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Post by aeroxbud on Jul 18, 2013 20:17:54 GMT -5
Looks like this scooter wants to fight you all the way Brent
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Post by 90GTVert on Jul 18, 2013 21:17:50 GMT -5
I love scoots, but I think they hate me. lol Sooo slight changes in any of the many components will vastly change how a scoot performs..I feel its worsened by low power engines I agree... small displacement stock stuff just can't pull through weak spots, especially with someone my size riding. |
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Post by 90GTVert on Jul 23, 2013 8:41:33 GMT -5
I've been swapping some stuff around while it was really hot and taking short test runs, just a few miles. The NCY torque driver appears to have roughly 50 and 53 degree grooves. The 53 degree grooves seemed to give me the least spread of RPM while accelerating, so I went with that. Took it for a test run last night with 4.5g sliders and a 1K contra. That was the setup that worked most like it did before as best I could tell.
Leaving, it seemed like I had it right. I was averaging 33-34MPH at around 7800RPM, right on target with where I was before the CVT issues started. I did notice that on my way to the other town I always ride to on the longer test rides, that I never saw elevated speeds really. It would cruise between 32-35MPH, but normally I see upper 30s peaks at times. I thought maybe it was wind affecting that. When I got to town and started riding around, it was apparent that RPM was dropping off some and that this setup is not as responsive when changing speeds. On the way back home, speeds were 30-34MPH with RPM ranging from 7300-7600. It did feel like I had a little headwind, but I don't believe that's all it was.
I filled up and saw that I only got 87.5MPG, when normally I have been in the 90s. It also just felt like it was under more load all of the time. I left the gas station and went up the road a bit the same direction that I had been traveling slower. Then I turned around and still speeds and RPM were a little off. I tucked down and only made it to 36.6MPH before I gave up.
I did see that air/fuel readings were a little richer than normal last night, and every time I accelerated from a stop I had a bad stumble/sputter from the richness. I don't really think that's the big reason for my troubles though.
This is very much like what I've experienced with my 2T projects when there's a torque driver issue. It really shows just how important every aspect of the setup is and every angle and the smoothness in TD slots. It's also really quite annoying when trying to have a consistent setup to try things with.
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Post by 2strokd on Jul 23, 2013 11:18:33 GMT -5
Hate to bother you with it.. But the next time you have the NCY TD out can you give me some of the measurements? Like the total OD of the pulley and the ID of the ramp side..
I would like to try one on my Cobra if possible..
The Kmyco Cobra, Super 9,8, People, etc all use the same CVT set-up as a GY649cc. At least the complete Vari, crank splines, etc are the same, not 100%sure about the rear pulley? Seems like from memory the GY6 rear pulley is smaller?
Mine shifts the same as you describe tho.. The BB torsion control helps allot until it gets dirty from belt dust, but you will still have RPM dips just not as bad. Smoother transition...
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Post by 90GTVert on Jul 23, 2013 11:51:13 GMT -5
This may be of interest... scooterinvasion.net/forum/viewtopic.php?t=2956I can still get measurements when I get it apart next though. It's really close in pulley OD to the stock GY6 50 TDs. Otherwise, I don't know any of that off the top of my head. |
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Post by smokymance on Jul 23, 2013 11:58:56 GMT -5
Man...that looks great with all those gauges!!!!!!
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Post by 2strokd on Jul 23, 2013 12:28:28 GMT -5
This may be of interest... scooterinvasion.net/forum/viewtopic.php?t=2956I can still get measurements when I get it apart next though. It's really close in pulley OD to the stock GY6 50 TDs. Otherwise, I don't know any of that off the top of my head. Duhhh  .. Thanks for reminding me... LOL, you will see i even posted a "Thanks: on that post..  |
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Post by 90GTVert on Jul 23, 2013 15:10:54 GMT -5
Doubt you need 'em now, but the TD is 118.5mm OD and 34mm ID where it rides on the other half of the pulley.
