Help with sick S2R1K please...also posted on Tech in DMF main site

[GraGra]

Even with DP ECU? You know the "hissing" sound I'm talking about? Is that the type of sound you mean? I mean, the coils made hissing sounds, as did the fuel pump, the injectors made clicking sounds, the stepper was silent....I wonder if this coule be the make the beast with two backs up?

[stopintime]

How did the booty call work out?

BTW - glad you're getting some results. I wish I had the insight to be of any help. I'll shut up soon.

[GraGra]

How did the booty call work out?

BTW - glad you're getting some results. I wish I had the insight to be of any help. I'll shut up soon.

Balanced the body(s), checked for a spark, gave her a bit more fuel, fired her up and she was ready to go....

If ever you're over here, let me know. There's plenty of tuning opportunities.

[888906]

If you have access to a gas analyser, set both cyls around 5% CO at idle.

The valve clearances on the front cylinder must have been way out to drop compression like it did - more likely the cam belt was fitted one tooth out?

Anyway alls well that ends well - ride the wheels off the thing!

[GraGra]

I will try to get access to one of these and a carbtune unit.

ANy tips onosetting up CO2 - I mean, let's say I have adjusted the fuel trim already - and the TB's have been balanced - should I just adjust the trim to the 5% level (another helpful person also suggested the range of 4-6%, so this is good and consistent) - or should I first back off the trim, see what I get by adjusting the air bleeds - and maybe get the TB balance out of whack a bit, then go to the fuel trim last?

I mean, what's the best sequence to do this?

Cheers,

[Speeddog]

I coulda sworn Brad Black had a procedure documented over on his site:

http://www.bikeboy.org/performance.html

But now I can't find it. 
 

[GraGra]

I just found a really good write up on the whole procedure, here:

http://www.desmonorthwest.com/forums/showthread.php?s=9ae519ee87248dede3fb339b46e5fd19&t=9263&page=2

So for me, the next step is to get my mits on an exhaust gas analyser, set the proper fuel trim at the leanest pipe using the Technoresearch tool, then tweak the air bleed screw for the other cylinder, as required.

Now...about those coil faults, anyone know how to test the health of a coil???

[GraGra]

I coulda sworn Brad Black had a procedure documented over on his site:

http://www.bikeboy.org/performance.html

But now I can't find it. 
 

I think this might be it....

http://www.bikeboy.org/ducatitps.html

[GraGra]

Ok - the latest on this - take bike out today for a good run, and I can tell fairly quickly all is not exactly right.

Bike starts OK - but feels like there's some sort of miusfire or weak spark. Gets progressively worse through the ride - especially at lower RPM.

Get back home, pull the front plug lead - bike stalls.

Pull the rear lead, bike continues to run.

I stop bike, first pull front plugs, one by one, re-connect leads, earht plug and start bike.

Won't start with only one front plug in,

Will start with only one rear plug in.

Does this likely point to a coil breakdown when the bike is warm/hot - and if so, does this mean the front or rear coil is the weak one? My instinctive answer is front - but when I think about it, it should be the rear - cos the bike fires when the rear plug is removed - but won't when the front one is.

I doubt that a fueling or TB balance issue could cause this type of dramatic effect - correct?

Any thoughts?

PS - condition of the rear plugs was considerably more sooty looking than the front.

[DUCMONROB]

Hi Gra gra,

Just to clarify, the spark plug on the belt side of the heads is fired on the exhaust stroke to remove any unburnt fuel. Sounds like you have a stuffed plug due to the mixture being too rich or something similar. If the plugs were not firing you would have a wet plug.

Rob

[GraGra]

Just thought I'd put the final result up here.

Turns out the bike had poorly adjusted valves, which led to compression issue, and then also badly adjusted throttle bodies.

The coil faults still show up, but the bike runs fine. I guess it's just one of those quirks. It's a Clayton's Fault - the fault you have when you're not really having a fault.

Cheers...

[vossy]

Great to have a result finally.

[mattyvas]

Great that you've got a result.
Sounds familiar the Claytons problem did it myself for a couple of months early this year.