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Post by endru on Aug 14, 2013 20:35:25 GMT -5
I need some advice for my next purchase. I'm currently running with what you see in my signature, plus a stock 19mm carb and stock head. I'm wondering what the next best step would be: a 20mm carb, a 50mm big valve head, or something different? My current carb has the drawback of not having an adjustable clip on the needle. I popped the cap on the A/F screw a while back, and there. It also does not have an accelerator pump, which I think might be helpful, but I haven't heard much about them. I would also need a 40mm air filter, my current one is only 38mm. I feel like a larger carb would perform better with my high-volume setup. The stock head is an EGR head (which isn't truly EGR as we all know) and my exhaust backfires a little unless I plug the inlet hose to that system, so I'd like a non-EGR head. I feel like a larger bore head with larger valves might also perform better. The prices for the two are comparable - about $50 for the head or $50 for the carb plus new filter. I can't find the carb I was looking at before that met my criteria, but here's the link to the head I'm interested in: www.ebay.com/itm/Scooter-High-Performance-Racing-Head-100cc-Big-Bore-Big-Valve-Head-GY6-50cc-/161079743341- Not sure if it's 64 or 69mm valves, I need a 69mm valve head. Thanks in advance for any thoughts and suggestions!
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Post by wilds on Aug 14, 2013 23:55:36 GMT -5
I would go for the head first. You will need to re-jet the carb after you mounted the new head.
The adjustable clip on the needle is for fine tuning after you have found the right size main jet.
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Freshman Rider
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Joined: Mar 2, 2013 9:13:10 GMT -5
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Post by endru on Aug 17, 2013 12:56:23 GMT -5
[replyingto=wilds]wilds[/replyingto]Thanks wilds, that's what I was leaning towards myself.
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