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Post by jerseyboy on Jul 12, 2013 19:48:23 GMT -5
[replyingto=redroush00]redroush00[/replyingto]Get some radiator hose and put a UNI on it,put a UNI on it,put a UNI on it,put a UNI on it,,and oh yeah,,put a UNI on it.... your motor will love you ;D  |
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Post by ltdhpp on Jul 12, 2013 20:18:54 GMT -5
Adjusting the screw doesn't affect fuel for WOT, and could be why the plug is dark.
I would entertain the idea that it needs more fuel anyway, just to see what happens. Try the washer/o-ring under the needle trick at least, if you don't want to get a carb you can adjust. Survey says you need a larger jet to run goodies, and the only way to be 100% sure is to experiment.
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Post by joaoeu on Jul 12, 2013 20:33:49 GMT -5
Try the washer/o-ring under the needle trick at least Speaking of this "washer/o-ring under the needle trick" that I have read for some time, anybody aware of a YouTube video that explains that? Thanks |
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Post by geh3333 on Jul 12, 2013 23:31:09 GMT -5
In my opinion an others on here slightly rich is where many like it and is also comonly prefered .
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Post by alleyoop on Jul 12, 2013 23:45:52 GMT -5
This will help you know what each part of the fueling system delivers and when. And don't believe what everyone says that the Fuel Ratio Mixture is only for idle they are flat out wrong and very easy to prove by the way. Alleyoop  |
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Post by scootnwinn on Jul 13, 2013 0:35:04 GMT -5
Exactly if the mix screw adds air or fuel at idle it is adding the same amount of fuel or air at wider throttle positions. It may be a smaller percentage of the total fuel or in the mix but it is still doing something...
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Post by Deleted on Jul 13, 2013 7:40:31 GMT -5
It seems like our scoots are stuck in a time warp similar to the cars and the 80's...no real new technology. These motors and the way they operate seems to have not changes in a long time! I will love it when computer controlled fuel and air mixtures are mainstream! About the Uni....I have taken this carb apart numerous times and The largest jet i have is an  and it wont run with my setup. The Uni is still somewhat restricted correct? So if it runs good now and i take off the air intake cap and it stumbles thats making it too lean. Im not sure how this type of filter will help. Should be leaner. |
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Post by jerseyboy on Jul 13, 2013 9:03:09 GMT -5
I'm going to have to play with my needle jet a little,,it has more to do with the mix than I thought!
Thanks for that pic Alley!
As for the UNI being restricted,,well I don't think so,,its very free flowing,,Id say its like having no filter at all(almost).
You need to get a bigger jet for the UNI to work,upjet,upjet,upjet!
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Post by ltdhpp on Jul 13, 2013 9:20:53 GMT -5
look ma, I can post graphs too!  Sure, fuel going through to idle circuit may still flow at WOT, but it is incredibly insignificant compared to what flows though the main jet. Turning that screw is NOT going to make it run better if it needs more fuel at WOT due to mods. |
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Post by gitsum on Jul 13, 2013 9:48:52 GMT -5
If you modded/changed the air box and/or exhaust without switching to a larger main jet, you are going to be running lean.
On my stock Tomos Nitro 150 (made by SYM) the 80% to 100% throttle felt a little "flat". Overall the scooter ran very well, but by changing the main jet from 108 to 110, I got a little extra oomph on the top end.
The Tomos Nitro 150 has an air-cooled GY6b engine that cranks out about 10.5 hp, but above 50 mph you have to be patient when accelerating. That being said, when I whack the throttle all they way open at higher speeds you can feel a small increase in speed up to 60 mph, and then it runs out of steam. It can hit an actual 65 mph if you tuck in like a dork and give it a few miles.
I only ride that fast when tuning the scooter, normally I just need it to cruise 50 - 55 mph two-up with a little throttle left, which it does quite well.
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..BAD TO THE BONE..
and it wont run with my setup. The Uni is still somewhat restricted correct? So if it runs good now and i take off the air intake cap and it stumbles thats making it too lean. Im not sure how this type of filter will help. Should be leaner.