Interpol starting .

[nednortonrider]

I've got an irritating problem with a aircooled rotary Interpol. It runs very well BUT after stopping and turning the engine off (stopping for petrol , cuppa tea , or any other reason) there seems to be a 50/50 chance of it firing up on two rotors !!! It seems to be the r/h rotor not starting usually .Whip the plug out and there is signs of fuel but not wet and starting on the running rotor the plug is giving a good blue spark .Put the plug back in and it fires up on two and runs perfectly.
The bike is built as a café racer . Usually it attracts attention if I stop at a biker café and is embarrassing after singing the joys of a rotary engine to then have it start on one !!!! I don't go anywhere without a plug spanner !!! The ignition system is the "mini-mag" from Startright . Any suggestions very welcome .Cheers .Ned .

[kanonkopdrinker]

Ned,

I suppose you have tried the obvious stuff like swapping plugs over to see if the problem then occurs on the other rotor?

David

[johnbirchjar]

I suppose you have tried a new plug?or just swapped the plugs over? What sort of milage has the engine done?and has it been mollied? Is this a recent problem and is it getting worse?More info please ,J.B.

[nednortonrider]

Tried all the obvious ( swapping plugs ,leads ,caps, coils etc .) Engine moly'd and recently rebuilt by Startright. !!! This has me stumped .

[johnbirchjar]

As you say,you've tried all the obviuos.
Did you collect the engine from Graham and put it back in the frame yourself,and if you did,did you re-knew all the "O" Rings?and have you checked everything for tightness?('cos expanding just a nat's when hot could just be enough to drag in air I am speaking from experience )J.B.