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Post by scooter3oy on May 4, 2009 8:39:48 GMT -5
i assumed i had 14g stock rollers in my GS-R, so i decided to try 12g DP sliders, reading that they were pretty close to the sweet spot for the GY6....my RPMs went sky high....they were hitting 8k+ at around 50mph....didn't want to push any more past that was curious so eventually weighed my original rollers...turns out they're 17g, not 14g....this explains the dramatic change when dropping down to 12g sliders i finally settled on a combo of 14g sliders and 17g rollers, avg. 15.5g....i find this weight gives me good acceleration, and much more usable throttle...with the lighter weights i had to always be at 3/4 to full throttle to get anywhere, even when just wanting to cruise along....and now with the RPMs not quite so high, i'm not screaming through the 'hood quite so loudly  |
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Post by dave04 on May 23, 2009 22:40:22 GMT -5
I have a Bashan 150 and ride in hilly southeastern Ohio. I weigh 180# and just put 12gm weights in and a Gates belt. Stock rollers were 14gm. My top speed is unaffected at 55-60mph on flat ground. Don't have a tach to see rpms but it doesn't feel like it's going to blow up. Going up steep hills down to 35mph but with the stock rollers would go down to 25mph. I might try putting the 14s back in and taking 2 out as I've heard others do, just to see what happens. My mileage is better with the lighter weights, I think.
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Post by thebestprices on Jun 10, 2009 22:33:20 GMT -5
good job guys i am taking in all this info. it should help me next week when i change mine. im looking to pull some wheelies i mean it will pull the front up but i need more t ride it out. 150cc gy6
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Post by jonathan150cc on Jun 15, 2009 11:05:44 GMT -5
14g slider weights = average top speed of around 58. Acceleration was average.
11g+14g slider weights = highest top speed of 62+. Acceleration was the same.
11g slider weights = very responsive mid range and fastest acceleration. Top speed 55 or so.
All of these come with an MRP variator and stock variator fan thing.
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Post by stevie37 on Jun 17, 2009 15:48:34 GMT -5
My Scoot Is A Strada RX200HP And I Am 210LB. I Put In 11g For The Stock 14g, Acceleration Is Great
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Post by imagesinthewind on Jun 24, 2009 22:52:57 GMT -5
Wish there was a formula for finding the perfect roller weight.
Scooter wieght + Rider weight x hill grade - HP / torque = roller weight.
A girl can dream.
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Post by xs650 on Jun 24, 2009 23:30:35 GMT -5
Wish there was a formula for finding the perfect roller weight. Scooter wieght + Rider weight x hill grade - HP / torque = roller weight. A girl can dream. The closest you can come to that is a number of RPM increase or decrease per gram of weight change. IIRC, it's 500 rpm + or - for each gram - or + of roller weight change. |
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Post by imagesinthewind on Jul 2, 2009 15:04:50 GMT -5
Went from 17s in the LaVie down to 14s and the difference at hill climbing was nominal at best. Tried 13s and it climbed better as well as had decent acceller and top end. Tried 12s and holy chit! I had a new scooter! Keeps good speed on the hills and feels like a 200# rock was lifted off the thing. Lighter and breezier, if you know what I mean, and is just a joy to ride!!!! 12s are my sweet spot, down from 17s.
