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Post by 90GTVert on Jan 30, 2016 13:50:07 GMT -5
It's been sitting on the Battery Tender and collecting dust for the last month. Had some stuff going on and just haven't been that motivated to freeze honestly. I thought about riding tomorrow since it's supposed to be 50 I think... but then a friend I haven't seen for years wants to bring his whole family over so I guess that's out now. About all the riding I've done this month was taking the 150 around the yard to make sure it was in tune enough for inspection. |
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Post by Clank on Jan 30, 2016 14:16:21 GMT -5
OK, correct me if I'm wrong, which is more likely than not, but from what I understood from your gear ratio thread that with a stock gearring a 139QMB physically can't reach speeds higher than about 40 or 45mph? By the equation and peak HP & TQ being around 7400 to 7800 it can't go any faster unless you change displacement, wheel size or gear ratio. Essentially making variator weight only affecting acceleration to a point. Idk if I explained that efficiently but that's what I gathered from that thread in the tech library.
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Post by 90GTVert on Jan 30, 2016 15:50:53 GMT -5
In stock form I think many are limited by power and gearing both, at least to some degree. Tire size would play a role. I haven't had enough experience with 139QMBs in tons of scoots to tell you how common what gears are. If the gears were the same, a long case with a tall tire would have better effective ratio than a short case with it's smaller tire. I know they aren't all the same, but I don't know what has what or even all ratios out there stock. I had a short case with stock gears to just over 50MPH on flat ground long ago, but it was also somewhere around 10,000RPM, with a tall tire, an aftermarket variator that I modded, and so on. My TaoTao that's mostly stock starts over revving around 35MPH. The engine doesn't seem powerful enough past there anyway, but even with a tailwind or hill it's just not going faster without passing reasonable revs.
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Post by Clank on Jan 30, 2016 17:46:15 GMT -5
But technically aren't you just spinning wheels once you've gone past your peak HP & Trq? I mean isn't the engine just spinning faster and not translating to increase forward momentum? Example: to say that the engine will still rev from 11k to 14k but your still doing 48.
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Post by 90GTVert on Jan 30, 2016 19:57:18 GMT -5
Just because you aren't at peak, it doesn't mean there's no power there. Honest conditions, I'm saying my 49cc doesn't have the guts to accelerate past it's powerband at all. I need all it's got just to maintain cruise speeds. With outside influence, there's enough power left to push a little more. It will go faster as RPM increases, RPM just won't increase the same in honest conditions. You could tune it to rev more, but then the CVT isn't in it's best ratio most likely, so you won't go faster or may go slower with more revs.
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Post by sumo210 on Feb 3, 2016 13:32:07 GMT -5
SO i was wondering did u ever find out why it died out on u?? my scoot is doing the same thing but only on long rides and its not every long ride..and i travel about 13 to work with no issues then on the way back itll die once or twice but as soon as it cold for maybe 2 mins sometimes or 5 others it starts with no issues. also it dies just like ur just as i come up to a stop or once it died as i was moving..any help would be really appreciated since i wanna make sure i can take it to and from work with out much issue..
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Post by 90GTVert on Feb 3, 2016 15:12:25 GMT -5
No. I cleaned the carb thoroughly and went over compression, timing, valve lash, CVT and then I could never get it to do it again. I went out trying to get it to stall and couldn't. Everything I went over seemed fine. I still have a CDI under the seat. If you have a spare, carry one. It's a quick swap on mine and I was suspicious of ignition components. You may even be able to carry a coil and swap it out, though if it starts in 2 minutes sometimes I'm not sure you'll prove a lot since it'll take that much time to swap it.
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Post by iwannascoot on Feb 3, 2016 16:27:27 GMT -5
When I had a thermal problem with my wife's Buell Blast, I used canned air to determine what was failing. If you turn these cans upside down and spray them it freezes what it hits. It is a cheap and quick way to test things you suspect are overheating and failing. www.walmart.com/ip/Falcon-Air-Duster/49057390Billy |
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Post by 49dykon on Mar 21, 2016 13:16:05 GMT -5
Have you gotten a chance to ride??? Its still been pretty cold by me hows the weather where your from?
