The Superhawk from hell...

Aid3nn · Post by **Aid3nn** » Mon Apr 02, 2012 5:39 am

hmm. well perhaps its time to take a look at why thats happening on mine then! i havent been able to figure it out so far, i suspect the carbs need better balancing; but it goes away when warm. but ill squish that problem eventually when it gets rebuilt and tuned up ;)

Jlovvorn · Post by **Jlovvorn** » Wed Apr 04, 2012 10:26 pm

New genuine Honda needles, needle jets, and floats.

New slow jets, screws, gaskets, and valves.

Redid the float height and checked three ways - Ed line of sight, Honda float gauge, and calipers.

Cleaned the carbs again, and still the bike will not idle without the slide screws turned in good ways.

It essentially only idles on the mains.

The idle circuit just does seem to be working.

I have trace down all the passages related to the idle jet, and they are all clean and clear.

I can't believe this cab was designed so that it wouldn't idle unless the main slides were lifted a far ways.

Something else is wrong.

hillhudson · Post by **hillhudson** » Wed Apr 04, 2012 11:59 pm

did you pull the engine and replace the timing sprocket springs ? or at least tighten em up ?

thats the only thing left to do otherwise.

Jlovvorn · Post by **Jlovvorn** » Thu Apr 05, 2012 6:28 am

That's next on the list.

Have the parts now.

Just need to find the time.

I am not convinced these carbs are right, and fear I will have problems still even after pulling the engine.

rzgkane · Post by **rzgkane** » Wed Apr 11, 2012 10:53 am

How many miles did that motor go to result in that much play.

Jlovvorn wrote:Thanks for the call Ed.

I went out and messured, and I have about 2.5 to 3 mm of play in the cam.

Can someone look at this video and confirm its too sloppy before I throw in the towel?

It will be some time before I can actually pull the engine, and even then I have my doubts about trying it.

I want to be 100% before I take this plunge.

Thanks!

http://www.sendspace.com/file/k77h4a

Ignore all the buttons and "click here" ads and click only where it says "Click here to start download from sendspace" in the middle lower part of the page.

Jlovvorn · Post by **Jlovvorn** » Wed Apr 11, 2012 11:20 am

13,000 on the clock attached, but I suspect this is a Frankenbike.

Compression is at 145, without any obvious sign its ever been rebuilt.

I have a cam sproket from another bike with reported 7k on it that has one of two springs loose, and a spare head with reported 16k that has both springs even looser than mine.

Seems like a serious weakness.

On 70s CBs, the springs can be changed without pulling the engine.

Gee, I wonder why they did that :)

rzgkane · Post by **rzgkane** » Wed Apr 11, 2012 11:59 am

Are new springs easy to get?

Jlovvorn wrote:13,000 on the clock attached, but I suspect this is a Frankenbike.

Compression is at 145, without any obvious sign its ever been rebuilt.

I have a cam sproket from another bike with reported 7k on it that has one of two springs loose, and a spare head with reported 16k that has both springs even looser than mine.

Seems like a serious weakness.

On 70s CBs, the springs can be changed without pulling the engine.

Gee, I wonder why they did that :)

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The Superhawk from hell...