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clbankes
Junior Dawg
Rocketa MC 75-150
Posts: 14
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Post by clbankes on Jul 17, 2009 18:42:45 GMT -5
I am so glad for SCOOTDAWG and all the great people I was planing to do some upgrades on my scoot while on vaca coming up besides the big hunny do list and this was one of them with no idea of what parts to look for or where to get them I just came to the only real source
THANKS TO ALL OF YOU
This from a guy that that blow his top when I seen this thing hiding in the garage
2000 mi and counting
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Post by homey246 on Aug 3, 2009 8:08:06 GMT -5
:oI done some CVT mods with my Roketa Sicily 150cc because when I bought it.... it did not go past 40 because the clutch pulley was shot... Mods... 1.) Koso Performance Variator @ buggypartsnw for $60.00 2.) 11.5 Gram MRP Roller weights @ buggy Parts $11.00 3.) GY6 Performance Racing Clutch @ Partsforscooter $50.00 4.) 2000RPM "Big" Tourqe spring and 2000RPM Clutch springs both red... @ parts for scooters both $26.00 5.) Stock belt ;D  $0 The total $147.00 my cruise speed up a sloped hill is 55 MPH .... Top speed in 65 MPH on a flat (takes a bit to get their ;D) and down a hill I hit 70MPH with the RPM's REVING..... my total weight is 156 pounds so thats good considering I am a fatty  Anybody wanna race the scooter busa?  |
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Post by scoottowork on Aug 6, 2009 10:40:57 GMT -5
I put Dr. Pulley variator and sliding weights that came with it on
my Tank 150 de. The scooter seems to have a little more power
and more top end to it. I recently took the cover off and looked
at the sliding weights. They had some minimal wear on them. I
have put about 3500-4000 miles on them.
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Post by simplydannygirl on Aug 21, 2009 11:49:23 GMT -5
Hi,
I tried a new Dr Pulley weights. It showed no improvement. And I did not like the sound of my engine. I did some routine maintaince in CVt Case. Cleaning, and greasing the Clutch. I put back the old stock rollers. Then I put a a new full GY6 gasket cover.
Man, it run faster then ever.  The engine sound like it got a boast.
Went on this Ride with some Motorcycles friends we hit speeds of 60-70. I kept up.
So what gives?
Danny  ;D 
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Post by flyangler on Aug 21, 2009 18:19:20 GMT -5
Welcome back Danny been wondering where you've been. Don't know about the DR.Pulleys usually they smooth out your acceleration. Got any videos of that ride? Dan.
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Post by anhoa on Sept 2, 2009 8:18:28 GMT -5
OEM 16.5 grams (measured at Post Office)
Max at 55 MHP flat when new.
Before mod: Max at 48MPH at about 6500 miles.
Tried NCY 12.5grams (labeled as 12gr) + new Gates belt.
Better pickup than the OEM but don't like the rev sound. 0-30MPH about 4 seconds. Max at 50MPH but takes time. Rev so fast that fried my Regulator/Rectifier. Tested ride for 50 miles. So I took out the 12.5gr and put in 15gr.
Tried NCY 15 grams (labeled as 14gr), measured at Post Office.
Ran much better. Not as quick as 12.5gr but I like the sound when I rev. Tested ride local (35MPH limit) for 2 miles on battery alone since the charging system has failed. I'm waiting for a new Regulator/Rectifier. I didn't test the top speed yet. I'll try after a new R/R.
Anhoa
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Post by maxximtl on Sept 13, 2009 20:30:41 GMT -5
Here are the particulars on my bike
Tracer 150
Rider: 245lbs
Mods: Aftermarket pipe, opened up airbox.
Location: Elevation 5200ft
So I've been working on tuning the CVT for a little while now. The Tracer 150 came with 14g weights stock which had me acceleration at 4500rpm and getting into top gear almost instantly. This was not good at all.
I next tried 12g weights which gave me another 1000rpm on acceleration, but I was still getting into high gear a little earlier than I wanted and the motor wasn't at optimal RPM. Today I installed 10g weights. This got me exactly 1000rpm more (now accelerating at 6500rpm.) This is right at torque peak (from what I was-able to find,) and the bike is definitely faster now. With the blue contra and clutch springs, I now cruise around at about 6k rpm. Its a little annoying since the engine is turning pretty fast, but its nice to have some power when you twist the throttle.
My only caveat is that because I am heavy and live at high altitude, this combo would probably be a bad idea for a lighter rider closer to sea level.
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Post by scootnsd on Oct 7, 2009 19:40:58 GMT -5
Finally changed my weights. Went with a mix of 12g & 10g. Found the best combo. Great take off, better mid range and no loss of top end.
