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Post by jasong on Mar 1, 2014 21:27:04 GMT -5
Hey folks, So I installed my 10g sliders today, found out the original rollers were 13g. My RPM's now peg, whether uphill, or flat, at between 5,800 and 6,100. My 0-40 is pretty fast, but my top speed on a flat has gone from 55ish after I fixed my a/f mix to around 51. I would be 100% happy if I had this acceleration with my previous top speed, but I realize that is a slight tradeoff. The other issue that I hoped would resolve itself is hills. I'm still dropping speed fast on hills, but my RPM's are staying constant. Does that indicate the need for a new contra spring? I'm willing to mess with performance variators and such if it'll solve some of my problems. I'm also willing to go lower with my weights to get those RPM's up (6,000 aint 7,500 haha), but don't want to lose more top end  Advice? Discounted parts that you don't need anymore?  |
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Post by jasong on Mar 2, 2014 15:15:57 GMT -5
Also, the rattling sound I've been getting when putting the bike under torque is definitely the belt hitting the bottom of the CVT case between the clutch and the variator. I replaced the belt when I replaced the sliders, original was an 835-20-30 and I replaced with the same size Gates Powerlink. However, when the belt was on, there was slack at the bottom and when I pulled the throttle with the cover off, the slack would go away, but come back when not under torque. Is this part of the problem as well? Need a smaller belt?
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Post by jasong on Mar 4, 2014 18:07:46 GMT -5
Bump.
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Post by alleyoop on Mar 4, 2014 18:26:04 GMT -5
WOW!! I have to tell you something is NOT right, going from 13g to 10g weights and you only picked up around 800 rpms is about half of what you should have picked up. Something is not right in the CVT or your compression is down on that motor. Is this a GY6 157QMJ or what motor is in there, it will be stamped right under the cvt on the case itself. Heck if I put in 10g weights mine will go over the red line turning 8500 rpms the motor is screaming I run 12 gram Dr Pulley Sliders with a KOSO 115mm performance Variator that you can get from TVNACMAN.
Can you take the CVT cover off and not start it and take a picture and also a close pic of your Variator.
Alleyoop
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Post by jasong on Mar 4, 2014 21:37:10 GMT -5
Here's some I took the other day, I'll have to take it apart again to get a picture of the CVT. imgur.com/a/Z5VMnI'm going to recheck my valves, I wonder if I didn't adjust them right the first time. Engine is a 157QMJ 150cc GY6 |
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Post by alleyoop on Mar 4, 2014 22:04:59 GMT -5
I think you need a Variator look at the ramp angle and thickness on the edge of yours compared to the ramp angle and thickness on the KOSO. Also this is a 115mm diameter face look at the extra actual face area sticking out. Alleyoop  |
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Post by jasong on Mar 4, 2014 22:19:18 GMT -5
Not sure I can tell from the pictures but I'll certainly look into it if you think it'll help. Is TVNACMAN a user on here, or a website?
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Post by tvnacman on Mar 5, 2014 6:08:15 GMT -5
Jason , I got your PM this morning . I over looked this thread . What is your body weight (I hope your not a girl) this effects the dinamic of the cvt . Will this engine make upper RPM on the center stand ?
I skimmed this thread Jerry nailed it did you check your valves what is the milage is this problem new ? RE check your valves . I saw Alley gave advice on carb adjustment listen to him and give him all the info he asks for do as he instructs .
I don't like stock carbs , or stock variators . You might have some binding in the cvt Get alley the engine number .
Jojn
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Post by jasong on Mar 5, 2014 15:53:56 GMT -5
Thanks for the response. I'm a 180 lb man with maybe 5 pounds of extra gear on the scoot. Ideally I'd like to replace the carb with a better one, and upgrade some variator parts. I have no clue where to look for the carb, I've poked around a little and don't know which ones would work with my scooters setup, or what size mine is currently. The carb's float bowl has torque-broken screws on them, I'll drill them out and replace with the correct size if changing the main jet will help and will be cheaper than buying a new carb. The carb seems to be a major issue, as some rides I'll hit 55mph no problem, and other rides it starts really slowing down at 40mph. When it warms up I'm going to check my valves again. The scooter has 1100km's on it, and this has really been a problem since I first go it with not having phenomenal acceleration, rpm's not getting over 5,000, etc. The cvt has always made a noise like the belt is slapping the cover, and there is a mark on the bottom of the cover from the belt hitting it. So, I'll check valves, make sure my carb is tuned correctly. If this were your scooter, what would you look at replacing next (keeping in mind a college budget ) |
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Post by tvnacman on Mar 5, 2014 19:55:02 GMT -5
Jason , after we spoke I realized I don't have a feeler gauge home . I did look on harbor freight the valve lash .004 is inch not mm . I forgot to ask if you have an impact gun ? I would check the clutch if the contra spring is weak it would slack the belt and cause fast shifting . If you doubt the spark plug change it , a few $ is not worth spinning your wheels chasing a problem . If the plug was good now you have a spare that you should have had anyway .
John
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Post by pepboyjoe on Mar 8, 2014 17:18:53 GMT -5
Hello,
I also have a TaoTao evo 150, the little cap on the side of the carb you can remove it very easily with out removing the carb, You take a small size flat head scre driver like a 1/4 in head and on the carb you put it on the edge of the aluminum around the screw about 1/16 and tap it softly it will dig in to it and pop the cap off it does not hurt your carb at all I did it with a couple of 150 taotao evo I put together once you have that out you don't have to put it back in, Remember its just a little part of the screw driver you are puttin gon the carb do not try it putting the flat head on it horizontal to the crew, hope it helps.
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Post by jasong on May 18, 2014 10:46:54 GMT -5
Hey folks,
So, with Johns help from NYC Scooter (Thank you so much!) I got a new pod filter and carb put it. Totally transformed the scooter. Now, after riding it for a few months, I'm ready for more upgrades and tackling the last few gripes I have. First, I put 10g sliders in the CVT and it definitely helped. However, I'm still topping out at 6100RPM's during acceleration. On a slight downhill I can make it to 60+ on the chinometer and RPM's hover around 6,600-6,700. With this in mind, I want to go lighter on the weights. John had mentioned doing a performance CVT and upgrading the weights at that point and that may be what I do next.
Hill climbing has improved, but I still lose between 5-7 MPH while climbing. Should I go with a stiffer spring at this point? Is the red one the one I want?
Gas: I see this argued everywhere. I'm in Raleigh, NC and use Premium every fill up. The times I've filled up with regular I get a noticable drop in acceleration. Can this be solved with one of those fancy advanced timing CDI's and let me use regular and have the same performance?
Exhaust: Will I see any gains from adding an aftermarket Ebay exhaust? I may just do it for the sound, but wanted to know what you all thought.
Thanks for the help!
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..BAD TO THE BONE..
