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Post by steve on May 24, 2015 9:45:28 GMT -5
I installed a 1500 torque spring in my clutch. I timed the acceleration, and from 0-30mph, the torque spring slows me down about .4 sec. IMO, the torque spring does just that; it increases your torque, but it makes your scoot like a diesel. High torque, slow acceleration. It opens every time you start to get some momentum. It does probably save your engine some wear in hilly areas, but it decreases performance, in my case, at least.
Thoughts?
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Post by cyborg on May 24, 2015 10:21:52 GMT -5
depends on what you have for terrain where you are,,,if you have a lot of flat runs it would suck,,,but you'd love it if theres a ton of hills,,,it's not what you'd want if it's clipping the topend if thats what you're after
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Post by ricardoguitars on May 24, 2015 11:29:05 GMT -5
Softer spring means better performance uphills, am I right? or is it the other way around?
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Post by lain on May 24, 2015 20:36:10 GMT -5
I went from 1500 to 1000 rpm spring on my 100cc bbk and found yes, softer makes you climb hills faster, and improve get-go power on hills too, but increases wear on the variator when you are in a place like Boston where it is only hills. A heavier spring will save your parts, may decrease your lowend, but may also increase your top end, as I found a slight top speed decrease with the 1000.
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Post by geh3333 on May 25, 2015 15:38:34 GMT -5
It all depends on how you tune the CVT. The stiffer spring is suppose to give you better takeoff and better hill climbing. That means faster for both. If you have too light of weights in, the clutch will not open like it should, causing high rpms but low speed. But if tuned correctly , you will def improve with takeoff speed and hill climb speed. What happens with a stock main spring when climbing a hill ? With a stock spring , the clutch pulley stays open longer on hills , this means you will slow down quicker . with a stiffer main spring, the clutch pulley will close sooner allowing the rpms to rise higher on the hill and stay at a higher speed longer. Pretty much the same with takeoff. At takeoff the stock spring will open sooner and cause a slower climb in speed. With a stiffer spring , its like winding out each gear a little longer to pick up speed quicker. But it has to be tuned right. With my setup rijt now , I have all stock springs and cannot get to 7500 with out using too light of weights. I am using 15 gram weights and I'm just reaching 7000 on a straight run . with any lower weights , I end up loosing mph on the top end because the belt is not climbing high enough with lower weights to match the speed I'm currently getting. So I just ordered a 1500 main spring " last week " . this will allow me to keep the 15 gram weights " maybe even go a little higher" . the 1500 main will keep my clutch pulley closed a little longer at top end , allowing the rpms to rise , so I can reach the 7500 rpms on a straight run and also I'll have the ability to still have the belt climb fully on the variator , giving me a higher top end then my recent 66mph and 7000rpms . I should be between 67-70 mph at 7500 rpms.
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Post by scooter on May 25, 2015 22:59:07 GMT -5
Softer spring means better performance uphills, am I right? or is it the other way around? A harder spring should close the clutch pulley harder, resulting in lower gearing much as if you had put lighter weights in the variator. A lighter spring should allow the bike to gear up faster. |
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Post by geh3333 on May 25, 2015 23:31:45 GMT -5
Softer spring means better performance uphills, am I right? or is it the other way around? A harder spring should close the clutch pulley harder, resulting in lower gearing much as if you had put lighter weights in the variator. A lighter spring should allow the bike to gear up faster. The only thing about litter weights, is that the belt may not climb as high, even with higher rpms. That's what happened to me. But scoot is right . the lihtrr weights will raise rpms just like a stiffer spring will. It's just finding the right combo so you can get the higher rpms with full belt climb. |
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Post by geh3333 on May 26, 2015 10:11:36 GMT -5
My new main spring will be here 2day !! Can't wait !! Wweeeen weeeeen wweeeeeen!! Actually , woooooon wwooooooon wwoooooon !! , lol. That's what my exhaust sounds like , lol
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Post by geh3333 on May 26, 2015 13:24:40 GMT -5
Here she is !!  |
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Post by geh3333 on May 26, 2015 15:47:54 GMT -5
I went on a short ride with my younger daughter , so I couldn't run the scoot hard , but it seems as if the CVT should be tuned correctly. I replaced the 15 gram rollers with 16 gram rollers . I believe she is ready for a speed run , I can't wait to see how she does !!
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Post by geh3333 on May 28, 2015 8:48:08 GMT -5
I went on a short ride with my younger daughter , so I couldn't run the scoot hard , but it seems as if the CVT should be tuned correctly. I replaced the 15 gram rollers with 16 gram rollers . I believe she is ready for a speed run , I can't wait to see how she does !! I took the scoot for a ride and im gonna have to let the 1500 main spring to break in for a week or so before I know if it gonna work with the 16gram weights. My rpms are nearing. 8000 and the clutch pulley is not opening fully " yet" |
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Post by steve on May 29, 2015 9:02:28 GMT -5
Keep us posted, GEH. Sounds like you are chasing perfection, like me. It's a never ending quest, isn't it?
In my technically challenged mind, the torque spring works the RPM much different than pulley weights. That stiffer spring seems to inhibit the belt from climbing up the pulley on the variator. It is always wanting to close, so you can't get enough tension to let the belt climb, IMO. I didn't think about letting the spring break in.
It just seems like it is constantly closing up every time I start to get momentum. I think I'll try a 1000 spring next. I wish they made them in 500 increments. I think a 500 spring would be perfect.
I think the 1500 would be optimal for a hilly area, like somebody posted. I bet they increase the torque of your rear wheel a ton, thus save wear on the engine. GEH, let me know what you come up with. Thanks.
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