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Post by erictheviking666 on Oct 17, 2009 21:03:57 GMT -5
Just installed some 6gram Dr Pulley sliders on my 50cc today. I can only describe it in one word "incredible"! That made the single most noticeable difference of any performance upgrade I've done. The initial takeoff is a little slower than the rollers. But, instead of taking off fast on the line then hitting a flat spot in the mid-range, it takes off a little slower at first but then starts pulling hard and keeps pulling. When I get up to 40mph it slides into that high range (almost like an overdrive) and the RPM's drop off slightly but I get an additional 3-4 more mph after hitting high range. Amazing!! I can't believe that I waited until I have almost 6,000 miles on my Scooter before I installed these. Anybody considering them, I would highly recommend as a quick seat of the pants upgrade thats quick and easy to do! |
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Post by als01seville on Oct 27, 2009 21:22:14 GMT -5
Ice Bear PST150H Trike, 353lbs+180 rider. Came with 10G Roller weights would top out at 8100 RPMs 49mph. The Variator was smaller than the Variator Fan which is 115mm. Installed a Prodigy Racing Variator & Fan both 115mm in size and put in 12G Roller weights. This got my RPMs down to 6800 RPMs and 53mph. I marked the Variator and still had 1/8 left on the Variator that the belt did not reach. Cut the BOSS down by 1/16 and picked up 1mph now its doing 54mph. Got 13G Sliders marked the Variator picked up 1/2 more mph and the mark is still visiable on the Variator but its almost to the top and the RPMS did not change from the 12G Rollers still WOT 6800 RPMs. So what the Sliders give you is very smooth acceleration all the way to WOT plus you can go 1 gram heavier on the Sliders without loosing RPMS from a Roller weight that is 1 Gram less. The reason for this is that the Sliders slide so evenly and smooth that it does not need as much force to throw out the weights. My Power Band is 7500 Rpms so I am putting in 12G Slider and get the Rpms to around 7200Rpms. High RPMs is never good for these engines if you want them to last.
Alleyoop
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dorby
Junior Dawg
Posts: 13
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Post by dorby on Oct 28, 2009 3:44:14 GMT -5
Im currently running a DRpulley variator 11 g sliders...gonna swap to 13.5 2k koso tq spring red 2k clutch springs 15/37 gear set topping out my ruckus speedo gauge...need gps =)  |
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Post by omgyouresexy on Nov 8, 2009 17:36:41 GMT -5
I've been reading about how these roller/slider weights work, but I'm still a little confused. I'm a big guy, 6'5'' 260 lbs. I assume my used scooter (new to me, had it a couple weeks - generic Chinese GY6 150cc) has your standard stock weights. I get the impression a lot of the weight change is to improve performance (acceleration and stuff), but I feel like my biggest concern is being able to ride my standard cruising speed at a lower RPM. I was reading a primer on the weights issue on another website and it made it sound like going to lower weights helps with acceleration but means you ride at the same speed with a higher RPM. Sorry for being so out of the loop, but are there any changes I could make to ease the load on the engine when cruising around. The scooter is already zippy as hell (compared to what I expected and am happy with), but I feel like I'm almost always riding close to the red line just to keep the speed I ride. (Maybe the best advice is just to slow down ) |
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Post by als01seville on Nov 12, 2009 1:42:46 GMT -5
Hi Omgyouresexy, Find out what gram weights you currently have in there since your happy with those and then switch Sliders of the same weight and should drop your rpms by about 300. If you want to get the rpms down a little more than 300 mix the sliders. Example if your currently running with 12gram rollers at 8000 rpms, then put in 12gram Sliders and it should drop you down to around 7700rpms. If you want to get a little lower then put in 3-12g SLiders and 3-13G Sliders for a total of each of 12.5 that should drop you down by 150 more rpms say arount 7550 or so and because the sliders will push the variator out further with less force(less Rpms) you should be at about the same speed, but your saving your engine and its not screaming.
Hope this helps
Alleyoop
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Post by anthonyvs on Nov 13, 2009 12:03:14 GMT -5
alleyoop did you ever figure out what torque spring your using?
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Post by anthonyvs on Nov 13, 2009 12:36:35 GMT -5
Omgyoursexy
I had the same problem with my scooter when I bought it. My end gears had about a 3.0 to 1 ratio. I changed to a gear set that gave me 2 to 1 ratio so it would run in the mid 7000 range at my top speed. But this was before they came out with overange variators or at least before i knew about them. Maybe the variator might be something to consider down the road to get your rpm's down. It will increase the life of your engine i'm sure.
