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Post by retrobrian on May 17, 2014 11:49:29 GMT -5
Ok here is where i'm at;
SCOOT:
I have a 2013 BMS Chelsea 150 cc (GY6 clone) scoot. It is stock except for a performance CDI and coil. It currently has 450 miles. I have done two break-in fluid changes. It runs great except for possibly a faulty enricher when cold... but not an issue.
ME:
I'm a BIG boy. 260 lbs.
ISSUE:
On level ground I can easily get up to 50 mph. I rapidly start loosing speed on hills. On one of the hills, fairly steady and about a 1/2 mile long, it drops to about 35-38 mph.
Like I said earlier, the engine is running great. I'm thinking that changes in the variator and clutch may be in order....just don't know the best set up.
I'm good with the 50 mph top speed, just looking for more consistent hill climbs. Please give me some suggestions .
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Post by alleyoop on May 17, 2014 18:20:24 GMT -5
If going up a hill your rpms start to drop that is your problem, to much load on the motor and not enough RPMS for it to pull the weight up a hill. You want to setup the CVT so that is does not loose to many RPMS just MPH going up a hill. To do that you need lighter weights in the Variator. Whatever gram weights you currently have in there get 2 sets of weights that are lighter for example if the weights in there are 14 gram weights get 12 and 13 gram weights and try each one see which one will hold the RPMS better going up a hill.
Normally 150 motors run well with 11-12 gram weights.
Alleyoop
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All throttle, no bottle.....
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Post by Noneshere on May 17, 2014 18:28:59 GMT -5
Humm, I think you need to up-size to a larger scoot . #300 is like 2 riders on a 150 size bike.
Not sure if any cvt modifications will last even if they did give results .
CN250's are built just like cvt gy6's , they just have water jackets around their cylinders being water cooled.
....and the seats are way more comfortable : ))
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Post by tvnacman on May 17, 2014 18:32:35 GMT -5
I agree with Alley , but I would look at a better carb and jet tweaking .
John
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Post by ramblinman on May 17, 2014 18:57:39 GMT -5
not too many hills in south florida but i can say going over freeway bridge i don't lose speed and i'm not a lightweight.
i have 10.5 gram rollers.
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Post by PCBGY6 on May 17, 2014 19:24:01 GMT -5
Humm, I think you need to up-size to a larger scoot . #300 is like 2 riders on a 150 size bike. Not sure if any cvt modifications will last even if they did give results . CN250's are built just like cvt gy6's , they just have water jackets around their cylinders being water cooled. ....and the seats are way more comfortable : )) If he was talking about a 50cc I could understand upgrading. Being that he has a 150cc his weight shouldn't be a issue when he gets the cvt tuned right for his size and terrain. |
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Post by alleyoop on May 17, 2014 19:47:29 GMT -5
Humm, I think you need to up-size to a larger scoot . #300 is like 2 riders on a 150 size bike. Not sure if any cvt modifications will last even if they did give results . CN250's are built just like cvt gy6's , they just have water jackets around their cylinders being water cooled. ....and the seats are way more comfortable : )) If he was talking about a 50cc I could understand upgrading. Being that he has a 150cc his weight shouldn't be a issue when he gets the cvt tuned right for his size and terrain. Thats a fact jack  |
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Post by nulldevice on May 17, 2014 20:28:22 GMT -5
If he was talking about a 50cc I could understand upgrading. Being that he has a 150cc his weight shouldn't be a issue when he gets the cvt tuned right for his size and terrain. Thats a fact jack For a heavy rider the upgrade speed sounds about right to me. Living where there are hills, and having played with variator weights on a 150 scoot I had, I didn't gain that much and the higher RPMs killed the motor rather quickly. I assure you weight is the biggest issue there is when going up hill. A 260 pound rider is going to go up hill one heck of a lot slower than a 130 pound rider regardless of the variator tuning. My experience showed if you are large and want to go up long, steep hills at 50 MPH or more the cheap way to go is sell the 150 and get a 250cc class scooter or larger. Start messing with the carburetor, exhaust, variator weights and clutch springs or whatever may be fun if you like garage time, know what you are doing, have the tools and place to work on it, but it tends to shorten the life of a motor that was running well before you started "fixing" it for very little gain. Still, I had fun doing it.  |
