Topic: 1977 Cb550k - tappet hits cover

[DaveBarbier]

Hondaman sells a blade style fuse holder that fits in the stock location. Just giving you another option.

http://sohc4shop.com/catalog/product_info.php?manufacturers_id=12&products_id=48&osCsid=354eb29cd0be62681d5716763d832495


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[Can550]

Thanks Dave
I am considering that route however shipping to Canada is 25$


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[Can550]

So I took my fuse box apart yet again, remove poor soldering and cleans wires tin them (as fuse was getting warmer). Bought brass screws and nuts with brass lock washers. Crimped ring connectors on wires and bolted them on to fuse holder as they come out. While out, sanded/ polished them to clean shiny smooth look. Put them back, connected fuse, started bike went for a little ride, stopped checked, reached back and checked, it was warmish but not hot.
Used the spare fuse holder spot as original spot wash touched with hot soldering iron.
Is it acceptable, low resistance solution ?




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[TwoTired]

Using the spare position is fine. Never solder the clips while still in the holder.

Using too short fuses is not ok.

The clips have to self align to accommodate the fuse ends.  This allows maximum contact area between fuse end and clip.  Too short a fuse reduces contact area.  This is like using a wire size that is too small.  You can expect heating when higher currents occur.

Cheers,

[halllzy]

Nice restore job!  I'd love to see heat shrink on the wires in image 1; not sure if it's the angle but the terminals look close enough for a drop of water or bit of jiggling to get them touching.  Definitely important to get the right length fuses.  The home hardware stuff works in a pinch but if you're putting a few items together for an order throw proper fuses in for back up.
Side note vintagecb750.com is cheaper on some items over 4into1 and ships from Stratford ON (nice and quick); crappy note, they only charge in USD and shipping is charged in USD.  If you manage to convince them to let you pick things up rather than ship let me know!!

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[Can550]

Thanks halllzy
When you mentioned a drop of water, I opened it again did following. Though before I had placed a rubber piece but now it's perfect. Thanks for suggesting.



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[Can550]

Getting frustrated
Bike was running fine had also synced carbs.

Then removed carbs to tighten a bolt and put a spring back on.

Now it does not start without choke
Dies when when choke pushed down
Hooked up Morgan carb tune and all the bars are bottom including #2 which is a reference carb.

Mixture screws set at 1 1/2 turn out from fully in.

What should I check/ do


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[RAFster122s]

Air leak introduced when refitting, check over everything and use a mirror if you cannot see.  Or remove and reinstall.  Boot slipped or doubled missing carb causing issue most likely.

[Can550]

Air leak introduced when refitting, check over everything and use a mirror if you cannot see.  Or remove and reinstall.  Boot slipped or doubled missing carb causing issue most likely.

Are the rubber boots (between engine and carbs) directional ?


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[DaveBarbier]

Yes they are. You'll find that one side is not very tight on the head I believe. Just flip them around until you feel they're the right side. I don't believe there's a mark which shows orientation, but you can figure it out.

[Can550]

Thanks guys
First to point out introduction of air/ leak and second one boot direction.

I had #1 and #4 right the other two were wrong. Flipped them all same and tightened the clamps, fired up right away. Synced carbs and smooth, put 4 new plugs (R type D7EA not in stock at dealer).

 


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[Stev-o]

R type not recommended.

[Can550]

I knew it but without seeming i installed and later saw the box. Called dealer and they refused to take these back also said, oh it will work don't worry !

Damn I will have to spend money again

What difference shall I notice though


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[TwoTired]

R type not recommended.

They are for 550s if the plug cap was changed to 5k from 10k.

You won't notice immediate run time differences with the resistance change from stock.  But, the extended spark duration improves economy,  and the lower spark current improves spark plug effective life.

Cheers,

[RAFster122s]

Stick with the R plugs until you need more.  I can understand them not taking back an installed set of plugs...sometimes they do not take returns on any electrical part.

[Can550]

I have ordered D7EA will take 1-2 wks to get

#1 pipe is giving grey smoke and running much hotter than rest 2-4 pipes

I tried to tweak mixture screw but to no avail. What should I check.


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[strynboen]

fuel level...is the easyest to start

[TwoTired]

Look at spark plug deposits.

Verify fundamentals, Gas, air, compression.

[Can550]

Looked at plug #1 and looked brownish. A tiny bit of black and gas trace.



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[Can550]

Carb 4 drain leaks. Would it leak if drain plug O ring was compromised?

Though it's better than my 74 cb550k which drains at the screw/drain plug itself whereas this on drain through overflow tube.




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[seanbarney41]

that fuel level is too high...you want 3-5mm below gasket surface...probably why it wants to leak but I'm not familiar with those carbs

[Can550]

Thanks Sean
I shall try fixing it while still on bike since it is #4.

By the way what do you think looking at photo of my spark plug.


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[seanbarney41]

If that was a full throttle chop, I'd say rich...otherwise just general riding that should be ok.  If the bike performs good, don't worry about your spark plug colors.

[Can550]

It was idle and a bit of riding to 6000 rpm

Went out with the intent to go for longer ride but then less than a mile from home main fuse blew, replaced with a 20Amp and that too blew. A biker passed by, stopped, offered to help, took sample fuses and got two boxes from a part store (very nice of him) but they were all 3Amp, 14Am and 30Amp fuses couldn't use


Walked her home, reached and had probably four glasses of water.

Opened timing cover, it had gone off so adjusted it with strobe light

Ran much better and didn't notice smoke from #1 pipe.

Raining so opened the valve covers and polishing them


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[seanbarney41]

your gonna have to find the cause of the blowing fuse.  Best place to start is the fuse box itself, then the rh switch...