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Post by onewheeldrive on Sept 30, 2017 15:48:36 GMT -5
I thought you put a new clutch and variator on already?
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Post by onewheeldrive on Sept 17, 2017 16:34:06 GMT -5
One time my kick start lever wouldn't spring back up after being pushed down. I removed the CVT cover and found nothing wrong with its return spring. I disassembled the kick start to check everything and found nothing. I reassembled it just as it was before and it worked fine. It's like my scooter is cursed and will randomly not work for no apparent reason. Hopefully this will be the case with the weird noise. It's most likely not because of the kickstart spring. It's likely either the shaft of the kickstart gear (that extends toward the variator when the lever is pressed) needs cleaned and a bit of grease, or the gear itself is chipped causing it to get stuck and not move freely. I've had both happen on separate occasions. Unless maybe yours popped out too far or something that one time only, I don't know. With that being said, I've actually had a noise that I thought, at first, may have been internal engine trouble. All I did to rid of the sound was bump the kickstart lever (not downward-- inward towards the case) a couple times with my foot when it was running, and the noise stopped. I think the kickstart gear may have been riding the variator. |
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Post by onewheeldrive on Sept 9, 2017 1:53:29 GMT -5
I just ordered a belt from partsforscooters Thursday night and it shipped today. I was a bit worried about it being shipped but it did, since PFS is in Florida. The belt may have shipped but I wonder if it will make it out in time with all the traffic jams. Completely understandable, and the belt is the least of my worries.
I wouldn't want to be anywhere near Irma.
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Post by onewheeldrive on Aug 30, 2017 3:52:24 GMT -5
Yeah I felt movement in the rod everytime. It's not something I checked though until the engine was dead. I knew it was something bad so I just rode it until it died, then took it apart as usual.
There isn't anything else in there that moves besides the oil pump. The chain goes on the crank in there.
I'm not really sure what else would make a noise like in that video you posted.
I mean you have the CVT, chain/chain tensioner, camshaft, valves/rockers, piston/cyl, crank, flywheel, oil pump and gear. Then the gearbox and shaft for the rear tire. Kickstart assembly and starter clutch.
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Post by onewheeldrive on Aug 26, 2017 21:37:55 GMT -5
By any chance, did you try grabbing hold of the crank and seeing if you could feel movement in the bearings when you had that problem? I ask this because I did take the flywheel off today and couldn't feel movement anymore. Maybe it's possible the bearings are worn enough that they make noise but aren't noticeably loose when the shaft is pushed up, down and side-to-side. I noticed my spark plug was oily so I thought maybe a piston ring was worn or broken and that's how oil was getting to it and maybe even the cause of the noise I hear. However, I took the top end apart today and didn't see anything wrong with the piston, its rings or the cylinder walls. Only thing I saw was some slight scuffing on the piston. Maybe it's getting in there from a bad valve stem oil seal. I had that happen before. Is there a way to test it? Could I pure oil into the intake port and tilt the cylinder head and see if the oil leaks out around the seal? The head has about 4,000 miles on it. That's pretty crappy if it's seals are worn after only that many miles. I have to admit, it's getting embarrassing now. Any of my friends and family who know about this scooter look at me like I'm one of those pathetic men in a terrible relationship who just won't get out and keeps trying to make it work when it obviously won't. I think it's also getting harder for me because I have had a 2012 Yamaha Zuma 125 for about three years now and have had zero issues with it. I bought it used for $2,099. If someone invested the amount of time needed to keep a Chinese scooter running into a minimal wage job, he could easily make enough money to buy a Japanese scooter and never have to deal with crankshafts and cylinder heads wearing out with less than a few thousand miles. You could probably buy a non-Chinese scooter from the 1980's for the same or less than a brand new Chinese scooter and it would last many times longer than a new Chinese scooter. Yeah you should be able to feel some movement, but like you said, maybe it's just not bad enough to feel much movement. I took another vid back then of side play (variator side) but it was so long ago I can't remember if it was just before or after it completely quit on me, but the movement was pretty bad. It definitely wasn't at the beginning stage. The last few 3 or so times for me it was the rod bearing, so even when I checked the shafts it didn't matter. |
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Post by onewheeldrive on Aug 26, 2017 3:10:02 GMT -5
This video has the sound of my scooter's crank bearing (variator side) from probably 2009. The engine sounds like crap throughout the whole video. The video you posted sounds like it, too. I can't really think of what else would make that sound since your CVT is ok from what you've said.
I know there's been a few times to where I could've easily pushed my scooter off a cliff out of frustration. I'm not sure what all problems you've had, but if they were limited to just the engine itself, a new one should take care of that problem for the next couple of years at least. Maybe even a few more if you don't ride it all the time like I do.
Not really trying to talk you into it, but the option is there if you change your mind.
