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Post by geh3333 on Dec 31, 2015 21:12:30 GMT -5
Actually imnnot so sure the scoot would have died unless it died at idle , so not so sure about that. I'd do the electrical skipage and see how that goes , then if he wants to try it without the belt he can . then of its the same , I'd look at the starter clutch .
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Post by geh3333 on Dec 31, 2015 21:09:03 GMT -5
If the clutch bearings where going bad causing the pulley Not spin freely , that would cause some tension on the belt holding the crank back a little . Its worth a shot " taking the belt off .
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Post by geh3333 on Dec 31, 2015 21:02:46 GMT -5
I'd be very surprised if the belt was the issue " or CVT " . but then again that may cause the scoot to die while riding !!
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Post by geh3333 on Dec 31, 2015 14:41:55 GMT -5
Alright so I just put in the new starter, its trying harder but it spins, catches a tough point and spins again And it's getting fuel there's a bit in the line before the carb now I hate to say this. But your at the point were you need to check the starter clutch. They are pretty cheap also . if you bypassed the electrical and it still does it , then that's where u are . |
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Post by geh3333 on Dec 29, 2015 17:49:35 GMT -5
Sounds good 2 me !
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Post by geh3333 on Dec 29, 2015 8:36:21 GMT -5
You do have a point with the cheaper foam filters . I'm not sure myself , how long they last compared to the way uni filter , but I'm sure its not nearly as long .
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Post by geh3333 on Dec 29, 2015 0:36:35 GMT -5
The fuel pumps and fuel valves are a different animal. In many cases a fuel pump is necessary but with a gravity fed system the fuel valve is just another problem waiting to happen . yes. Many have no issues , but at the same time many do . its just nice not having to deall with any vacuum issues.
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Post by geh3333 on Dec 29, 2015 0:31:46 GMT -5
I would keep a spare mikuni under the seat .
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Post by geh3333 on Dec 28, 2015 22:50:03 GMT -5
There is a lot more to power brakes then there is in one of the vacuum valves. correct. the vacuum booster on power brakes is just one item that make up the brake system, just like the vacuum valve is one item in the fuel system. the vacuum booster is essentially a big vacuum valve. they don't go bad as often as they are being used outside their design specs. the majority of 50cc owners seldom have problems with them. noted for future reference. so, just when are we to take you seriously? To be honest , most that ive seen go bad where on 150cc scoots . not sure if there may be a reason for that . If it seems kind of out there , then its prob sarcasm , lol |
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Post by geh3333 on Dec 28, 2015 22:13:28 GMT -5
There is a lot more to power brakes then there is in one of the vacuum valves. The problem is that the chinese vacuum operated fuel valves are known to go bad pretty often . and the 1800 remark was not meant to be taken seriously .
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Post by geh3333 on Dec 28, 2015 20:51:16 GMT -5
Many have issues with the cheap junk vacuum petcocks , that's why many switch to a Manuel shutoff instead , no vacuum , no worries. U must buy the right electric fuel pump or that will happen . there are many out there with different fuel pressure ratings. my vacuum valve wasn't cheap or junk. it just didn't work right above a certain speed, it didn't maintain the needed vacuum. yes, i'm well aware there are different pumps with different pressure ratings. unfortunately no one has an expert opinion on the matter other than "go buy one, see if it works". it's all good, a manual valve set me up. the only problem with a manual valve is remembering to shut it off. Lol, that's some funny stuff . sorry buddy bit that's the definition of "cheap or junk " . " it wasn't junk , it just didn't work right above certain speeds"!! That's like saying " my scoot is not junk , it just only runs once a year. " or my CD player isn't junk it just plays certain CDs . or my scoot battery isnt junk it just won't work when its hooked up . Like rcq said , those vacuum valves are nothing but a piece of the 1800's thrown into 20th century tech . many times they turn out to be a problem . using a simple design that never gets old and always comes through " the manual shutoff valve" is the way to go . the manual valve eliminates any need for any vacuum lines . u can plug all vacuum lines or just cap off all vacuum ports and not worry about vacuum issues anymore !! |
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Post by geh3333 on Dec 28, 2015 18:19:28 GMT -5
Remember that foam air filters are only semi-permanent and still require replacement after one or two cleanings as the foam starts to break down which happens more rapidly since ethanol came into use. A one cylinder engine develops a pulse that flows back through the intake which is what allows the vacuum fuel pump to operate and mists a little fuel vapor back at the filter which when laden with ethanol rots away at it until it eventually can tear and be sucked into the cylinder along with all the dirt it contains. Myself in the past 50,000 miles of riding scooters instead of motorcycles I have not had a vacuum shut off fail of its own but have had bad vacuum lines and intake parts fail preventing enough vacuum to open them (so far not on the Aprilia though). I've had the same foam uni filter for 20,000 + miles and its still going strong . it wouldnt be worth the $30 for a foam unifilter if you had to replace it after a couple cleanings. |
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Post by geh3333 on Dec 28, 2015 18:08:42 GMT -5
vacuum shutoff valves for 50cc engines shouldn't pose much of a problem. mine never gave any problems. the issue arises with 250cc engines, and probably 150cc too. i simply had enough of the constant WOT then release. twist fully open, then having to close the throttle. finally tossed the vacuum valve and at first got an electrically operated pump. i do not recommend a electrically operated pump. i went to NAPA and got a manual valve for a briggs and stratton engine. you need to be aware of shutting off the fuel EVERY TIME you get off your ride. carb floats usually work pretty good at shutting off fuel flow, but sometimes they stick open. combine that with a particular position of the combustion cycle and you can wind up with an engine full of gas. i finally eliminated all of my vacuum lines except for the air cutoff valve. i would have eliminated that one too but i didn't like my scoot back firing on closed throttle. 6 inches from fuel tank outlet to carb inlet is sufficient for constant fuel flow for a 250, even at WOT. the reason i don't recommend an electrical pump is because of the pressure of the fuel. i found this out the hard way. i didn't get one of my band clamps tight enough and the fuel line to the carb blew off at speed. my chines scoot just up and died, and there i am thinking "what now?" so i park the ride, raised the seat, and started looking around, then finally noticed the stream of gas shooting out of the fuel line. that could have been a very bad situation. OTOH, some type of pump will be required for a tank below the carb inlet. just be careful with an electric pump. Many have issues with the cheap junk vacuum petcocks , that's why many switch to a Manuel shutoff instead , no vacuum , no worries. U must buy the right electric fuel pump or that will happen . there are many out there with different fuel pressure ratings. |
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Post by geh3333 on Dec 28, 2015 18:02:33 GMT -5
Geh333 bike looks very similar to the one in your profile! Mime is also a jonway . |
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Post by geh3333 on Dec 28, 2015 18:01:40 GMT -5
So your engine is turning over and you have spark , that's a good start ! The main thing now is making sure you have fuel and air making it into the chamber. One thing that was mention was spraying fuel into the manifold to see if the scoot starts. If it starts that means its not getting fuel . and that issue is in the carb or possibly the petcock. I always remove the junk vacuum operated fuel petcock and install a manual shutoff valve instead. You can also open the drain on the carb bowl and see if any fuel runs out . if not then u know the carb is not getting any fuel .
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