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OKO 28mm carb

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Does this carb referred to on other threads fit the standard 191 199 type airbox inlet rubber? Thanks.

It fits ok to the 199b air filter hose and as they all use Bing carbs those bikes should be fine

You'll need the step down inlet rubber from the cylinder as you would with a Mikuni etc as the Bing is a bigger diameter than other carbs.

In Motion sell them

  • Author

Thanks Woody yes I had already bought one for a Mikuni but have for the carb yet.

Hi, I made this table a couple of years ago as a reference. [the measurements are averages as most are 'as cast' not machined- some have a 1/4mm oval variation]

                            Manifold                                    Airbox

Bing [325]            39.5mm                                    45.2mm

Amal[250]            34.5                                          49.1

Inmotion sell all of the above sizes

 

Keihin/OKO         34.8                                          49.9

Dellorto phbl 26   31.0                                          39.4         43.3 [with gasgas rubber sleeve]

Dellorto phbh 28  35.8                                         43.3

Mikuni 28             34.5                                         44

 

i just run the 250 inlet and airbox sizes on mine and it all fits pretty good, with the Keihin

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