Author Topic: 56 RR starting when hot  (Read 81 times)

Offline gary

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56 RR starting when hot
« on: 13.09. 2021 19:15 »
hi. when bike is cold fires right up. when it is hot i have to crack the throttle pretty good to get it to fire? it did not have aircleaner on when i got it i did put a pancake filter on. was told when i crack the throttle that is giving more air. any thought? thanks
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Online muskrat

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Re: 56 RR starting when hot
« Reply #1 on: 13.09. 2021 20:47 »
G'day Gary.
That would be right. Cold motors like a rich mix, hence the choke. Warm/hot motors like it lean. You can try leaning off the pilot screw 1/4 to 1/2 turn or a smaller pilot jet.
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'51 A7 plunger, '57 A7SS now A10CR,  '83 CB1100F, 88 FXST .
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Online RDfella

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Re: 56 RR starting when hot
« Reply #2 on: 13.09. 2021 21:06 »
What bike is this? If it ran OK previously without an air filter, then adding one will richen the mixture and require re-jetting of the carburettor.
'49 B31, '49 M21, '53 DOT, '58 Flash, '00 Firestorm, Weslake sprint bike.