t2no
Scoot Member
Posts: 55
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Post by t2no on Jul 6, 2014 12:07:31 GMT -5
Maybe I should get this air scoop. Its a bit hard to get a video when u are alone but I will try sometime next week. I am thinking why my scooter is not smoking? The needle is in a mid grove position, jet is quite big, so why there is no smoke??? How to check the oil pump and if it is flowing through the carb?? What might be problems related to oil/ oil pump??? I use castrol 2T fully sintetic oil like this www.trialsbits.co.uk/product_info.php?products_id=1737is it good oil in general?
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Post by chehystpewpur on Jul 7, 2014 8:57:31 GMT -5
moped - drive.google.com/folderview?id=0By2rcNqfITkKRGNCZTRJcWdNSk0&usp=sharingThat folder has some pictures of how I did my air scoop. I used epoxy and I wanna say 4 inch PVC pipe with a 45 degree bend in it. Cut the piece in half and used 1 half for my old moped and the leftovers for this one. It does make a huge diff in operating temps. I dont have exact numbers due to no temp gauge but put it this way. It runs cooler with a big bore and the scoop than it did with a stock cylinder and no scoop. Stock cylinder I can touch the engine after its running. The oil looks to be decent I know a few people who like Castrol for regular engines so their 2 stroke cant be terrible. Its low smoke so it should keep build up down and its approved for injection systems. To check the oil pump the only way I really know is to watch your oil tank and if the level is going down its doing something. It doesn't really push the oil through from my understanding so you can't pull the line off and see it spray out. Vacuum and gravity is the only way it flows I think. If you know how to adjust it you can pull the cooling shroud off if yours needs it to come off. Mine has a notch so I can see everything without pulling it apart. Tighten up the cable next to the pump and you will see more and more smoke coming out of the exhaust if its working. I adjust mine just over the tick mark for where its supposed to be aligned at. Basically where it just starts to smoke a little bit. I use Lucas synthetic and its a low smoke and ash blend so I like to have too much so I always know its working. And the video the actual visual doesn't matter just mostly using it for the audio I've got some videos I took 1 handed on my bikes and it was stupid yes but I needed them for tuning mostly and when I take off I hold the bars with both hands and then take 1 off for the video. Just put that hand back by the air box or exhaust side with the microphone facing it if it was easier to send a sound clip it tell you to just use your microphone.
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t2no
Scoot Member
Posts: 55
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Post by t2no on Jul 7, 2014 17:19:51 GMT -5
Will try to make this video hopefully this week. Thanks for helping out.
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Post by chehystpewpur on Jul 8, 2014 12:22:43 GMT -5
Will try to make this video hopefully this week. Thanks for helping out. I hope you can because that could settle a million questions lol. And your welcome I just like to help with things I can because all the knowledge in the world wont do any good if it doesn't get used and shared. I'm sure this has to be something simple its just a matter of finding it.
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t2no
Scoot Member
Posts: 55
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Post by t2no on Jul 9, 2014 15:10:04 GMT -5
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t2no
Scoot Member
Posts: 55
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Post by t2no on Jul 9, 2014 15:12:59 GMT -5
I have also noticed that the bottom part of the exhaust pipe, where it connects to the cylinder god white a bit. Donno if that is relevant. Also fuel consumption increased, on 4 litres of petrol drove only 60 km.... But I guess that is due to my huge 100 main jet
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Post by chehystpewpur on Jul 9, 2014 17:00:37 GMT -5
Ok the video was basically perfect. Acceleration truly is really slow and it sounds to me like it is waaay rich. Mine is a hair rich by choice and it sounds like your does but not as pronounced. When you moved your camera back to just behind the gauges by your legs and it got loud thats what I was hoping for. If you can do a takeoff or 2 with it by there we should be able to hear what it sounds like as the variator moves and the rear pulley changes ratio. It has a distinct sound when it hits that bog and pulls through when its rich vs lean and I live by that when I tune. I put those results along with plug color and exhaust smell to get the best idea I can. The white on your exhaust is somewhat normal unless its like paper white then maybe its something odd. Possibly a lean condition and way too much heat. Lots of heat and not so much heat a few inches down the pipe as the exhaust cools. Mine does the same but most of it is the crap thats on the road along with dirt burnt onto the exhaust. It sounds as though its hitting somewhere around 7000-8000 rpm though so your close to max rpm just need the right tune to get it to 9,000-10,000 is there anyway the variator or weights and guides wore down too quickly? What about the belt I member it had no numbers on it. I keep trying to think of what it could be and that keeps nagging at me. I have 2 belts that I cant use and their brand new because they refuse to work on my motor. The super cheap one slips when I hit the power band on the stock cylinder at about 25-30 mph. Engine revs up like crazy when it happens but speed stays the same or goes down. Having an rpm gauge helps alot I was hoping you might have one like I do. The other belt is a quing jing or something like that Kevlar one hops and jumps and feels like something is gonna break on launch. It actually cracked its self in between the teeth one time when it did it bad. Bando belt with either 11,600 miles or 6,600 miles smooth as silk but loses top speed every week. New ones in the mail but I'm never gonna use another crappy belt again. If you have an old belt laying around try it and see if anything improves. If its actually better the Bando ones are cheap now about $21 us for me this week.
