Second series 1000 misfiring/backfiring 2 minutes after start-up

Beucars

Beucars

Hero member
Location
Central Europe
Hi All,

Engine (lead free) rebuilt in 2014 by specialist.

Finally homologated 1 month ago and driven 500 fantastic miles since then (max 4.500 rpm).

I did participate in the DGR in Geneva, which was a 25 mile start/stop, 1-2 gear parade. When I arrived home engine started to run on less then 3 cyl (misfiring/backfiring?). Parked it.

Today started correctly on choke but after 1-2 minutes and less choke started with same symtomes again.

Your help is highly appreciated,
Jeroen 
 
New plugs.
Empty float bowls on carbs. Pulled crap through fuel taps if on reserve?
Check valve clearances.
 
You might want to check the balance tube between the carbs as it may be split or come off one of the carbs.. are the manifold rubbers tight and not split so whilst tank is off best to check and make sure.

But then again might just be a bit of crap in one of the pilot jets.. so as per Grant ..
 
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