Author Topic: Carb fuel height  (Read 382 times)

Offline muskrat

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Carb fuel height
« on: 31.05. 2024 22:09 »
G'day Fellas.
It's been well over a year since I rode the Cafe (hip replacement). Even though I drained the carbs (PWK's) they had gum in them so off for an ultrasonic bath. Set the float height to 21mm (the book says 19mm but that's for a carb sitting flat and will flood on an alloy head A10). Bolted them back on, ran on right but not left till I turned the fuel off and after 10 seconds the left chimed in. OK a bit rich that side. Back off and measured the float height and was at the 21mm I set.
I've always been a believer that fuel height is the best way so I set up a jig to put the carb at 15 degrees and measure and adjust to that. I like to have the fuel height as high as I can without flooding. The pic shows it still a bit high so will drop it a mm and go again.
This is also for concentric carbs on an alloy head as if set by the book the float will hit the roof and flood. 
Cheers
'51 A7 plunger, '57 A7SS racer now a A10CR, '78 XT500, '83 CB1100F, 88 HD FXST, 2000 CBR929RR ex Honda Australia Superbike .
Australia
Muskys Plunger A7