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Post by niz76 on Feb 4, 2015 17:51:23 GMT -5
I'd bet a dollar to a donut it's rich ;P
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Post by humanshield on Feb 4, 2015 18:48:41 GMT -5
I'd bet a dollar to a donut it's rich ;P HEY! Don't mess with the Donuts A dollar won't even get a donut anymore unfortunately. The good ones here are $1.60 EACH! Seriously..... May I ask why you came to that conclusion sir? Would running rich cause those drop outs in power at 3/4 to full throttle?
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Post by blaq on Feb 4, 2015 18:55:16 GMT -5
I'm pretty sure it's down to carburetor issues at this point. I think I'll do a plug chop and see what it says. Fairly bad transition from idle speed to cruise. Large flat spot there. I may need a slightly larger pilot jet and/or main jet. Needle is as far up as it will go now. Havent heard any pinging. I'm right there with you man bogging going down a hill or at top speed. Me and you have exactly the same set up going. Any info that you've found useful tag me in it or share I would love to see how the next person is making out with the same thing.
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Post by blaq on Feb 4, 2015 18:58:22 GMT -5
And im at this point in my bbk build correct carb tunning but for some reason I Don think I'm getting it right. If I get home early enough I gotta try and make it to gas station for some fresh gas and air for tire
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Post by niz76 on Feb 4, 2015 19:23:52 GMT -5
I'd bet a dollar to a donut it's rich ;P HEY! Don't mess with the Donuts A dollar won't even get a donut anymore unfortunately. The good ones here are $1.60 EACH! Seriously..... May I ask why you came to that conclusion sir? Would running rich cause those drop outs in power at 3/4 to full throttle? It's a guess based on the "gagging" and the dead spot in throttle. Yep it'll cause the "stutter" or "cutting out" or the drop out in power. A little trick I use to try and see if leaning it out will help is to loosen the screws a little on the air box and jam a washer or something in there to hold it open just a crack. The additional air will lean it out and hopefully you'll feel a difference in performance enough to know if you're heading in the right direction. If that does help, you may be able to remove the snorkel restriction from your air box (If you haven't already) and be in good tune without even having to change the jet! Just some ideas for ya.... Pretty sad what a dollar won't buy anymore!
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Post by humanshield on Feb 4, 2015 20:01:14 GMT -5
Blaq: Just so you know, I LOWERED the needle back down 2 clicks and it didn't really make any difference. I take that to mean it IS running rich as NIZ is telling me. I have a bad flat spot off idle. The only other issue I have is that dang "gagg" thing it's doing.
My carb does have the enrichment pump and I check and it's working, but I STILL have that bog off idle. Just cleaned the pilot jet yesterday. Maybe still something in there?
Anyway, It'll be running along pretty good then BAM....it's like someone puts their hand over the intake side of the carb for a split second. It takes a dive for like half a second (almost feels like I tap the brake, but I'm not), then comes back. At this point I have NO CLUE what that could be.
I just rode it to Harbor Fright and it did better (powerwise) than before. Gets up to speed noticeably quicker. It used to take a while to muster up 30mph but now that comes pretty quick. NOWHERE NEAR a 150cc scooter, but better than it was at 49cc.
If I can just smooth out the carb I'll be happy.
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Post by humanshield on Feb 4, 2015 20:07:14 GMT -5
It's a guess based on the "gagging" and the dead spot in throttle. Yep it'll cause the "stutter" or "cutting out" or the drop out in power. A little trick I use to try and see if leaning it out will help is to loosen the screws a little on the air box and jam a washer or something in there to hold it open just a crack. The additional air will lean it out and hopefully you'll feel a difference in performance enough to know if you're heading in the right direction. If that does help, you may be able to remove the snorkel restriction from your air box (If you haven't already) and be in good tune without even having to change the jet! Just some ideas for ya.... Pretty sad what a dollar won't buy anymore! I may owe you a donut. Ok, Imma try that tomorrow. You know, I haven't ever checked the air filter since I had this scoot. It could be dirty clogged a bit for all I know. I'll remove the intake boot off the back of the carb tomorrow and report back the results. Kinda excited to have it back running and the little extra torque will make riding it much more fun. If I can get these carb issues smoothed out I'll be in "Scootah heaven".
