Dr Pulley 20x12 14GR

[wheels]

Replaced the rollers with sliders today (14 grams).  Did a quick run, only noticed
that the RPM's climb quicker.  I was hoping some of the hunting and Grr=Grr
variator/clutch negotiation would diminish.  Will do more riding testing next week.

Quick question.  After putting it back together, I noticed a clicking sound (bike on
center stand at idle).   Do you think one of the sliders slipped out of position ??

[TANWare]

no clicking here but if you increase RPM's does the clicking go away or vary with the engine speed?

[wheels]

Increase RPMs the clicking does change, with the increased noise I really can't tell anything.

While waiting for home repair guy, I removed and re-installed (very carefully) the sliders.
It makes the same clicking at idle, I think its 'normal'.  OBTW. when holding the pulley/variator
in my hands I just shook it and you can hear some sliders making a 'tink' sound.

P.S.  On the centerstand the max (instantaneous) RPM was over 9,000  .

thanks for the answer

[Cortez]

Increase RPMs the clicking does change, with the increased noise I really can't tell anything.

While waiting for home repair guy, I removed and re-installed (very carefully) the sliders.
It makes the same clicking at idle, I think its 'normal'.  OBTW. when holding the pulley/variator
in my hands I just shook it and you can hear some sliders making a 'tink' sound.

P.S.  On the centerstand the max (instantaneous) RPM was over 9,000  .

thanks for the answer

For what it's worth, the CVT on the Downtown (and People) is one of the noisiest
I've heard in a long time, especially when you give it some. Sometimes sounds like
an old scoot's CVT with worn out rollers (can of marbles) for a few moments after
you hit the throttle hard.

I wouldn't worry about it, I've tried 2 Downtowns and one People 300, all the same.
2 were new (under 1000km), one had over 6000km.

[wheels]

On another thread someone mentioned the cvt as being noisy.   I agree with this my only 'true' scooter comparison is an '05 Burgman 400.  I think there is far more noise from the clutch than the variator.  Perhaps the spring or whatever will 'wear' in and quiet down with more milage.

[Cortez]

On another thread someone mentioned the cvt as being noisy.   I agree with this my only 'true' scooter comparison is an '05 Burgman 400.  I think there is far more noise from the clutch than the variator.  Perhaps the spring or whatever will 'wear' in and quiet down with more milage.

I got about the same noise levels on a bike with 100-150km on the clock and the one with 6000
with worn out rollers.

[Cortez]

You've been deciding for two years now, is there estimated time for completion?

 

[Cortez]

Sooo, time to revive the thread!

Everyone happy with 14gr pulleys or someone went the 15gr route?
I need to decide quick!
 

[TANWare]

Answered in a PM. for my riding the 14gr is great. When on the freeway I kind of wish I had the 15gr but I mostly do local and the 14gr is much better suited. The few times I've done 2 up well over the rated GVW I am verry glad I have the 14's...............

[Cortez]

Answered in a PM. for my riding the 14gr is great. When on the freeway I kind of wish I had the 15gr but I mostly do local and the 14gr is much better suited. The few times I've done 2 up well over the rated GVW I am verry glad I have the 14's...............

Thanks for the PM 

We'll see how it'll go with the stock gearing and my 200lbs behind, but I'll probably get 14gr unless someone can
confirm that I'd get at least 6250-6300rpm at WOT with the 15gr sliders.

..but having the bike hit 6500 at WOT with 14gr sounds perfect..

[TANWare]

I am in the 220-240LBS range. The 14gr around town works wonders. you have to get used to the higher revs but so long as you drive the same, do not get into the extra acceleration, your MPG will stay the same. the 15gr sliders will yeild slightly better MPG as it should lower crusing RPM at highway speeds.

Also the 15gr would make for a better interstate cruiser as a 1 up machine. The 14gr actually lowers RPM at 65MPH+ by about 100 or so. the 15gr should lower it about 150 RPM or more and lock the RPMs slightly better under acceleration from there.

You have to remember too the stock rollers are 23x12 and servicable at 22.5mm. The initial 20mm profile of the sliders automatically alows for higher RPM at lower speeds. It is as the slider spin out to the outside of the variator the profile increases from the design lowering the RPM per MPH.

[Cortez]

You have to remember too the stock rollers are 23x12 and servicable at 22.5mm. The initial 20mm profile of the sliders automatically alows for higher RPM at lower speeds. It is as the slider spin out to the outside of the variator the profile increases from the design lowering the RPM per MPH.

That would mean that even with the stock weight (15.5gr) Dr Pulley sliders, we should be
looking at higher RPMs at speeds up to 50-55mph?

If the difference is only 100rpm between 14 and 15gr (which I'm trying to find out, but no one
seems to be using 15gr), I'll get the 15.. but I'm worried the difference might be a lot bigger,
and that I'll end up with the same 6000rpm WOT acceleration.

[TANWare]

with the 15gr you should be higher than 6,000 at least 6200-6300. Remember the optimal torque is 6,500. The 14gr is recomended as this is exactly where it puts you. In this manner you are running at the engines most efficient point. Higher weight puts you into lower revs and better gas milage. lower weight better acceleration and lowered gas mileage.

The problem with stock rollers at 14gr is the profile of hte variator doesn't lock in those lower RPM's at speed. The sliders by design increase the profile at revs, as an example at idle they act as 20x12 but at speed they shift position to look more like 27x12. The heavier the slider the sooner it looks like the 27x12 and the harder it locks into the extended profile. (measurement is just an example not meant to be exact.)

You also have to consider the twist grip. If you rev 8% higher and are heavy handed the MPG will reflect accordingly. If you become lighter on the throttle to maintain acceleration at the same rate as pre-sliders then the MPG is not hurt too much if at all. You have to just remember nothing is free. but it is nice on a roll on, as in passing or an on ramp, to have that extra umph...............

[Cortez]

True, I got the idea.. but I'd love to hear someone confirm the revs with 15gr pulleys before
I order..  thanks a lot.

[juanpauk]

Hi Cortez,

Something that you may want to check first is if your scooter comes with the new variator (the ramps are slightly shorter than the older model) alose the old variator is labeled as LEA7 and the new one as LGE5, which is exactly the same that they are using on the Peoples GT300i.

If it comes with the new variator I would go for the 15g, I had the 14g on mine (with the new variator) and it didn't feel right (too agresive) I kept them for 2 months and changed them to the 15g which make the bike a bit more relaxed when compared to the 14g.

It will be interesting to see your fuel consumption, most guys in the USA get well over 70 mpg, I can only hit the low 60s.