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Post by darkdata on May 13, 2017 13:33:48 GMT -5
I am going to rebuild my Tao Tao 50 engine, looking at going with a BBK (any recommended kits out there?). I know I need a 64mm kit, but should I go ahead and convert to a 69mm seetup? I know I will need additional parts and I am ok with that, but is it worth it? Other than thicker intake and exhaust port walls, anything else?
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Post by 90GTVert on May 13, 2017 15:55:39 GMT -5
How do you know you need a 64mm kit? AFAIK, TaoTaos commonly have 69mm valves.
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Post by darkdata on May 13, 2017 21:35:29 GMT -5
Well I think I should look again. Watching the you tube video titled "64mm or 69mm Valves for 139QMB GY6 50 Scooter Engines" starting at about the 3:25 mark. Now I am looking with just the head off like at the 6:55 mark.
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Post by 90GTVert on May 14, 2017 6:51:33 GMT -5
Definitely double check.
If you do indeed have a 64mm kit, I don't know that there's much difference in the 2 unless you're going to be raising the roof of the ports. Even then, I haven't cut aftermarket heads apart to know if they're the same as the stock heads I cut apart there or not.
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