb rack I plan on using (086A). I have #105 mains and #40 idle jets in these carbs that are apparently what I need. The needle is marked “271301”.

Anyone know if that is stock brass or an aftermarket part?

It has 5 clip positions and is clipped in #3 middle. The attached chart suggests they should be in the 4th slot from the top (Mark P. calls it the “blunt end”). I’ll start with it there.

Any other suggestions?

Where were you skiing?  The local mountains here haven’t any snow.  Conditions in the interior BC are pretty good though.  I ski telemark on G3 Rapid Transit skis. 🎿

[BenelliSEI]

Had a great “ski break”, back on it today. Dismantled the carb rack I plan on using (086A). I have #105 mains and #40 idle jets in these carbs that are apparently what I need. The needle is marked “271301”.

Anyone know if that is stock brass or an aftermarket part?

It has 5 clip positions and is clipped in #3 middle. The attached chart suggests they should be in the 4th slot from the top (Mark P. calls it the “blunt end”). I’ll start with it there.

Any other suggestions?

Where were you skiing?  The local mountains here haven’t any snow.  Conditions in the interior BC are pretty good though.  I ski telemark on G3 Rapid Transit skis. 🎿

We spent 5 days (Family Day Long Weekend) at Sir Sam’s. Rent a large cottage for the entire family (eleven of us) on Eagle Lake, near Haliburton, Ontario. Got about 10” of fresh snow Thursday night, on top of an excellent base. Great conditions, the whole time!

[BenelliSEI]

Cleaned out the small ultrasonic tank and brewed up a fresh batch of 20:1 water and Simple Green. Started with #4 carb. All the brass went into carb cleaner for a soak. Blew out nice and clean so ran them and the carb bodies through the tank. Light polish on the float bowl and the top, and one is done. Air screw out one turn.The clip on the main needle got moved down to #4 slot. One done, three next time. Eat, sleep and repeat!

[BenelliSEI]

Handy “tea caddy”. About 3” long, it holds all the small parts. Latches closed and I suspend it in the tank. Saves digging around for the tiny bits afterwards.

[newday777]

Nice.
I use a tea caddy also.

[willbird]

The carbs cleaned up nice :-). I'm still rooting around in the ultrasonic for small parts like a savage LOL.

[lash]

Where do you buy a tea caddy?

[BenelliSEI]

Where do you buy a tea caddy?

Dollarama!