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Post by blaq on Feb 4, 2015 22:46:33 GMT -5
Mine is like that to I'm going to make a video of the issue at hand. Notice how idle screw (not mixture screw) can be turned in and not have a major change in idle today while trying to tune it I notice that if its not screwed in and you pull throttle it would die but if the screw was screwed in further where you can tell the idle raised a little and you pull throttle she wouldn't bog and die
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Post by blaq on Feb 4, 2015 22:51:12 GMT -5
It's a guess based on the "gagging" and the dead spot in throttle. Yep it'll cause the "stutter" or "cutting out" or the drop out in power. A little trick I use to try and see if leaning it out will help is to loosen the screws a little on the air box and jam a washer or something in there to hold it open just a crack. The additional air will lean it out and hopefully you'll feel a difference in performance enough to know if you're heading in the right direction. If that does help, you may be able to remove the snorkel restriction from your air box (If you haven't already) and be in good tune without even having to change the jet! Just some ideas for ya.... Pretty sad what a dollar won't buy anymore! I may owe you a donut. Ok, Imma try that tomorrow. You know, I haven't ever checked the air filter since I had this scoot. It could be dirty clogged a bit for all I know. I'll remove the intake boot off the back of the carb tomorrow and report back the results. Kinda excited to have it back running and the little extra torque will make riding it much more fun. If I can get these carb issues smoothed out I'll be in "Scootah heaven". I did tell you about the filter thing I want my donut to with coffee half & half please thank you lol
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Post by humanshield on Feb 5, 2015 12:24:12 GMT -5
I did tell you about the filter thing I want my donut to with coffee half & half please thank you lol A round of donuts for all those who helped!
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Post by humanshield on Feb 5, 2015 15:39:35 GMT -5
Nooze Nugget UpdateRemoved the airfilter from inside the air filter box and removed the snorkel....BIG difference. The air filter looked like it was the original and was heavy. Looked bad as in probably clogged. Oily. Took it out and it seems to have solved all my remaining woes. And as if that's not enough...it feels like it gained at least 1 more HP and launch and top end are both now in what I would call the sweet zone. NIZ....DONUT FOR YOU Blaq and Mr Admin, Donuts...Donuts and more Donuts. So as the sun sets HumanShield rides off on his monster 83cc scooter finally deciding that hey, bigger really is better Now I gosta figure out what to do for an air filter. I taste a new thread about to be baked.
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Post by jeffwah on Mar 22, 2015 8:39:53 GMT -5
Earlier in this discussion thread, it was mentioned that the new belt caused really bad shaking. I had the exact same thing. I got a nice replacement belt that was suppose to be the exact same size as my old belt. I was also making other adjustments at the time unfortunately. Shortly afterward I was getting a terrible new shake on acceleration. Not knowing that my belt could be defective, I started trying everything like balance my wheels (using balance beads), new wheel bearings, check motor mount bushings and bolts, tighten front fork nut, check all other bolts, buy a new variator and lots of different rollers and now sliders, clutch maintenance, etc. It was a long, frustrating, process. Then when hope was almost lost, just by luck, I tried my old belt and my terrible shake was gone. My guess is that the new belt is defective. Luckily my old belt isn't totally cracked or shredded (but getting there), so I'm just using it again.
So my words of advice, 1) if you have patience, only change one thing at a time. 2) defect belts suck and came be the root cause of any new issues that surface once installed, though always recheck your CVT (i.e. rollers aren't out of place).
BTW - I love this forum. My pit bike TaoTao is my hobby from hell, and without this forum, I'd be lost.
I'd also like to mention when I destroyed my carb after an improper cleaning, adjusting my new carb was a nightmare. I guess it's maybe the wrong size. Anyway, after taking it apart countless times and buying a lot of different jets, I'm now using the following idle/main combo... 34/95, lowest clip level (richest)... a/f mixure screw turn out about double (5 turns out) from stock (2.5 turns out).... (with free flow air filter, lots of engine replacement parts, but no other upgrades on engine or exhaust).
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Post by savscooterdemon on Mar 22, 2015 15:17:30 GMT -5
I belive i may jniw whats your problem is. The engine is starving for air. You put a huge cylinder on with the stock 18mm carb on it. And the stock exhaust the engine can't breath. Go for a 21 mm carb and a sport exhaust and see magic happan
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Post by scooterpimp on Mar 22, 2015 15:30:58 GMT -5
You mean after all this your filter was never checked & was clogged/dirty. Negative 1 donut for you Mr. good to hear your scoot is happy.
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Post by humanshield on Mar 23, 2015 11:34:34 GMT -5
Soon as I can get a REAL 20mm carb Ima gonna.
She's running purt near perfect now. just a teeeee taddle of boggin at about half throttle or during a real slow deceleration from top speed.
Could live wif it as it tis....but...I think there's more there if I get a bigger carb.
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