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t2no
Scoot Member
Posts: 55
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Post by t2no on Jul 10, 2014 8:38:43 GMT -5
It makes sense what you are saying due to 100 main jet, but to me it actually sounds lean, plus no smoke. This weekend I will take out spark plug tu see the colour, I will post it here as well for all your opinions I am starting to think that maybe the problem is with this contra spring. I changed it some time ago and it was quite harder than the stock spring and I think longer a bit as well. Its red one 32 kg. I will try to put in the stock one back and see what happens. And before I changed the contra spring the RPMs were much higher than now. And BTW I put back the old belt and no change. On the video you cannot hear it very well, but from about 3/4 to WOT it makes this whaaaaaaa sound but speed wise does not react. Almost like engine wants to increase RPMs but for some reason something is stopping it. And when I am driving it I can hear/feel this kind of a hiccup sound/feeling, its hard to describe it (whaaahaaahaahaaaaahaaaa... something like that ). Its very small but its there.
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Post by chehystpewpur on Jul 10, 2014 12:35:49 GMT -5
It makes sense what you are saying due to 100 main jet, but to me it actually sounds lean, plus no smoke. This weekend I will take out spark plug tu see the colour, I will post it here as well for all your opinions I am starting to think that maybe the problem is with this contra spring. I changed it some time ago and it was quite harder than the stock spring and I think longer a bit as well. Its red one 32 kg. I will try to put in the stock one back and see what happens. And before I changed the contra spring the RPMs were much higher than now. And BTW I put back the old belt and no change. On the video you cannot hear it very well, but from about 3/4 to WOT it makes this whaaaaaaa sound but speed wise does not react. Almost like engine wants to increase RPMs but for some reason something is stopping it. And when I am driving it I can hear/feel this kind of a hiccup sound/feeling, its hard to describe it (whaaahaaahaahaaaaahaaaa... something like that ). Its very small but its there. That hiccup is what's making me feel like its rich mine does it too especially when its first started and the choke is working. It stops picking up speed and falls on its face for a few seconds. And sputters like crazy but I atleast know I won't lean out going down the huge hills here. Lean has a more hollow BUURrrr sound to it for me when you hit the throttle. Hopefully its just that contra spring because that may be too stiff. With it being longer too it may be binding and catching and not letting the clutch open all the way to let the belt down in there. I noticed yesterday after I leaned mine out a bit more I don't really have any smoke from my exhaust either now when its warmed up but I know everything is working so I'm not too worried. The hiccup could be the belt trying to fall down into the rear pulley and the the spring pushing it back out and closing the pulley. It makes like a wahrr raww wahrr wobbling sound as the rpms bounce up and down. That spring you have is strong if you ask me. 32kg is like 70 lbs and asking an engine that small to fight that much weight and move another 300+ lbs with you and the moped is asking alot in my opinion.
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rexxk
Scoot Member
Posts: 65
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Post by rexxk on Jul 10, 2014 12:55:05 GMT -5
try richenning your taper, 3/4 throttle. and see what goes on. when your at 3/4 throttle and your too rich, go back, until it seems better. 3/4 tuning is just feel it.
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t2no
Scoot Member
Posts: 55
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Post by t2no on Jul 12, 2014 12:58:39 GMT -5
So today this happened Took apart all CVT, changed the contra spring back to stock. This is stock and 32 kg red springs comparison And this is what I found when I took apart vario Locking star was like this
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t2no
Scoot Member
Posts: 55
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Post by t2no on Jul 12, 2014 13:07:16 GMT -5
When I took of the fan the hole in it was like this The rollers were fucked too And when I put them in approx. 3-4 weeks ago they were good. What the hell is going on with my CVT? Also when I replaced the belt and put everything back together and secured the nut the fan and the kick starter star were wobbling a bit, I will post a video later on. BTW it was the same when I changed the vario last time. The nut was screwed all the way and it was still wobbling. When I started it was tight and snug. Does it have to be like this? And some weird noise is coming from CVT, like stones in metal bucket. But only on idle, when I give it some gas it goes away, I dont think it should do that. As well I dont think the fan and kick starter star should wobble. What to do???
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Post by 2TDave on Jul 12, 2014 13:59:41 GMT -5
If you remove a washer between the boss and driven pulley you have to put it on the outside. Also if you run a shorter boss you need to add shims(washers) to keep it snug. Not sure if you did any of that but it should be tight.
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Post by deivydasrnr on Jul 12, 2014 16:49:03 GMT -5
It makes sense what you are saying due to 100 main jet, but to me it actually sounds lean, plus no smoke. This weekend I will take out spark plug tu see the colour, I will post it here as well for all your opinions I am starting to think that maybe the problem is with this contra spring. I changed it some time ago and it was quite harder than the stock spring and I think longer a bit as well. Its red one 32 kg. I will try to put in the stock one back and see what happens. And before I changed the contra spring the RPMs were much higher than now. And BTW I put back the old belt and no change. On the video you cannot hear it very well, but from about 3/4 to WOT it makes this whaaaaaaa sound but speed wise does not react. Almost like engine wants to increase RPMs but for some reason something is stopping it. And when I am driving it I can hear/feel this kind of a hiccup sound/feeling, its hard to describe it (whaaahaaahaahaaaaahaaaa... something like that ). Its very small but its there. i had the same problem, I tried everyting to fix it, changed carbs, piston, but the problem was an overheated cylinder, as this was my first scooter I used to startvit cold and go wot, I always used to push it to the limits. Here are the sighs of an overheated cylinder that I got: when i richen up the mixture it runs better, on 3\4 it runs better than wot, 3/4 to wot it makes a strange, low sound as if it wouldnt be running on high rpm, three air filters in one air box helped as well. So ask yourself now : have you been driving like I have been? How many kilometers has your old cylinder been running?
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t2no
Scoot Member
Posts: 55
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Post by t2no on Jul 12, 2014 19:06:40 GMT -5
If you remove a washer between the boss and driven pulley you have to put it on the outside. Also if you run a shorter boss you need to add shims(washers) to keep it snug. Not sure if you did any of that but it should be tight. Maybe a small diagram would help, because when I try to add washers I cannot put the kick starter star, crank axe is too short...
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