350 wide case ignition timing

[Sigean]

Hi,

Not sure if this has been covered before, but I should like advice and views on the ignition timing for the 350 single used in the Condor motorcycle. I have set the timing as suggested by the (Swiss) manual and this was done statically, checked with a timing disc fixed on the crankshaft. But the engine has a knock on hard acceleration. Whilst this might be symptomatic of other problems (worn little end bush, for example, but at only 35k miles?!), I wondered if anyone had advice regarding the timing. Is there a better timing point to use, perhaps with the auto advance set in its advanced position? Any thoughts welcome.

Kind regards,

Peter

[Jordan]

Try using higher octane fuel to see if the knock goes away.

[Sigean]

Many thanks, but I have tried this, with no effect. And the 350 engine in the Condor is a de-tuned version with a compression ration of only around 8.5:1 as it was designed to run on poor quality fuel, if necessary!

I guess I am asking if the ignition setting should be done statically at 10 deg. BTDC as the (Swiss military) manual states, or if there is a more accurate setting to be used with the auto advance mechanism held on its advanced position.

Kind regards,

Peter

[graeme]

you could try retarding it a little and see if the knock is less?

[Bevel bob]

The Knock could be the big end , don't rev it , a big bang would be bad.An engine with no history should be stripped and the crank serviced.

[Sigean]

Many thanks and I intend stripping the engine soon - better to be safe than sorry....

Peter