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Post by steve on May 16, 2015 21:39:55 GMT -5
Wouldn't the timing go way off, and it wouldn't run right if the flywheel were spinning? My woodruff key just broke, and it wouldn't run.
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Post by steve on May 16, 2015 20:49:07 GMT -5
You could cut the earth in half with the right sawzall blade. I used to work at The Home Depot, and the vendors for Dewalt used to cut a car in half with a sawzall in 30 seconds on saturdays for show. So, I would think they can cut a scoot frame no problem.
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Post by steve on May 13, 2015 21:48:34 GMT -5
I've been there, man. Over Christmas, the shock on the bottom of the frame of my scoot got stuck, and the frame broke before I knew what was going on. I had another 50cc that was old and decrepit, so I tore it down, and put my scoot on that frame. The body didn't fit on it right, though, so it doesn't look totally right. The floorboard doesn't lay right, and the side panels don't fit snug.
I'm so sorry to hear about your scoot, buddy! Look in the local trader paper. Go to junkyards, pawnshops, etc.
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Post by steve on May 12, 2015 18:37:36 GMT -5
You are spot on.
Plus, for me it's the availability and affordability of parts, and upgrades to try. Once you've held your scooter's cylinder in your own 2 hands, you have a bond with it that cannot be broken.
Of course, the twist and go part is awesome. I find myself marveling at the insanity of people living paycheck to paycheck spending all that money on cars.
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Post by steve on May 12, 2015 18:23:17 GMT -5
I have a Yamaha Zuma, and a Jonway chinese scoot. I also have a spare GY6 engine with a rear wheel and tire attached, sitting on the kickstand in my garage. If something goes really wrong, it's just 2 bolts and a shock to put the other engine on.
I have found the GY6, and the Yamaha pretty similar in reliability. They are basically the same design. The Zuma cost about $2200, the Jonway cost $900. My Jonway actually rides better, and if you compared them both stock, brand new, the Jonway had more power. Yamaha parts are about 3X as much. I don't know that a Japanese "brand name" scoot is necessarily better than a nice GY6. There are some really nice GY6 scooters if you look. It's all personal preference. I happen to really like the Chinese ones.
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Post by steve on May 12, 2015 16:49:35 GMT -5
Also, those starters suck oil in the coil of the motor over time, and slowly get weaker. The starter could have lost speed slowly over time, and you not noticed it. I just replaced mine for that very reason. Try kicking it with starter fluid, too.
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Post by steve on May 12, 2015 16:45:41 GMT -5
I can turn my 50cc , which is now 83cc, by hand, no problem. Exactly as you say. The compression goes out when the exhaust valve opens. Sounds normal to me.
Have you tried starting fluid? Vacuum leaks will make them hard to start, or if you have your idle set too rich or lean. Some motors are just hard to start. You said it was hard to start last year. Did it run OK once you started it? If so, get some starting fluid, and get it started, and check for vacuum leaks. I would try that before I replaced the cylinder.
You can tell your at TDC because there is a little wiggle in the valves. Try to wiggle the set bolt, then move it to where you think TDC is, and give them a wiggle. Sometimes I have to spin it a couple of RPM to get them to wiggle. I don't know why.
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Post by steve on May 11, 2015 14:26:23 GMT -5
If you don't have a compressor, and an impact wrench, get one! You can get a compressor that is fine for a backyard warrior for $100 or so. The 3 gallon pancake compressor works fine. It will run a paint gun, also
I don't know if the 150 clutch nut is the same size as the 50, but it probably is. I've seen it listed as both 38mm, and 39mm. The 1-1/2" socket from Autozone fits perfect on it. I think it costs around $20.
I had trouble trying to compress it, and get the nut back on. I held it on the ground with my feet to take it off, but the same method doesn't work to get it back on. I ended up having to get a buddy get it started while I held it compressed.
