Dr Pulley 20x12 14GR

[de dee]

   buggy parts nw.        good supplyer,.     20/12  14 gr.  dr. pulley sliders  x8 pieces   about 35. or 40 dollars

[agilebda]

Many thanks.

[Adept]

Hi

I got my pack from Dr. Pulley. I put in, I rode a few km yet.
My feelings are confused, I am not sure wether i am satisfied or not. This is a completly new bike...
I try to write down my impressions exactly, sorry for my english...


My impressions with the "old" bike:
The take-off was very sudden and strong (at 2000rpm), quick response for a little throttle pull.
After take-off there is a little torque fall down.
If I want acceleration, don't need to pull WOT, just a little pull. I like that.
Between 4000-5000rpm there is a "cruise mode" for the city.
Above that the machine goes crazy till 7000rpm.
If I release the throttle there is a strong slowing.

With the new rollers:
The take-off is smoother, not kick-like, and it start at 3500rpm.
The torque fall down is disappeared.
If I want power and acceleration, now I have to pull WOT, and need 6000-7000rpm.
The rpm move up and down easily, like the engine become lighter and restless. If I pull a little throttle, the rpm pointer move up, then come the acceleration.
The overall acceleration is better, I must say.
The rpm goes up +500rpm.
The fuel comsumption is a secret yet.
Now the overall feeling is somehow the bike is lighter, and smoother, not like a steamengine terminator.


So, I dont't know what to think... Maybe I just need a little time to used to it. One of my half like it, but the other half miss the previous massive, strong feeling.
I would mix the two bike...

What if I mix the factory rollers and the Dr. Pulley (4-4 pieces)??
Can somebody send me 4 15-16gr rollers? Would it be a change?

Talk to me...

Adept

[Vivo]

You can mix, and experiment... you cannot really get the best of both worlds.... Maybe the first thing to consider is your riding style and the purpose of your trips.... do you race, cruise, city riding, just go from point A to point B? Is top speed your concern?  For me, I would prefer the low end acceleration even though I will loose top end... I use my scoot daily city riding and I don't need top speed... Maximum of 55 mph is o.k. and I seldom even go 55... mostly 35-40... I need the quick acceleration at stop lights and overtaking cars...

[Adept]

You can mix, and experiment... you cannot really get the best of both worlds.... Maybe the first thing to consider is your riding style and the purpose of your trips.... do you race, cruise, city riding, just go from point A to point B? Is top speed your concern?  For me, I would prefer the low end acceleration even though I will loose top end... I use my scoot daily city riding and I don't need top speed... Maximum of 55 mph is o.k. and I seldom even go 55... mostly 35-40... I need the quick acceleration at stop lights and overtaking cars...

As I see, we are the same.
I like fast starts from stoplights, I like acceleration, I am a city/agglomeration rider, I don't care top speed at all (max 120km/h is enough), I like to cruise calmly.

So what is the good settings for me?

[de dee]

  if you have 14 gram sliders ,. you may want to try 15 gram sliders so it will not rev. up as much,.  2011 downtown

[robin.mary]

Hi Everybody,

I wanted to share my expérience as Dink Street 300i owner with some modifications.

First excuse my english as I'm French (From New Caledonia).

Then I installed for my DS 300i the Dr pulley 14g after testing the Malossi Multivar 2000 with 18g and 15g rollers (x6). I have also Malossi contra spring & Malossi clutch springs.

Regarding 14g sliding, they are very good, at least as good as Malossi Multivar with 18g rolling.
The différence with Malossi white contra spring is revs.

I can reach 8000 right after take off, with just a 1/2 second "pause" at 6500. So I get a very good acceleration off the line, improved vivacity and no belt slippage with this. The bad points are...revs also, as spring tend to close longer the rear pulley so you stay longer in low gear ratio and have some difficuties to get high speed. Also cruising revs are higher than yours, with 5500 at 37mph or 6000 at 50mph.

I think, with my tests, that I finally found the best combination for power off the line and WOT from 5K or 6K are quite impressive. Malossi is great too but I have to re test with 17g sliding from Dr Pulley as factory Malossi rolling are crap. It will correspond roughly to 13g sliding on stock variator, i.e very sporty ones.

At the end, I will anyway buy heavier sliding rollers from Dr Pulley to put in Malossi Multivar and get low revs at mid range speed as High reving engine tend to annoy me after some time !! Probably 21 or 22g (x6). And  go back to stock contra spring to give some relief to the belt.

Regards,

Robin

[Adept]

So I made my experiment.
I mix the factory rollers and the Dr.P.s
The result was horrible I got every bad attributes, and nothing good. I had the slower startup, but I got the lower rpm at the end (6500K), and the lower acceleration... So don't combine the factory and the tuning, because it is a bad mule

Meanwhile I got a scale, and the factory rolles are 15,4 gr in average. 8 rollers' weight between 15,38-15,42gr. I have 6000km in my scooter, and I can't see any wearing on the rollers, so I think this could be the real weight.

[Adept]

Dirk (the Dr. Pulley boss) said to me, maybe I put the rollers wrong in my scooter...

How high is your max rpm at WOT with 14gr.? My is above 7000rpm... Is it okay??
I have found a video where the RPM is above 7000, but in other videos the RMP stayed at 6500 (with Dr.P of course).

[Goodrich]

I went in for my 10K mile service and had them changed from 14GR to 13GR.  Not much noticeable change but they work.  I would put more miles on it but I just got a new mid-life crisis toy. It's a 2013 Nissan 370Z with a twin turbo and exhaust on the way.  500hp at the wheels will be a nice change from 28hp. 

[Adept]

Is here somebody useing 15gr Dr. Pulley?

[mrmike]

        I have a 2012 People GTI300. I just replaced the stock rollers with 14g Dr Pulley sliders. What's not to like? Better acceleration, less RPM at interstate speeds, and probably better mileage. I'm not sure about top end, but it still does 80+, and that's plenty fast for me.

[modmaster]

Adept, I have a set of brand new 15gr. sliders I can sell you for $25.00+ shipping if you would like them. I sold my GTi300 before I had a chance to install them.
modmaster

[Adept]

My secret wish came true... Gimme a few days please. I am a middle of a moving, so I don't have a proper adress yet...
So it is a 20x12 15gr brand new Dr. Pulley??

I am in Hungary (EU), so prepare..! Can you tell me how much will be the postage?

[modmaster]

We'll know better when you give me a mailing address to ship to. Those are the correct size 20x12 15gr.

modmaster