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Post by Tripper on Jun 9, 2013 23:28:07 GMT -5
I'm haveing ahard time finding a 20mm intake, for my gy6 139qmb. I got a 20mm intake head, and want the manifold to match carb and head.
I'm positive it would be poointless to put a 17mm intake with a performance head , right?
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Sophomore Rider
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Use the force, if it breaks,it nedded to be fixed anyway!
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Post by Tripper on Jun 9, 2013 23:31:35 GMT -5
Well after just doing some. Reverse research on ebay the mounting pins are both 45mm apart on 150 and 50. But if anybody knows better, speak up before I waste any time.
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Post by triker on Jun 9, 2013 23:49:41 GMT -5
Yes, a 150 intake will fit a 50 head. But unless you use a head that has been ported out it will not give you better performance. Also you must use a larger a carb with a larger outlet as the 150 manifold has a bigger diameter inside.
Roy
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Post by indymoped on Jun 10, 2013 3:24:13 GMT -5
DX But a 20mm (50cc) gy6 carb will easily still fit inside the opening of a stock 50cc intake manifold, I bought a scooter from a kid that had shoved a 24mm (125cc) carb in a 50cc's intake manifold, and a 20mm carb meant for a 50cc will be loose in a 150 intake.
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Sophomore Rider
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Use the force, if it breaks,it nedded to be fixed anyway!
Posts: 124
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Joined: May 16, 2013 22:26:39 GMT -5
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Post by Tripper on Jun 10, 2013 7:19:06 GMT -5
Ya I have a ported head, that I striped the plug out, I have new threads for it. But can't find a intake to match, 20mm.
That being said, could I down jet a 150 or a 125 carb and put it on a 139qmb.
This iis my delima. I know ts gota fit snug. Why aren't their more 50cc intake sizes, 19.05 mm is the largest I've found for a 50.
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Post by devo344a on Jun 10, 2013 8:45:15 GMT -5
I bought a supposed chrome intake it didnt say if it would fit the 50cc or not when i got it its to big to fit the 50 the bolt holes are the same but the intake hole is alot bigger and the o-ring is about the size the intake hole is
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