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Post by steve on May 11, 2015 13:12:22 GMT -5
You did a great job tuning that thing up. I just did the 50mm BBK on my 50cc Jonway. I put in a 1500 clutch spring(those are a pain to get in the first time. The socket that fits it is the absolutely biggest socket I could find. The nut is a 38mm, but I couldn't find one in metric that big, so I found a 1-1/2" socket, which equals 38.1mm, and it worked!) Some 8g weights came with the BBK, but those kept me at about 5700 rpm, which is too low. The new variator I ordered came with 5g, but those hold me at about about 7300 rpm, which feels too high. I have some 7g ones coming in, and I think if I mix those with the 5's, I will be in the good. We shall see. I also got the 11 pole stator in. I hooked up the 7 wire reg/rect, and it has 3 DC outputs. I'm running everything off of DC, except the enricher, and the tail lights. I have 130 watts of lights hooked up in the front! It handles that no problem. I ride about 35 min in the morning in the dark. I have a little Tim Allen in me, too, because that is probably more than too much light, heh heh. Sounds like we have the same ride and BBK, I found 6.5g weights work the best. Thanks. I had kind of narrowed it down to between 5.5-6.5g, you just made it much easier. Do you have the Jonway with the 12" wheels? If you look at JerryScript's pics at the bottom of his posts; the pic that says "my family's scooter collection", or something like that, the one on the far left, the red and black one, is exactly the one I have. Same colors and all. I love it. The big wheels, and the BBK is all I need. I teach school 1-1/2 miles from my house. I work at a clinic real early some mornings, too, and that is about a 35 min ride, but I enjoy the riding time, when it's not freezing or raining. I have no need for a car. I put earbuds in under my helmet, listen to some tunes, and I am good to go. I have enjoyed meeting all of you. I thought I was some kind of weirdo, scooter-dork. Good to know I'm not a complete social deviant, outcast.  |
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Post by steve on May 10, 2015 18:03:26 GMT -5
I just installed a 50mm, 83cc last wednesday. I got the cylinder, and the valve head. I suspended the bike from the garage door frame at the exact height the kickstand props it, took out the 2 engine mount bolts, kept the back tire on, and just rolled the engine out from under the bike. That gave me plenty of room.
There is massive power in this thing now. I'm still tuning the CVT, but I can hold 38mph going up a very long, very steep hill. Get a 1500 rpm torque spring. You probably don't need any of those little clutch springs. Get a performance variator, and probably 6g weights. I got a great deal on my BBK. Came in the mail 2 days after I ordered. I have ordered from Scrappydog Scooters, and they are great, too.
I didn't really want mine to go much faster, I just wanted it to not slow down so much going uphill. This more than fixed that issue. You won't recognize the scoot after you install. I also got a true 20mm carb. Good luck!
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Post by steve on May 10, 2015 17:37:41 GMT -5
You've got that thing humming, buddy. I was checking out the thread you made on your variator earlier. That's a nice variator. I just ordered a nicer variator, but it's not the really nice kind. I really like the K&S variator , its just a little harder to tune in . this variator is much more sensitive and has to be tuned with the main clutch spring also. The first koso I ever bought was pretty good , but the others were almost impossible to tune and get good belt climb. I was running 9.5 gram weights in the last couple Koso's and that was with a 2000 main clutch spring. You did a great job tuning that thing up. I just did the 50mm BBK on my 50cc Jonway. I put in a 1500 clutch spring(those are a pain to get in the first time. The socket that fits it is the absolutely biggest socket I could find. The nut is a 38mm, but I couldn't find one in metric that big, so I found a 1-1/2" socket, which equals 38.1mm, and it worked!) Some 8g weights came with the BBK, but those kept me at about 5700 rpm, which is too low. The new variator I ordered came with 5g, but those hold me at about about 7300 rpm, which feels too high. I have some 7g ones coming in, and I think if I mix those with the 5's, I will be in the good. We shall see. I also got the 11 pole stator in. I hooked up the 7 wire reg/rect, and it has 3 DC outputs. I'm running everything off of DC, except the enricher, and the tail lights. I have 130 watts of lights hooked up in the front! It handles that no problem. I ride about 35 min in the morning in the dark. I have a little Tim Allen in me, too, because that is probably more than too much light, heh heh. |
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Post by steve on May 10, 2015 6:52:25 GMT -5
You've got that thing humming, buddy. I was checking out the thread you made on your variator earlier. That's a nice variator. I just ordered a nicer variator, but it's not the really nice kind.
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Post by steve on May 9, 2015 0:15:55 GMT -5
I'm pretty sure that white wire will measure 12v DC coming out of the regulator when the engine is on. It is probably for the enricher. If you don't need it for the enricher, you can run LED lights off of it. Put a meter on it to make sure, but I'm pretty sure that's what it is.
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Post by steve on May 5, 2015 14:17:08 GMT -5
Hope you enjoy.
The Chinese scooters are relatively cheap, but I don't think they are crap, at all. They require maintenance, but are simple, sensible modes of transportation that are easy to learn to work on, and parts are easy to get, and inexpensive. Pretty dang smart way to get around.
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Post by steve on May 5, 2015 13:34:15 GMT -5
That happened to me, too. I got a new gear casing, but you could get a tap and retread it to a larger size, and use the appropriate bolt size.
The threads on the gear oil, and oil drain plugs are cheap insert crap.
Just fill it with oil, put the plug in as good as it will get, and drive it up to the store to get the tap. It won't drain out that fast, if the plug bolt will stay in there.
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