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Old 06-26-2013, 03:03 PM   #331
England-Kev OP
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Location: England. Somewhere on the Canal.
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I was going to keep the points, but install a Dyna power box, they just use the points as a trigger..

what are the causes of an irregular timing spark pattern when on the strobe, mine seems to jump about forward and backwards at all revs, how can I smooth out the timing?
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Old 06-26-2013, 03:18 PM   #332
danedg
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You have an irregular spark.
The inductive timing light works well. If it's irregular, then the wire's not conducting, and the plugs not firing.
Check everything and
Replace the plugs. Again....


Edit:
I used a timing light for ignition timing and it was a disaster. It was like a 70's Rock show...real exciting but totally wrong...
I had much better success with the static timing method...
Rotate the crank until the points open.
Bingo
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danedg screwed with this post 06-26-2013 at 03:24 PM
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Old 06-27-2013, 05:56 AM   #333
woodly1069
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Is there a possibility that the weights in the distributor are doing strange things causing the timing to advance and retard?
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Old 06-27-2013, 09:04 PM   #334
MZRider
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Quote:
Originally Posted by woodly1069 View Post
Is there a possibility that the weights in the distributor are doing strange things causing the timing to advance and retard?
Yes, weak advance springs can cause this. So can worn teeth on the cam and distributor drive gears, too much end-play in the distributor shaft, worn bushings in the distributor and a worn cam thrust plate.

Unless the advance springs have been replaced recently, they're past due.
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Old 06-30-2013, 04:26 AM   #335
England-Kev OP
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Originally Posted by MZRider View Post
Unless the advance springs have been replaced recently, they're past due.
I am going to order up some new 8 coil springs, this week

At last a sunny day...

1970 Ambo, by the Thames at Reading.




I seem to have got the ongoing oil leaks under control, I made a new correct size base gasket for the dizzy stand, that is now oil tight, and the cause of the gearbox leak, was some loose bolts on the oblong cap at the back of the box where the adjuster is, I have now managed to get a slim spanner in there and tighten the little suckers up

The whole bike rode so much better today, I am even close to saying it was enjoyable
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Old 06-30-2013, 05:16 AM   #336
woodly1069
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excellent! Now she needs some proper touring!
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Old 06-30-2013, 07:11 AM   #337
England-Kev OP
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Originally Posted by woodly1069 View Post
excellent! Now she needs some proper touring!
I may have spoken too soon! Arghhhhhhhhhh


The oil leak on the dizzy stand has now returned, I can only think now that something in that area is not level, flat or straight. but I will leave it for now. I am going to attempt loading up and going to a rally in a couple of weeks, 200 miles or so, and even if it makes it there and back, I am then going to pull the motor when I get back.

Even though right now the bike runs a whole lot better than it ever has, I have this inkling something is not right, it still feels rough and lumpy, and has a strange noise coming from the L/H side when accelerating. I am really not sure what the deal is with this bike.
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Old 06-30-2013, 07:40 AM   #338
nick949eldo
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Rough and Lumpy

Quote:
Originally Posted by England-Kev View Post
I may have spoken too soon! Arghhhhhhhhhh


The oil leak on the dizzy stand has now returned, I can only think now that something in that area is not level, flat or straight. but I will leave it for now. I am going to attempt loading up and going to a rally in a couple of weeks, 200 miles or so, and even if it makes it there and back, I am then going to pull the motor when I get back.

Even though right now the bike runs a whole lot better than it ever has, I have this inkling something is not right, it still feels rough and lumpy, and has a strange noise coming from the L/H side when accelerating. I am really not sure what the deal is with this bike.
Kev,

If its any consolation, my Eldorado has been rough and lumpy for the last 35,000 miles. Even though I just had the heads completely redone (guides, exhaust valves, skimmed etc.). She is still rough and lumpy.

She only starts to smooth out above 3200 rpm and is smoothest above 4000. Because of the torque, it is easy to find oneself running these bikes like a Harley or old Brit single - way down in the revs and relying on the flywheel effect.

But its an Italian engine - meant to be thrashed, not lugged.

Try running her higher up the rev range and see if she's less lumpy.

Good luck

Nick
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Old 06-30-2013, 08:21 AM   #339
England-Kev OP
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Nick I have noticed it is a lot smoother with a higher rev range, and it does like a dose of throttle, maybe it just doesn't like being in town and running around at 20mph, but then I am not that keen either.

I also notice it wallows a bit on the rear end, Shocks? swing arm? not sure. I have the shocks set on the hard setting, it all feels a little odd. I will get there though.
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Old 07-02-2013, 11:28 AM   #340
yokesman
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for the carb balance ,get the idle right ,then balance them (cables)at your cruise rpm .
i like the carb sync tool we used on the VW back in their days with a trimmed cup to fit over the carb mouth,or just go by ear and feel,but I have not done this for many years and the ear is not what it never was.
as for the leak, a thin gasket would probably take care of your leak.
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Old 07-02-2013, 11:37 AM   #341
woodly1069
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Hey Kev, I was thinking about your distributor leak last night as I rebuilt my distributor. Question for ya, have you ever had yours out of the engine? Reason I ask is that there is a small piece of oil soaked felt inside the housing that is used to keep oil from migrating up out of the engine and into the distributor housing. Mine was only about half as big as it should have been and I'm sure it was causing a leak after 40 years. Greg Benders website has a full tutorial on how to rebuild your distributor, maybe that would be worth looking into...
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Old 07-03-2013, 10:17 AM   #342
England-Kev OP
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Well I may have got to the bottom of the dizzy oil leak problem, and it would appear to be a non dizzy oil leak! but a leak from the oil breather trap, running down the bracket, and onto the dizzy stand. The oil itself appears to be coming out from where the bracket is welded on to the breather trap, so I am guessing the spot welds have failed in that area.
I shall be ordering a new breather box today from Germany.

Today I also fitted a nice new shiny Blue coil, I bought it from my local motor factors, and it was cheaper than ebay.
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Old 07-03-2013, 11:00 AM   #343
woodly1069
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Most excellent man! Glad you found the source of your frustrations!
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Old 07-03-2013, 11:20 AM   #344
England-Kev OP
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Originally Posted by woodly1069 View Post
Most excellent man! Glad you found the source of your frustrations!
I hope I am right, I will know on Saturday when I pull the old part for a good look, I notice on the new replacement breather boxes they sell now, that the little bracket is missing, maybe this was a known cause of oil leaks?
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Old 07-03-2013, 11:50 AM   #345
danedg
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Bracket?

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Originally Posted by England-Kev View Post
I hope I am right, I will know on Saturday when I pull the old part for a good look, I notice on the new replacement breather boxes they sell now, that the little bracket is missing, maybe this was a known cause of oil leaks?
What bracket? My box sits on top of the two hoses for the feed and return lines and carries the overflow tube.
We don't need no steenking brackets!
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