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By Reds
#6250
My brand newly restored 1946 model G was delivered to me today. It has 18 miles on it since the full restoration. I was so eager to get out on her in the sun today..


The gentleman I. Bought her from mentioned the petrol cap being tight so easy when doing it up. After filling her up I had covered about 15 miles when about a mile from home she started spluttering then to a stand still.. I managed to kick her over but when putting in first and letting the clutch out she would cut out again. Fuel line checked ok , no tools so couldn't check the jets so after a mile push home in the heat and gutted she broke down on her maiden journey I put her away and headed in for a late shift.

I intended to check the jets , spark and fuel lines tomorrow when I remembered a hissing sound coming from out the petrol cap when putting the bike away. A phone call to Harvey at Jackson,s knebworth and he said check the petrol cap is,nt blocked. So on getting home i tried kicking her over again no joy then I pocked a piece of wire through the hole all seems well couldn't see if blocked but thought about the man I got her from saying don't over tighten. So a gentle twist on the cap instead of my normal ham fisted approach. Kicked over and fired up put into first and second on rear stand no problems. So I will try her on the road tomoz. Any thoughts if this could have cured it ?? I

Regards Reds
By Ian Martin
#57961
Hi Reds, the hissing sound was probably air getting into the tank. All the symptoms and thinking here seem to suggest you have found the problem and the solution by unblocking the breather hole in the filler cap. With the cap off blowing through the hole with an air line sould also clear any muck out of the way. "Restored" bikes often have this problem through over zealous use of polish. When test riding if the problem returns undo the filler cap and it shoul start again once air gets into the tank allowing the petrol to get down to the carb. Let us know if this has worked for you. Ian
By Tim NZ
#57962
With any rebuilt motor teething issues are to be expected, some of which you have identified..?


Points gap closed up


Timing slipped (see above)


Dirty slip ring


Fouled plug (heat range?)


Jet unscrewed...

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