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Post by onewheeldrive on Aug 24, 2017 3:07:56 GMT -5
I'd at least check for play without the flywheel on to be 100% sure.
How long have you been riding it that way, with that sound? I've had prob 6 cranks go out and once I heard the sound the engine was dead less than a week, maybe less than 2 weeks if you're really lucky, of everyday riding-- which is about 20 miles a day for me during work days. I think the earliest mine went out after the crappy sound the engine makes was maybe 3-4 days.
If you're not a 100% sure about the crank, post a vid of the sound. I've always thought bad crank bearings (any of the 3) in my engine makes it sound like it's a diesel.
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Post by onewheeldrive on Aug 6, 2017 5:51:00 GMT -5
Have you tried running the new air filter with the cover on AND with it off? How does it perform with it on vs off, because it seems like it'd be quite a difference in air flow? I'm not really sure but I almost ordered the same one a few years ago.
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Post by onewheeldrive on Aug 3, 2017 4:13:08 GMT -5
I think I'll always wear a full-face. I have so far since April 2008 when I got my scoot and I'm glad I have.
The last thing I want is for my head to hit the ground at any speed. It's bad enough when you're at home and hit your head on the corner of an open cabinet after putting dishes away or whatever, down below.
There have been times when I haven't wore a helmet, and everytime I don't I get something in my eyes and I can't stand it. Every. Time. It never fails.
I have about a 10 mile ride home every night after work. Sometimes it rains. It's dark. I have 2 12v 18/18w lights that aren't the greatest. The brakes on my scoot are ok, but I feel like the lights and brakes for my small scoot weren't meant for me to be doing 45mph for a pretty good stretch or to be stopping quickly from 45mph if there is a road hazard.
The times when I ride home from work at night right after a decent storm rolls through makes me glad I have a full-face. There are several small hills (one little dip will flood a bit) and turns with trees close to both sides of the country-ish road I take home. Things can come up a bit quicker on me than I'd like in that situation. Of course be careful and drive slower when that happens, but I'm only human and things happen whether it storms or not.... like deer...
I already hit the ground once avoiding 3 deer running out in front of me, breaking my wrist in 3 places somewhere during the probably 25 feet I rolled-- I honestly don't know how far I rolled but it seemed like forever and it was downhill. It's a good thing it was November and I had a full Carhardt suit, winter jacket, gloves, and a hemet on or I would've been screwed probably.
I like full-face with visor down most of the time. I actually thought about using goggles or eye protection in conjunction w/ the helmet just so I can get more airflow on hotter days by riding with the visor completely up, day or night. The vent airflow on some of these helmets could be a lot better. I live in northern Indiana so it's not brutal too often, which is nice. This summer hasn't been too bad, really.
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Post by onewheeldrive on Jul 7, 2017 23:22:44 GMT -5
Maybe the belt and roller change will take care of the problem? Maybe try and pinpoint where the sound is coming from.
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Post by onewheeldrive on Jun 15, 2017 0:18:01 GMT -5
6,000 miles is an EXTREMELY long time to not check your variator, if you haven't ever. Your rollers are probably beyond garbage. Have you (or anyone else) ever had the variator off before?
It also wouldn't surprise me if your variator is shot. Those 3 "v" guides on the variator back plate are hit or miss. Once they are cracked they don't last long, and it will destroy the variator if neglected long enough. It just happened to me again not too long ago.
Definitely check that out (CVT) before you start worrying about the crank. If you wipe your finger in the case and see really fine gray metal particles, it's probably metal to metal contact in the CVT.
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Post by onewheeldrive on May 27, 2017 3:49:08 GMT -5
Dont mod your scooter,thats about as funny as it gets.Only reason I bought it was to mod the living heck outta it!!! Mine runs like an ape!!!! On its 5th season!!!! 6700km and going stronger than ever!! Lol, I thought you were gone for good! Glad to see you post again. |
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Post by onewheeldrive on May 24, 2017 22:23:47 GMT -5
It also sounds like the valve gap/gaps are too tight. Seems to always take forever to start cold when that happens.
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Post by onewheeldrive on May 19, 2017 0:16:49 GMT -5
See if the vent tube is kinked,, that may be a problem it doesnt have a hose.. Its just an open hole with gridded cover Your valve cover nipple has a "griddled" cover? Sounds more like a CVT case vent cover you are describing. |
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Post by onewheeldrive on May 18, 2017 17:07:55 GMT -5
Scrappy sells an accelerator pump for the 139qmb carbs, does anyone know if they are the same pump between most of the different sized carbs? It's $4.
You are talking about repairing/replacing the accelerator pump (stem outside, plunger diaphragm inside of carb) and not the big slide diaphragm (top of carb under large cap), correct? Or, are you talking about the fuel vacuum petcock diaphragm coming directly from the fuel tank?
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