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Post by mrsunsett on Dec 14, 2016 0:39:36 GMT -5
Hey gang, back once again to keep yall updated, my pcx cracked a radiator hose... so a small amout of air got into the system after enough leakage happened, so its in the shop (nothing major, and its uncommon to happeb this early, so no charge with my coverage)
What i am really here for, is my wifes Baccio Bro 150cc. I have been using it for a few days now (seeing that the pcx is in the shop) and their is a noise, that i believe is coming from the cvt case, and i believe its the belt thats the culprit, so let me give you the exact scenario.
I drive like an old man, only gunning it and going fulk throttle when needed to avoid stuff and get aroubd something in a hurry, i know that it puts some stress on the motor and the whoke scoot. So i got on my wifes scoot, it has 1560 km on the ODOMETER so its relatively new.
I was first in line at a red light and being in the left lane, i wanted to gun it, get in front of traffic and move over to the right lane, as to be polite to the people who speed (and to just be safe for my sake) so i gunned it and a rattle and clack happened the whole time i accelerated up untill i got to crusing speed and let off the throttle, that has not happened on my pcx... so i was puzzled, and went to a empty side street to investigate. When i accelerate slowly, no noiselike that occurs, but when i gun it, it rattles a bit and goes away.
I am aware that some scooters do thi, as the belt stretches or vibrates from spinning so fast, but i want to know, do yall think my belt is too loose? Is it not the belt? And if it is the belt... its almost brand new, so are their higher quality, tighter belts i can get? Or is it nothing to worry about and normal for chinese scoots???
Thanks for the long read, i would really appreciate some insight.
Will open my belt caseto investigate when i wake up tomorrow, seeing as it is 12:30 at the moment at night...
Thanks
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Post by rockynv on Dec 14, 2016 1:22:52 GMT -5
Could be a number of things from a belt with bad cords to a clutch issue or possibly a sticky variator with a flipped roller but it is a problem that needs to be investigated.
It could even be a defective bearing in the final drive. What's the gear oil level like?
Sure its not pinging and rattling from using too low a grade of fuel?
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Post by mrsunsett on Dec 14, 2016 2:17:35 GMT -5
Could be a number of things from a belt with bad cords to a clutch issue or possibly a sticky variator with a flipped roller but it is a problem that needs to be investigated. It could even be a defective bearing in the final drive. What's the gear oil level like? Sure its not pinging and rattling from using too low a grade of fuel? I only use premium at the pump, necer used anything else. And i make sure my wife uses it.... im sure she wouldent be going behind my back about it since i fix and maintain the scoots. Ill check in tomorrow after i investigate it, ill check for markingson the inside if the belt case, im just hoping its a crappy belt... |
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Post by mrsunsett on Dec 14, 2016 2:18:31 GMT -5
I will change the gear oil as well tomorrow... but i do the normal fillup, fill it till its full and let the excess drop out.
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Post by mrsunsett on Dec 14, 2016 2:20:05 GMT -5
Even though... i have only put about 500 miles on this gear oil... i normally change fluids every 500 miles cause im freakishly ocd about having my scooter have high quality clean fluids running through it.
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Post by rockynv on Dec 14, 2016 12:44:30 GMT -5
Even though... i have only put about 500 miles on this gear oil... i normally change fluids every 500 miles cause im freakishly ocd about having my scooter have high quality clean fluids running through it. Guess I am getting spoiled by my Aprilia. Engine oil and gear lube in the Aprilia are good for 6,200 miles as long as you run motorcycle 4T grade synthetics. Gear lube drains out looking like you just poured it from a new bottle. I was changing the fluids once or twice a month when I had my GY6. |
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Post by mrsunsett on Dec 14, 2016 13:05:46 GMT -5
Even though... i have only put about 500 miles on this gear oil... i normally change fluids every 500 miles cause im freakishly ocd about having my scooter have high quality clean fluids running through it. Guess I am getting spoiled by my Aprilia. Engine oil and gear lube in the Aprilia are good for 6,200 miles as long as you run motorcycle 4T grade synthetics. Gear lube drains out looking like you just poured it from a new bottle. I was changing the fluids once or twice a month when I had my GY6. Just a side note, the clacking only happens when their is a load on the bike. |
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Post by tortoise on Dec 14, 2016 13:51:55 GMT -5
Reconsider if your intention is to post multiple threads on the same issue, as that segments the discussion, complicates finding a solution, and hinders researching.