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Post by 90GTVert on Mar 21, 2016 14:35:36 GMT -5
I have had weather that's decent for riding, but haven't got on the TaoTao. I was more focused on getting my motorcycle license on the warm days we had. One day it's 40, a few days later it's 70, a couple days later they said it would snow, heading back to warm, then back to cold... The weather isn't really my problem though. Been working on things when it's been nice out or I rode the 2T. It's kinda hard for me to wanna take the TaoTao and ride around at 30 when I have a perfectly good 70cc 2T right beside it and know nice days and nights are few and far between right now. Good weather should be on it's way though. The pile of notes and clips I have to try and make an update out of is a bit discouraging too. Like I said before, I will get back to it. The project isn't dead.
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Post by cwazywazy on Mar 21, 2016 16:07:21 GMT -5
If I'm correct, the TaoTao is still 49cc and you have said that you plan on putting a BBK in it. What else can you going to do to this thing to improve the speed without going big bore at this point?
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Post by 90GTVert on Mar 21, 2016 17:30:13 GMT -5
I'd like to see what air filters, exhaust, cam, and CVT stuff do without a BBK. I would prefer to go straight to a BBK, but for the learning experience I'll do it the slow way.
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Post by cwazywazy on Mar 21, 2016 17:41:51 GMT -5
As for the cam, I think this is a pretty neat comparison I made awhile back. First vid is 100% stock with the exhaust removed. Second vid is 100% stock except for an A9 cam:
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Post by 90GTVert on Sept 18, 2016 13:07:54 GMT -5
I finally rode this thing this morning, because I wanted to participate in Scoot Tag with it. It's been a long time, and honestly I haven't missed it. I was prepared for it to feel really slow after being used to the 150cc and the 2T all year, but I wasn't prepared for this level of slow. To get everyone up to speed, it sat around the garage most of the year. It ran fine before it sat. In August, I drained the gas out of it and changed the main jet from a winter jet (92 or 95, I forget without going to find the note) to it's usual 85 main jet. I planned to clean the carb, but it looked good so I just did the jet swap. Fast forward a month and I finally rode it because the 2T is down and the 150 is for sale and I turned in it's tags. It started up easily and idled OK. It stalled out when it was cold, but that's normal for it. I got my gear on and took it off of the stand. I hit the gas and it was really sluggish. The wideband was near 10:1 on throttle, so I assumed it just needed to clear out at first. I took it down the road and it was topping out at about 20MPH and getting there incredibly slowly. There's a video below so you can see for yourself just how bad it is. I thought about turning around, but I was determined to get the scoot tag pic. I figured it's just a measly 20-25 mile ride and it sounded OK and was smooth other than sputtering when I hit the gas. I foolishly hoped that it would work itself out, but was not that lucky. I was doing 15MPH up minor hills and topped out just shy of 30MPH once on the biggest downhill of the ride while tucked down. It took me an hour and 20 minutes to do a 22.5 mile ride on back roads with no traffic (WOT the whole time) and I was only stopped for pics maybe 2min total. The wideband stayed 10-11:1 most of the time, so it's rich for some reason. Even when it got to 12:1 (normally a good tune for this thing bounces the wideband between about 12-13.5:1), it didn't pick up speed/power. Everything seemed fine, aside from feeling like it had 1/2 or less of the power that it normally does. It didn't feel like the CVT was acting up and the tach never showed signs of anything slipping. I'll probably end up working on the 2T and finishing that before I even bother to check this thing over. |
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Post by Deleted on Sept 18, 2016 13:39:07 GMT -5
What were your rpm's Brent? They sounded low to me. Mine revs a bit too high and i am going to use a little heavier sliders but, even compared to your other 4T vids, this sound down a few thousand rpm's. Maybe I am wrong?
Heck, I will race you now but, you can't fix whatever is wrong first, ha ha. (Just kidding) Does it fully rev up on the center stand? (Remember not to hold your front brake when removing it from the center stand, ha ha)
Bill
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