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Post by PCBGY6 on May 17, 2014 20:34:15 GMT -5
Thats a fact jack For a heavy rider the upgrade speed sounds about right to me. Living where there are hills, and having played with variator weights on a 150 scoot I had, I didn't gain that much and the higher RPMs killed the motor rather quickly. I assure you weight is the biggest issue there is when going up hill. A 260 pound rider is going to go up hill one heck of a lot slower than a 130 pound rider regardless of the variator tuning. My experience showed if you are large and want to go up long, steep hills at 50 MPH or more the cheap way to go is sell the 150 and get a 250cc class scooter or larger. Start messing with the carburetor, exhaust, variator weights and clutch springs or whatever may be fun if you like garage time, know what you are doing, have the tools and place to work on it, but it tends to shorten the life of a motor that was running well before you started "fixing" it for very little gain. Still, I had fun doing it. I have a very mild built 50cc and I weight 250ish. Are you saying I'm to fat for my scooter? I can run 45ish for long stretches. Seems to me that a stock 150 would do fine as I have stated before tuned right. |
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Post by alleyoop on May 17, 2014 20:47:07 GMT -5
People just throw out stuff when they really don't know what is what. See my Trike in my sig it is a 2009 150 Ice Bear Trike which I bought back in march of 2009. It weighs 350 and I am 180lbs and I am not counting the tools I carry under the seat. It is a 157QMJ GY6 motor and I have the CVT tuned to go up some hills around here and hold the RPMS keeping the power up and at the top of the hill the rpms may have dropped 100-200 and that is all. I can hit the bottom of the hill doing 50mph and loose only 5mph when I reach the top BUT here is the thing I still have throttle left so If I want to keep the 50 going up the hill I just give it more throttle. Alleyoop |
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Post by nulldevice on May 17, 2014 21:21:22 GMT -5
OK,OK trolls, I'll bite. You scooters put out power beyond all reason. What I really think is any or all of the below: 1. You are looking at the kilometers per hour scale 2. Have an uncorrected speedometer that reads 10 to 20 percent too fast 3. With a motor that has been modified from stock 4. You live in Florida, and don't have a clue what a real hill is, or have forgotten. Or, you have found your way to Xanth. That's it from me, I'm done with this thread. Have fun, trolls.  |
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Post by retrobrian on May 17, 2014 21:59:29 GMT -5
Wow...name calling isnt necc. yes im big. i didnt buy the 150 for transportation. more for fun. If I really need to get somewhere... ill drive my Jeep or my Harley. This is for fun and I enjoy tinkering. so null device...RELAX
now for the rest... it s a BN157QMJ fron Znen...or something like that. what would the stock weights be in the scoot?
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Post by alleyoop on May 17, 2014 22:03:56 GMT -5
Nulldevice is known for saying things he doesn't know anything about , so take his comments with a grain of salt.  Alleyoop |
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Post by retrobrian on May 17, 2014 22:09:48 GMT -5
OK Alleyoop
I respect your responses. I followed your intructions on drilling out to the air/fuel mixture screw and the scoot idles like a champ now when cold
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Post by alleyoop on May 17, 2014 22:23:44 GMT -5
Great!! good that it helped your problem, starting in 2012+ they started plugging up even the 150 carbs and on the 250s at least they just put on a plastic cap that can easly be taken off so you can adjust the LEAN condition they set the carbs to so they can pass emissions. I don't understand why the EPA makes them do that since in different parts of the states and countries for that matter the motors cannot run with such a lean setting. But at least the plugs can be drilled out or you can buy an aftermarket carb with the screw not plugged.
Alleyoop
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..BAD TO THE BONE..
Main Jet