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Post by mrsunsett on Dec 14, 2016 20:53:51 GMT -5
Reconsider if your intention is to post multiple threads on the same issue, as that segments the discussion, complicates finding a solution, and hinders researching. I agree with your point made, i should have statee that part one would be the problem solving and the part 2 post would be after i solved the issue. Thanks for pointing that tho |
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Post by rockynv on Dec 15, 2016 0:35:30 GMT -5
Does it clack when on the center stand and you give it some throttle with the rear brake holding the rear wheel steady or when you start releasing it allowing the wheel to spin under a load? If it only happens when the rear wheel is spinning under a load and not when the clutch is slipping under a load with the wheel stationary then it may be a bad gear or bearing inside the gear box or possibly the wheel or swing arm extension being loose.
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Post by w650 on Dec 15, 2016 13:36:20 GMT -5
I'll assume you have a long case GY6. www.partsforscooters.com carries a whole range of quality belts for your scooter. www.partsforscooters.com/Street-Scooters-Belts?range=61%2C80%2C92Bad transmission bearing are rare in a GY6 transmission. I had a similar thing years ago on my short case GY6. It turned out that the belt stretched enough to slap the top of the side case and send a vibration. You may also have a broken spring in one of your clutch arms causing the noise. Do you feel the clack or just hear it? |
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Post by rockynv on Dec 15, 2016 23:25:47 GMT -5
I'll assume you have a long case GY6. www.partsforscooters.com carries a whole range of quality belts for your scooter. www.partsforscooters.com/Street-Scooters-Belts?range=61%2C80%2C92Bad transmission bearing are rare in a GY6 transmission. I had a similar thing years ago on my short case GY6. It turned out that the belt stretched enough to slap the top of the side case and send a vibration. You may also have a broken spring in one of your clutch arms causing the noise. Do you feel the clack or just hear it? They usually cause a buzz or vibration when they get sloppy and are the cause of most of the exhaust system failures from cracking. Riders don't put two and two together to see that the GY6 as it has no bearing in the CVT cover to support the outer end of the clutch shaft experiences belt failure because that bearing has gotten weak allowing the clutch shaft to vibrate. When it gets really bad the composite weights on the clutch pads will start fracturing and coming apart. On a GY6 without a swing arm extension you may also find that initially before the muffler itself fails from the vibrations of the bad clutch shaft bearing in the gearbox that it will throw off the inner fender bolted to the muffler. Eventually if let go long enough they will cause the gears to chatter. Its important to chase these types of issues down right away as once they escalate the collateral damage can make it harder to get to the root cause. Sometimes the event that starts it all off is failure to grease the needle bearings inside the clutch along with the shaft the clutch idles on. Too many just wipe the dirty grease off the shaft and put the clutch back on dry with no lubrication for the open rollers inside the clutch that ride directly on the machined surface of the shaft. Sometimes its simple roller clatter however that still involves opening the CVT case and inspecting everything to see whats happening. There could even be a groove on the drive face of the variator from running at one constant midrange speed causing the belt to jump around when it gets caught in the groove however that makes more of a strumming noise than a metallic clatter. This can happen even on bikes with only a few thousand miles on them. |
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Post by tortoise on Dec 15, 2016 23:54:01 GMT -5
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Post by w650 on Dec 16, 2016 7:01:31 GMT -5
The 250 Honda Helix and its clones don't have a bearing support in the outer case either. I'm guessing that Piaggio does.
I'm still guessing that his problem is in either the CVT, like one of the replaceable guides has fractured and fallen out or his belt has stretched and is rattling the CVT. The GY6 is a fairly sturdy unit with no clutch bearing failures in my memory although it can happen, I guess.
Interesting that the video is of another Thailand built Honda. Ungubunga just had the same thing happen on his PCX.
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Post by tortoise on Dec 16, 2016 9:39:21 GMT -5
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