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Post by 90GTVert on Jul 23, 2013 15:31:06 GMT -5
The TD was slinging grease outward onto the CVT cover. When I pulled it apart to measure and look at that, it's pretty clear the spring base/cover is spinning. Looked at pics I had taken before installing this on the TaoTao and there were no marks.  While I was out last night I noticed that it was a little odd taking off. As I mentioned earlier, it was sputtering. Felt like more though. I checked today and the front brake was dragging a little worse than it normally has been. Not bad, but I could live without it. I had a caliper that was on my Venus and it fit with a little work. I bled it and there's still a little drag, but I haven't even rode it yet so I'm hoping it'll wear in and work better than the stock caliper. It's gold so it's gotta be better, right?  I've also been getting some vibration at 30-35MPH... right where it cruises. I don't recall it being as bad when I first started riding the TaoTao, but I had some DynaBeads around so I figured it's worth a shot. I've had mixed results from them. My opinion is that good tires are the best option. Those are not free like my leftover DynaBeads though. I added about 1oz to each tire.  I had planned to run up and down the road today and see if I could get anywhere with the TD, but it just hasn't worked out that way. Obviously something's gotta change to keep that spring base from spinning. Not sure if I have another base/cover around that works better with the NCY or not. I used that TD on the SunL and didn't have it sling grease or spin that I know of. I should have a Hoca bearing base very soon since I ordered a few days ago. I was hoping to have a good working setup and then add the Hoca to see how much it improved, but this thing is being a pain so it may have to be a crutch. |
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Post by aeroxbud on Jul 24, 2013 5:49:01 GMT -5
Has the tyre moved round the rim? There should be a mark on the tyre that lines up with the valve stem.
Perhaps all that power has spun it round!!
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Post by grikjames on Jul 24, 2013 7:30:17 GMT -5
I noticed on your TD it says for dio. Whichis for a different engine. Those use a much shoter belt but wider.
But i guess if it fits it should work right?.
Just giving some thoughts.
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Post by 2strokd on Jul 24, 2013 10:48:27 GMT -5
I use some sealant/adhesive on the spring cup, or its a 50/50 shot it will sling grease. In my cases anyway... I use some RTV, or something of the same nature on the spring cups. Let it cure good or it might sling out as well?, im sure you know this though. The BB torsion controls always need sealed up good from my experience. Some seal on there own. Some dont... I just seal em all now. Beats the snot out of a greasy belt!  |
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Post by 90GTVert on Jul 24, 2013 13:57:27 GMT -5
I actually had tried RTV and it didn't do anything for me. The only good thing is that is slings the grease out to the CVT cover and everything else somehow stays clean... at least for the rides I've done which are only 30 miles. A lot of parts for the 139QMB are labeled Dio, since I guess it's a ripoff of that Honda CVT. I'm hoping to try a bunch of test runs with different setups, just haven't had the time to do it. I get in the garage and within 5 minutes every time my grandmother needs the wheelchair or something. Can't even take test runs just down the road when she's like that. Been that way the last few days, but I've got my fingers crossed that tomorrow may be better.  |
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Post by 90GTVert on Jul 25, 2013 8:48:01 GMT -5
Temps are nice and cool outside (huge change) and granny is sleeping... but now it's gonna rain.
I got this YouTube comment regarding when I removed the inlet and restriction from the airbox....
"one thing you did was removed the hose from the air box do not do this instead leave the house with the cap for stability and remove the filter in the air box. after removeing the stock fome filter buy a 38mm coin filter and slip it over the end of the hose you removed this way you will get more airflow and better performance the stock fome filter restricts air intake but in most cases you still need the hose and box "
That's a new one to me. Sounds like he's saying gut the airbox, leave the snorkel, and install a cone filter on the snorkel. I keep hearing that the stock foam is so restrictive... but I went up from a 75 to a 90 main jet by removing the restriction and hose. If the filter is the big restriction, I wouldn't think I'd be at nearly the same jet size as many report with a UNI. Eventually I will try a UNI and see if there's a difference vs the stock box. Not sure I'll be bolting it to the airbox though. It occurs to me that in that scenario it would make more sense to just get a filter that fit over the inlet without the hose should you wish to try that. Why hang it from the end of a hose that's just clamped on other than I guess if you're trying to route it away from outside elements? Seems like that's just introducing an extra potential point of failure with a filter hanging on a hose with no other support.
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Post by 2strokd on Jul 25, 2013 9:14:03 GMT -5
lol about sums that youtube comment up for me.. Ive used ThreeBond with luck on the spring cups as well  |
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.. Thanks for reminding me... LOL, you will see i even posted a "Thanks: on that post.. 
