can someone please advise By famousbyter (Read 342 times)

[famousbyter]

Hey guys, I got a ruckus clone 150cc w/ basic mods. exhaust, air filter, and up the jet a lil bit. I'm interested in increasing my acceleration and am aware that it may decrease top end speed if I go to low w/ the roller weights and clutch/torque springs. I am about 185 pounds. anyways, my question is this Can someone recommend a roller weight that would "get me in the ball park" of increasing my acceleration? Also which clutch and torque spring should I be looking at to accomplish my goal as well?

can you share how you got yours personally set up.

final question, is the drop off in top end really severe?
Thanks for all the wisdom

[Bashan]

Based on what I went through flailing around with my 150 CVT, I'd strongly recommend just doing one thing at a time. If you start changing everything at once you don't know what did what. So for what you want you have two choices, change the rollers/sliders, or change the main spring. The rollers/sliders is an easier change because you only have to pull the outer pulley and swap them. Usually stock is 13G on a 150 so start by going down to 12. You probably won't notice much loss of top end, maybe a couple MPH. You will be consistently in a "lower gear" across the RPMs as the inner pulley doesn't push out as aggressively with the lower weights. You will definitely have better hill climbing ability.

Contrast that mod with a main spring change out. The main spring is more problematic as you have to deal with compressing the spring to change it. I got sick of wrestling with this process each time I wanted to tweak it so I came up with this contraption. I've had the expected snickering about it but it does work, just be careful. The main spring has advantages over the roller/slider mod as you get to keep your top end. The stronger spring holds the entire CVT back from shifting as aggressively so you have better acceleration and hill climbing. However, the RPMs can still overcome the resistance of the spring at some point and push the two variator pulleys all the way together. This equals full top end albeit somewhat delayed along the RPM curve. Think about it, what keeps the inner pulley of the variator from moving out? There's no springs in the variator, it's the belt tension from the main spring that does it. So the main spring is probably a better choice, just more of a PITA. If you decide to go this route just bump up one strength at a time, I think that's the yellow from stock but you better check. Rich

[SABER]

I played with this issue all last year. I am now the proud owner of sliders from 8 grams to 15 grams. My stock was 17 gram rollers.
My end result was running 9 gram weights, 1500 rpm yellow main spring and swapping out my final gear set from 13/40 to 15/38.
Before top speed on GPS 52 mph at 6200 RPM
After Top Speed on GPS 62 mph at 7200 RPM max speed on a downhill I've reached 66mph
Acceleration increased as well because of the lighter weights and heavier torque spring top end increased because of the final gear swap. But remember one change effects all others. So just doing weights and springs as I did without final gear swap will put you past the red line.
Good Luck and start out buying cheap ebay sliders. When you find what you like then spend the cash on a good name brand.

[famousbyter]

Thats why I love this place.....ask and ye shall receive.....thats the kind of info i'm looking for and I sure do appreciate it......thanks for all those little pearls of wisdom Bashan, this is the second time your steering me the right way. Saber, thanks for sharimg and breaking it down as well..... I guess thats what I want to hear is other peoples experiences with this issue.
How did you build your bottom end w/ out losing to much on the top?
keep it coming guys....