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With our big filter, rejetting, CDI and tuned Polini varitor our Ruckus was now able to rock out at 50 mph on the flats with a big 200 plus pound rider! This was an awesome increase from the lame 37 mph stock top speed considering that the engine internals were untouched. Acceleration was much improved but still needed some help.
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| The blue Battlescooter C4U clutch springs increased stall speed and really helped acceleration from a dead stop with no bad side effects. This is a great bang for the buck mod. |
The first issue was our Ruckus was seriously slow from a dead stop causing cars to tailgate. We decided that the most cost effective solution was to raise the stall speed of the stock clutch so the bike would leave the line at a higher RPM close to the small engines fat part of the powerband. We installed Battlescooters C4U blue clutch spring. These springs are stiffer than stock and let the engine rev to around 6000 rpm giving it quite a bit more pull from a standing start. There were no bad effects from the springs and nothing bad was noticeable except better power from a dead stop no matter what people on forums might say!
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| The lightweight JCR flywheel on the right is machined down to reduce inertia, freeing up power to help accelerate the bike. |
Next we added a JCR lightweight flywheel. The JCR flywheel is a modified stock flywheel with a lot of weight removed from the periphery to reduce its rotational inertia. This helps the engine rev faster and frees up the engine's power to accelerate the bike instead of spool the heavier flywheel. The JCR flywheel made a feelable difference in acceleration with no negative side effects.
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| Dr. Pulley sliders were our final experiment on this segment of Project Ruckus. We found the 6 gram weight to work the best for us. |
Finally we switched out our variator roller weights for a set of 6 gram Dr Pulley sliders. Dr. Pulley sliders have a unique cammed wedge shape that allows the variator back plate to sit lower while still allowing the variator to expand fully. We measured that the Dr. Pulley sliders allowed the backplate to sit 0.020″ lower effectively giving our Ruckus a lower low gear. The Daytona belt now rode directly on the variator shaft in the low gear position! You can’t get a lower low gear than that! This helped our off the line acceleration and gave a little smoother action as well. Now we had decent acceleration and were able to finally use the Ruckus to commute to the palatial MotoIQ Corporate headquarters.
