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The TTR250 FAQ web pages -> TTR250 -> Carb stuff -> Float bowl check valve
Post Info TOPIC: Float bowl check valve
mossproof


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Float bowl check valve
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Rebuilding a recently purchased used carb that was in quite a state and in checking the float bowl check valve (little top hat shaped brass thingy that seats into the bowl) found I couldn't blow air through it either way. Much soaking and prodding with a stick, then blowing the air line through it, and it's free, but takes a lot of effort to blow through by mouth.

Question is: How much pressure is normal? Should it be easy to blow through 1-way, in which case I suspect stiff spring issues of some sort. I assume they're not rebuildable (tried tapping the "inner" out, but don't want to hit it too hard in case I damage a seat.



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TTRfan


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Hi Simon. Yes - it takes a lot of pressure to blow them through - quite normal I assure you wink

Brian



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ttboof


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Agree it's hard to blow through.  It slows the flow and makes the squirt from the accelerator pump last a bit longer as the throttle opens rather than dump it in one quick squirt 



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mossproof


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That blew the cobwebs off that thread

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