Freshman Rider
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Posts: 75
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Joined: Mar 2, 2013 9:13:10 GMT -5
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Post by endru on Mar 31, 2014 20:15:12 GMT -5
I had had a problem plaguing me for quite some time now and I FINALLY solved it. This is something that almost made me give up on scooting. I had this thread going a while back if you want to read details itistheride.boards.net/post/27669/thread. In a nutshell, I was having major issues at higher rpms, the scooter would barely get over 35 mph without the engine repeatedly cutting out and dropping my speed suddenly. It would make a loud "braaap." It was like fuel was cutting out or the timing suddenly reversed, it was miserable. Getting up to that speed was laborious too, I could feel the engine hesitating. I had tried all kinds of things... new fuel filter, manual petcock, new CDI, new rings, back to the stock head, cleaned the carb, stock exhaust, different octane fuel, jetting and more (not in that order). Nothing made a difference. Just got a new carb, slapped it on, and we're back in business. Easily hit 45, no fuel issues at all. I wish I'd tried that sooner. Can't wait to see what it'll do after I re-mod it. I have no clue what the problem could have been with the old carb. It was the stock carb, the scooter has less than 1,500 miles on it. The new carb is the same size - 19mm intake. My only theory is that the clip on the needle, which was not adjustable, was set fine for a stock 50cc but couldn't cope with the BBK. Either way I'm just relieved it's working again!
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Post by spandi on Mar 31, 2014 20:27:24 GMT -5
Glad to hear of your success.. (does it not feel good when you win?) what was the condition on the float valve?
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Freshman Rider
Currently Offline
Posts: 75
Likes: 0
Joined: Mar 2, 2013 9:13:10 GMT -5
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Post by endru on Mar 31, 2014 20:39:08 GMT -5
I hadn't thought to check that. Just looked at it briefly - it appears to be okay. The float moves freely and the valve comes out of it's seat. Could have been acting up with fuel in the bowl though.
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Post by skuttadawg on Mar 31, 2014 21:08:29 GMT -5
What size main jet are you using . What roller weight ? I replaced the 8gs with 5gs and I had so much more takeoff , mid and uphill on my " secret 63 " and more so with a 50mm BBK , MJ and NGK iridium . Everything else was stock and it was a lil monster . I sold it to a guy who had blew up his scooter and needed one ASAP . He loved mine so much he had the cash in my hand before he could come to a complete stop after a test ride . Yeah the OEM carbs suck with no needle clip , air/fuel screw sealed and I have just a few that had the bowl riveted on instead of screws . Glad you got it running again as it is more fun to ride than push or stare at it . I hear great reviews from the big valve and ported head at Scrappydogs but , yikes its around 150
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