Author Topic: Variator rollers  (Read 209 times)

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Offline Shehzaad

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Variator rollers
« on: May 13, 2018, 02:36:14 PM »
Hey guys I have a question around what mileage should one replace their variator rollers? What would one experience if their rollers are damaged? Please excuse me if this question was asked before.
  • Nippi ballistic si
150cc Gomoto Nippi Ballistic Si
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Performance air filter
Modder carb
Oil change done ever 1000km
Current mileage over 10000km and stull running strong
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Offline Stanthescooterman

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Re: Variator rollers
« Reply #1 on: May 13, 2018, 08:02:38 PM »
Th\at is pretty much up to you.
Roller wear is not distance dependant, it's more about how you like to ride, like tyre and drive belt wear.
If you like to gooi, then they will wear out faster.
That is why there is this forgotten but helpful thing called preventative maintenance  :evil: so that you can get a feel for the rate of wear on parts on your scoot, and replace parts before they fail.
Badly worn rollers usually cause lazy throttle response.
« Last Edit: May 13, 2018, 08:42:27 PM by Stanthescooterman »
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Offline Shehzaad

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Re: Variator rollers
« Reply #2 on: May 13, 2018, 09:31:18 PM »
Thanks Stan for the information provided much appreciated I'm probably going to replace my rollers very soon.
  • Nippi ballistic si
150cc Gomoto Nippi Ballistic Si
Power flow performance exhaust
Performance air filter
Modder carb
Oil change done ever 1000km
Current mileage over 10000km and stull running strong
Long live my china scooter


Offline SA SCOOTERS

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Re: Variator rollers
« Reply #3 on: May 14, 2018, 01:44:11 PM »
Maybe this helps.
when we just started out with mods....we had this crazy idea one night that we can make the rollers lighter by reducing their circumference/diameter (like what happens when they wear, they get a tad smaller), instead of drilling the internal ID bigger or shaving off some weight on the sides of the rollers.

BAD idea. The slightest change in the circumference/diameter messes up the cvt. I realized that with a very slight wear on either the roller surface or wear inside the variator roller pockets, the whole cvt operation becomes sluggish. You need the diameter on the roller to achieve the required sliding distance of the variator on the variator shaft.

I also noticed many rollers with a few km's on them with quite substantial diameter wear. (Wear limit about 0.3mm) more than that and you need to replace the rollers. Also check for excessive roller pocket wear inside the variator.

At some stage the wear inside the variator (rollers pockets - where the rollers roll around in the variator) will also wear past the limit.

Conclusion. Very little wear can have a huge impact.

Same applies to the CVT belt. It wears narrower. More than 1mm wear and the whole cvt system wont operate as designed.
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Offline Shehzaad

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Re: Variator rollers
« Reply #4 on: May 14, 2018, 05:14:34 PM »
Thanks for the feedback.  See the reason why I asked is because my standard belt broke (shredded) at 15000km after I replaced it the bike felt so much more alive I was actually very shocked with the difference in power, however 1500km later if feels like it is old self again slightly less power.

So the only thing that was not touched before was the clutch which works 100% and the rollers. 
  • Nippi ballistic si
150cc Gomoto Nippi Ballistic Si
Power flow performance exhaust
Performance air filter
Modder carb
Oil change done ever 1000km
Current mileage over 10000km and stull running strong
Long live my china scooter

Offline sharkcontrol

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Re: Variator rollers
« Reply #5 on: May 15, 2018, 08:18:10 AM »
Usually the recommended rollers for the 150 cc scooters is 18x14.I am waiting for Dr.Pulley weights to arrive from overseas.Because of the polygon nature of the rollers the 12g weights are a nice option as it does not affect your bottom end or top end much.The standard 1og rollers are nice for take-off but affects top-end.Come on guys is there no local supplier for Dr.Pulley?I always have to import my own!
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