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Post by geh3333 on Mar 23, 2015 18:54:23 GMT -5
Maybe the company that sells the cheaper scale decided to actually charge a few dollars more than what they cost to make ? Like cars , they charge 4 times as much as it cost to build a car at times even more . then they say ",we need to pay the workers " . don't they realize if they sold cars much cheaper they would sell many more , not as many would be repossessed and the workers would still get Paid just as much . |
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Post by mrpalmetto on Mar 24, 2015 10:23:21 GMT -5
Hey Joey.
My first sentence of my post is that I had the same cheap scales that was brought up in the discussion. Maybe you should get a mit and get in the game. On this planet.
My post was just to add that MAYBE a 6$ scale that can weigh 100ths of a gram up to 7 ounces, which is what 200 grams approximates at, may have some variance in it.
The differences that Geh was astutely noticing MAY be because of the ABILITIES of a $6 scale AND some tips for others, that I have observed from using a like product, so it may help them.
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Post by lain on Mar 24, 2015 11:50:01 GMT -5
Maybe the company that sells the cheaper scale decided to actually charge a few dollars more than what they cost to make ? They are not as cheap as he says they are. My friend uses them for jewelry, he says they do not have much of a difference. The cheaper ones will start to give the wrong measurements after a few months if nto used all the time, maybe a month if used all the time. They CAN however be recalibrated and work like new again, a lot of sellers now sell the calibration weights with the scales as well. Oh and he also said keep the scale away from radio electronics, it can possibly make the weight off by a little bit. But how do we do that in our society of everything being wireless? lol The thing is, we're not using the daily, we aren't weighing our rollers after every ride lol the "cheap" ones are perfect for our use. I plan to only use mine when I take apart the transmission for maintenance, otherwise it'll just be sitting in my tool box. |
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Post by ricardoguitars on Mar 24, 2015 11:52:25 GMT -5
I guess the weight changes once they are being used, some might gain weight because of dirt, and others will loose because of wear.
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Post by ricardoguitars on Mar 24, 2015 12:04:01 GMT -5
Maybe the company that sells the cheaper scale decided to actually charge a few dollars more than what they cost to make ? Like cars , they charge 4 times as much as it cost to build a car at times even more . then they say ",we need to pay the workers " . don't they realize if they sold cars much cheaper they would sell many more , not as many would be repossessed and the workers would still get Paid just as much . That's a "Economy of scale", it's what the big players like Amazon, Walmart and the like do, flood the market selling as much and as cheap as you can. The problem with that kind of model is that as a factory you need to build lots of everything and sell it at almost the same pace to be profitable, and for the stores they have to buy big quantities and keep a constant flow of sales to be profitable, it is not profitable for a store to keep a big inventory with low rotation, at the end of the day, a product on a shelf is money you are loosing, so you have to charge a bit more on whatever else is being sold more frequently to make it up for the stuff that has little demand. en.wikipedia.org/wiki/Economies_of_scale |
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Post by scooter on Mar 24, 2015 18:15:20 GMT -5
The 15.03 and the 14. difference kinda concerns me. I'd have to use my dremmel to make them all the exact same weight . fixing the .1g difference may make the variator run a little smoother. How much ? May not be noticeable to the human ear or eye but I would imagine it would be better for the cvt especially in the long run . As the variator spins the weight of the rollers doubles , triples and so on , so a .1g difference soon becomes .2 .4 and so on . I wonder what the weight of an 11 gram roller becomes as it is spinning at 7500 rpms ? We could be talking about a couple gram difference at 7500 rpms , this may be enough to cause an imbalance and an unsmooth rotation ? You should ask RCQ. I'm sure he'd know. |
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Post by mrpalmetto on Mar 25, 2015 8:44:45 GMT -5
I say the weight of that one roller, at full tilt, is heavy enough to push a 250lb man 50 mph with the help of 5 of his fellow friends. :-)
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Post by lain on Mar 25, 2015 12:28:56 GMT -5
Hmm.... I just found my old set of variator rollers that are almost new that I got with my stock variator replacement a long time ago. These do not seem to have a brand name on them, nor do I know where they came from besides the back room of a local scooter shop.
Weighs out as such:
8.48
8.41
8.42
8.44
8.37
8.37
Now those are all practically new, installed them didn't like how they felt when I had the 50cc a long time ago and installed the older weights (the 5g weights i weighed earlier) because these were leaving me at the bottom of hills unable to get up. That isn't the case anymore since now I have the BBK.
It is concerning how a local scooter shop could sell weights they told me were actually 5g, they said all 50cc variator weights they sold were 5g and I would have to place a special order to get any other sizes. Now I believe shops should have scales too and weigh them before they sell them...
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Post by lain on Mar 25, 2015 12:38:04 GMT -5
Could someone confirm for me if I understand rollers correctly. Heavier rollers make take-off harder and makes it harder to go up hills from a stop, but also raise the top speed slightly? Lighter rollers makes the engine able to get to higher revs with less effort, but costs some top speed?
What would the minimum for a 50mm "100cc" BBK be? 8? Would it be dangerous o try my 5g rollers? Would it maybe allow the engine to rev TOO high? Just trying to understand a little bit, I'm contemplating going outside on this wonderful 48 degree day to mess with my rollers lol
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Post by JoeyBee on Mar 25, 2015 12:41:41 GMT -5
That is how I understand the dynamics of rollers/sliders.
Heavier makes the low gears last longer which means slower take off and climbing through gears. Lighter means quicker transition to higher gears for faster take off, but slower top end speed.
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Post by JoeyBee on Mar 25, 2015 12:50:44 GMT -5
As for the BBK 100cc, the math says the weights should be 8grams. But that is just a direct proportion of 12grams in a 150cc.
Through trial and error of weights I found the 12grams limited my RPMs to 7500.
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Post by lain on Mar 25, 2015 12:54:58 GMT -5
As for the BBK 100cc, the math says the weights should be 8grams. But that is just a direct proportion of 12grams in a 150cc. Through trial and error of weights I found the 12grams limited my RPMs to 7500. Yeah my RPMs never reach over 6500. What is supposed to be the max? 8k? |
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Post by JoeyBee on Mar 25, 2015 12:57:35 GMT -5
8k should be the max. Anything past that is very hard on the engine and has a diminished power return.
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Post by JoeyBee on Mar 25, 2015 13:01:22 GMT -5
When I'm street cruising my RPMs stay around 6k. I found the higher RPMs help with a huge hill I have to climb on my route to work.
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Post by lain on Mar 25, 2015 13:11:01 GMT -5
When I'm street cruising my RPMs stay around 6k. I found the higher RPMs help with a huge hill I have to climb on my route to work. Then I'm probably not at a bad setting. I can climb hills like nothing and it only slows down to about 30mph, or maintains if I had speed before climbing. I just always found it weird that even at WOT downhill it wouldn't go much more than 6500rpm |
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difference kinda concerns me. I'd have to use my dremmel to make them all the exact same weight . fixing the .1g difference may make the variator run a little smoother. How much ? May not be noticeable to the human ear or eye but I would imagine it would be better for the cvt especially in the long run . 