Its great we are comparing variator weights to help people make a decision as to whats best to buy. The problem is we don't always know what torque spring people have or what gear ratio they have in the transmission. All key information in deciding the best weight to run. When I begin experimenting with weights I will be sure to provide this information. If somone has to use 17 gram weight to keep there rpms down I doubt there running a 750 rpm torque spring like is typical on a stock engine.
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dorby
Junior Dawg
Posts: 13
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Post by dorby on Dec 28, 2009 5:32:22 GMT -5
Im currently running a DRpulley variator 11 g sliders...gonna swap to 13.5 2k koso tq spring red 2k clutch springs 15/37 gear set topping out my ruckus speedo gauge...need gps =) finally got gps..57.2   |
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Post by speedracer12 on Jan 28, 2010 10:28:00 GMT -5
Here is my new set up:
NCY Teflon coated 115 mm Variator and matching fan cover.
11 gram Dr Pulley sliders.
Velocita Performance Clutch
1000 RPM Contra Spring
3 1000 RPM torque springs
Gates Powerlink 842-20-30 Belt.
12 gram Dr Pulley sliders on order as I plan to run the 12 gram and then mix the 11 and 12 gram to fine tune the scoot. Right now I pull 7300 RPM's and 52-53 MPH GPS verified.
I am very pleased with the NCY variator and Dr Pulley sliders and now I finally have a scooter which is smooth throughout all the power bands.
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Post by JR on Jan 30, 2010 11:16:15 GMT -5
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flytyer85
Big Dawg
65 and dangerous
Posts: 28
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Post by flytyer85 on Feb 28, 2010 19:28:13 GMT -5
Hi all, We just took our roller weights out to see what they are and they are 17g. Is that why we can only get 48 miles per hour? That was stock. What would you go to? We live in the hills of arkansas and we drop now to 34mph by the time we crest the hill. Not fun  I would really appreciate any help and suggestions that you may have. We were told 11gr but will that kill our top speed alot? Thanks guys. |
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Post by zugzug on Mar 1, 2010 22:58:19 GMT -5
I have read thru this thread several times and it seems like we could make some sort of chart. Everyone has different needs and expectations for thier scooter but we could probably figure out at what rpm range the weights cause the upshift in relation to the spring used. And maybe a serviceable range of wt for the spring. You know, when it is too light to get a full upshift to top gearing, or when its too heavy and upshifts so early that you cant get up to speed.
Are the color of the springs universal? Example:
750
blue 1000
red 1500
yellow 2000
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Post by speedracer12 on Mar 4, 2010 10:35:03 GMT -5
Here is my new set up: NCY Teflon coated 115 mm Variator and matching fan cover. 11 gram Dr Pulley sliders. Velocita Performance Clutch 1000 RPM Contra Spring 3 1000 RPM torque springs Gates Powerlink 842-20-30 Belt. 12 gram Dr Pulley sliders on order as I plan to run the 12 gram and then mix the 11 and 12 gram to fine tune the scoot. Right now I pull 7300 RPM's and 52-53 MPH GPS verified. I am very pleased with the NCY variator and Dr Pulley sliders and now I finally have a scooter which is smooth throughout all the power bands. Ok, 12 gram sliders arrived and tried them out and the result was better then using the 11 gram sliders. So I decided to try mixing them one 12 one 11 etc. Still the best results were the 12 gram. I should add on the new clutch the 3 pads are 2" long compared to the stock clutch which has (3) 1 1/2" pads. |
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Post by zugzug on Mar 14, 2010 20:02:40 GMT -5
I ordered a set of 12s the other day also. I tried the chain wrench to hold the variator (jrr idea) and a breaker bar to break the nut loose. Definately a no-go on my scoot. The chain wrench holds just fine but the bolts just not gonna budge for me. I didnt want to risk damage so I went ahead and ordered an electric impact wrench that comes with the sockets. Now I just have to fight the urge to buy more stuff while im waiting for it to arrive...
-Zug
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$0
Anybody wanna race the scooter busa?
The engine sound like it got a boast. 
