Clutch Springs RPM and Variator weights symptoms? By terrigno (Read 5,514 times)

[jaxrhapsody]

Oct 3, 2015 10:21:12 GMT -6 Alleyoop said:

Heavier weights shift faster BUT you will loose rpms.
Lighter weights shift slower BUT you gain rpms.

Rollers for every gram up or down the rpms change by 500-600
Sliders for every gram up or down the rpms change by 200-350

That is why a TACH is very important to tune your motor and cvt for the best performance otherwise you are guessing on what you need and buying stuff you don't need or that makes things worse.

AND YES STRONGER SPRINGS are like a car with a clutch put the clutch in and get the rpms up and then pop the clutch and away you go and or like a stall torque converter on a drag car.

I've been trying to find the most precise info on cvt tuning. From what I can tell, the roller/slider wieghts are in the front variator, and the rear variator uses the contra spring, and when you change that, the wieghts should be changed as well for best results. So far; I really need to look up what all that is, in a gy6 150case, most of what I've read is from people tuning 50s, so I expect I could probably use either a red or blue contra spring, seems the blue doesn't effect top speed too much, and probably need between 7-9gr sliders.

[Alleyoop]

Let me ask WHAT ARE YOU LOOKING FOR out of your scooter?

My Trike in the picture below is a 150 Trike it has the 157QMJ motor which is bored out to 182cc's from 149.6ccs.
I run a 115mm Performance Variator with 12 Gram Dr. Pulley weights, The springs are OEM I do not like stronger springs and Here is why:
Stronger Springs like we have been talking about require HIGHER RPMS for anything to happen.
With stock my TRIKE which is heavy by the way 350 lbs plus my 180 starts to move at 2300-2500 rpms which is great.

7-9gram weights ARE FOR 50cc's, I will tell you the 150s run the best with 11-13 gram weights. The Red line ois 8000 rpms on these motors and thest motors make their max horsepower around 7500rpms.
But if you do not have a tach you realy do not know what the heck the motor is doing or if you can improve on something to make it better.

[terrigno]

Where's the cheapest place to get a tach? And the roller weights are better then slider weights? I put the sliders in my scooter now. But i have the same 5 gram Dr. Pulley weights on the side.

[Alleyoop]

This is the best tach for the price, the others found on ebay are not accurate. I personally have one of these so I am not smoking rope .
www.trailtech.net/digital-gauges/tto/surface-mount/tach-hour/742-a00
Here it is on my Trike.

[jerryscript]

Sliders are definitely better than rollers.

[terrigno]

Siders are better then rollers? Thanks for that tip. Alley thanks for the website. That's a little pricey for me at the moment for a tach lol. I have to see if I want to get into this as much for the moment.

Although I am noticing a grinding sensation in the drivetrain when riding at times. Not all the time. Its like a smooth grind that's not really hard. But it like goes in and out for a bit. Then sometimes it does it and sometimes it doesn't. It has to be coming from the drivetrain. Any ideas of what that might be?

[jaxrhapsody]

Oct 3, 2015 14:42:03 GMT -6 Alleyoop said:

Let me ask WHAT ARE YOU LOOKING FOR out of your scooter?

My Trike in the picture below is a 150 Trike it has the 157QMJ motor which is bored out to 182cc's from 149.6ccs.
I run a 115mm Performance Variator with 12 Gram Dr. Pulley weights, The springs are OEM I do not like stronger springs and Here is why:
Stronger Springs like we have been talking about require HIGHER RPMS for anything to happen.
With stock my TRIKE which is heavy by the way 350 lbs plus my 180 starts to move at 2300-2500 rpms which is great.

7-9gram weights ARE FOR 50cc's, I will tell you the 150s run the best with 11-13 gram weights. The Red line ois 8000 rpms on these motors and thest motors make their max horsepower around 7500rpms.
But if you do not have a tach you realy do not know what the heck the motor is doing or if you can improve on something to make it better.

Yeah, I'm not changing the stock springs. Just looking for a little more lowend, since I carry my fiance often. She weighs 180, and I weigh 220. I want the clutch to engage asap, so if I could find lighter springs- sweet. From there a set of sliders that work well with either a blue, or red contra spring, it's only real steep hills it struggles with, and I basically want it to perform with two people, as it does with just me.

I don't want to do any engine work, I think tye bike is powerful enough, I am going to be moding the intake, though. All I want now is suspension, and cvt tuning. I'm hoping to eventually find another drivetrain that has a disc brake(not trusting the performance brake drums with mire than 9hp) to do a complete build, thinking of efi, and possibly a 2step system, but I'm rambling. Slightly faster shifting with the sliders, and contraspring, better than stock clutch- faster engaging clutch, better shifting, little loss of rpms, then a gear ratio change to bump up top speed.

Mmmm 2step system, flame shooting scooter.

[Alleyoop]

From what you are saying, to get it the 150cc to where you want with the parts you would be better off IMO selling the 150 and getting a 250cc. Now a 250cc comes with all disc brakes and will pull you and yours with no problems up to 65+mph if needed stock and up and down hills.
It is also a little bigger so you both would have more room.
Just my 2 cents, EfI's are not cheap and are not plug and play.
Alleyoop

[jaxrhapsody]

Oct 6, 2015 12:15:03 GMT -6 Alleyoop said:

From what you are saying, to get it the 150cc to where you want with the parts you would be better off IMO selling the 150 and getting a 250cc. Now a 250cc comes with all disc brakes and will pull you and yours with no problems up to 65+mph if needed stock and up and down hills.
It is also a little bigger so you both would have more room.
Just my 2 cents, EfI's are not cheap and are not plug and play.
Alleyoop

nah...those things handle like crap, I like the 150 chassis. Eventually she'll get her own. I don't need more displacement. It's like before I sold my mustang, I was keeping the 2.3 in it. It actually moves pretty good, 0-35 alone is about 20sec, with her it's almost a full minute, suffer on hills greater than a 6% grade. In fact we outran a wrangler on a hilly road we frequent, that was wanting to race.

You're right on the efi, even megasquirt isn't plug n play.