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Post by tortoise2 on Oct 22, 2017 15:28:41 GMT -5
it's going to sit in my backyard and rust Consider donating the scooter to a high school auto shop. Just a reminder to others researching . . selecting a 50cc still remains the most frequent scooter regret (unless a liquor-cycle situation). 125cc or larger is more compatible with typical traffic. Performance enhancements usually have reliability and aggravation consequences.
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Post by 190mech on Oct 22, 2017 15:54:38 GMT -5
Sorry dude!Maybe it IS time to give up...
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Post by RollingThunder on Oct 22, 2017 18:32:22 GMT -5
I feel for you. I wish I was closer because sometimes it just takes a second set of eyes to figure something out. So let's start over with this thing and get back to the basics. What happened to it before you started wrenching on it, what have you done, and where does it stand as of now?
There are so many threads about it I have no idea where to start. Let's keep this one going until you have a running scoot.
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Post by lostforawhile on Oct 22, 2017 18:59:52 GMT -5
this started with it randomly slowing down and backfiring, I finally figured out my charge coil voltage was way too low, I finally got my stator, after a mess with Amazon, put it in, no trigger voltage,dam pickup with the new stator was bad, changed it to my old pickup, I had voltage again for the pickup. then something is wrong with the starter, probably the bendix, I ended up actually moving the cdi, and rewiring it, and putting in a yahamaha coil and lead, the CDI had failed, the stator had failed,and the coil had failed, all at the same time, they all work now, I have spark, if I kick start the shit out of it, I can get it to run, but it will not idle, if I turn down the idle to where the wheel doesn't spin, it won't run, I have been through the carb at least ten times, it can't be any cleaner, all jets are clear, all passages are clear, the enricher works, the intake is new and it'sealed, I got rid of the o ring crap, and made my own gaskets, which had been working fine, I have 150 PSI compression, I checked the woodruff key, it's not damaged, timing is correct, I have checked the valves at least three times, I have no pair system, competently gone, blockoff plate, the petcock works, I put in my spare anyway, I have plenty of fuel, the carb bowl is full. If I ever get it to run, I had just bought a new gates powerlink belt, as the crap belt failed again too, cost me 30 bucks for the belt. I have an 86 jet main in the carb, a 33 pilot, which worked fine before, needle is set second notch from the top, as any lower it will foul the plug. at the moment it will not run full throttle if I can get it running, which it would let me open the throttle all the way before, I had to lower the needle, as it was too rich, I have 5 plugs and a plug cleaning machine, so if they keep fouling working on it, I can clean them, this has been run all but 200 miles on high octane ethanol free gas , the original carb was destroyed by corn gas, it now has a genuine 19 mm Keihin , it has the original airbox which has no leaks
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Post by lostforawhile on Oct 22, 2017 19:11:10 GMT -5
I'm not allowed to work on it tonight due to what happened I have been wife banned from it
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Post by RollingThunder on Oct 22, 2017 19:35:35 GMT -5
Has it been modified at all?
Has it run ok with the new Keihin carb?
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Post by lostforawhile on Oct 22, 2017 20:00:50 GMT -5
Has it been modified at all? Has it run ok with the new Keihin carb? yea it was ok, other then tuning the variator, I probably have 1000 miles on this carb, this is really interesting, I went and found the no name carb, pulled the jets, the pilot is unmarked, but it had a Keihin 85 jet in it, go figure, so it was running on an 85 already when I got it, but it would run too lean unless it had the four hole plug and air box restriction in. If someone put in a genuine Keihin jet, this bike has some history. It had only 200 miles on it, and my dad bought it from his elderly neighbor. Cheap carbs don't come with Keihin jetting factory
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Post by lostforawhile on Oct 22, 2017 21:34:40 GMT -5
going to put the 85 Keihin jet and the pilot jet that were in the cheap carb in the Keihin tomorrow, I know that carb would run without the restriction I dont know what the pilot jet was but it worked with the 85
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Post by uglo on Oct 23, 2017 11:35:44 GMT -5
Dude.. I thought I was killing myself on my scoot but damn man. You win lost.. you win..
I feel for you on all that work you've been putting in on that thing. I'm not a scoot badass by any means yet but if I were to guess I'd say you have a vacuum leak. Sucks running the stock air box and pipe as that it's restricting the crap out of that scoot. Difficult to so anything to it with all that garbage on their imo.
Rip it off! Modified exhaust.. free flow filter.. then tune that damn carb! Shouldn't be pilot jet at all.
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Post by lostforawhile on Oct 23, 2017 13:05:10 GMT -5
They actually do better on the stock airbox then on an open filter, odd but it's been shown over and over to be true, the airbox can probably flow more air then the engine is capable of using,even with a BBK
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Post by lostforawhile on Oct 23, 2017 13:21:43 GMT -5
It seems that these little carbs are really sensitive to turbulent air, so the intake tube helps smooth the air
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Post by uglo on Oct 23, 2017 14:08:28 GMT -5
It seems that these little carbs are really sensitive to turbulent air, so the intake tube helps smooth the air I thought about that.. here I am about to put a 105 jet in my 20mm with a 50mm bbk lol
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Post by lostforawhile on Oct 23, 2017 15:48:03 GMT -5
That's a lot of jet, you may need to go down, even with a kit, that sounds like a motorcycle jet, mine apparently was running an 85 with the stock carb, and stock exhaust, and still required the airbox restrictions to be rich enough, so something is going on, maybe one of those secret 63 bikes, when it was new it would do 45 stock,gps, so I always suspected it wasn't really 50
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Post by uglo on Oct 23, 2017 17:47:50 GMT -5
That's a lot of jet, you may need to go down, even with a kit, that sounds like a motorcycle jet, mine apparently was running an 85 with the stock carb, and stock exhaust, and still required the airbox restrictions to be rich enough, so something is going on, maybe one of those secret 63 bikes, when it was new it would do 45 stock,gps, so I always suspected it wasn't really 50 Oh no. Would barely top 35 bone stock. I've got no vacuum leaks or air leaks so I don't know. Plug is telling me I'm lean though. Gonna try that beefy jet and see what happens. Scoot would pop and bog with needle in center position.. I put it all the way Down to richer it up. No pop. Going the other way made it way worse. Well see what happens hah
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Post by lostforawhile on Oct 23, 2017 17:54:05 GMT -5
you can upjet but thats a lot of steps to jump
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