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Foam air filter spray?


trialsrfun
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Have recently replaced the Amal pancake air filter on my Cub with a new foam cylindrical type which I sprayed with Castrol filter spray. Now having ridden the bike I think it is running rich and very badly at lower rpm. I removed the filter which seemed to improve things but need more riding time before I will know properly. Do all foam filters need spraying or have I made a problem by doing so, anyone else had running issues after spraying a foam filter?

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Surface area of a foam against a pancake is much reduced. Wash the foam out with detergent, petrol seems to attack the adhesive, and try once dry as there will probably still enough oil still in it.

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I use Castrol Filter Oil Spray. Have done so for at least 10 years. It gets very sticky and will effectively stop dust and particles.

I have found

1 Not to use too much and only at outside of air filter.

2 Let it dry before starting the engine. If wet it can be sucked into small passages in the carb and make problem. I spray the day before I go out with motorcycle. 

I think it is a very good product but takes some care to use. 

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