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Post by Dandy Dan on May 12, 2006 11:51:03 GMT -5
That's a really good idea ;D
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Post by chanito on May 12, 2006 18:31:32 GMT -5
Pair only works at slow speeds (bellow 4k) but yes it will throw your O2 sensor reading for a loop
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johntm
n00b Ruckster
modder
Posts: 9
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Post by johntm on May 17, 2006 6:58:49 GMT -5
OK, I'm done. whew!
What to do to your Ruckus for a small gain:
The best place to start is the mixture screw. Open it another 1/2 turn. That will richen it enough to get rid of the hesitation caused by running lean.
If you really want, you might notice a slight improvement by changing both needles to one size larger - your stock jets are a 38 for the low-speed jet and a 98 for the main. Go to a 40 and 100. If you change to a free flowing exhaust, you'll also want to open the air intake by about 1/4 inch. It's the half-closed nozzle under the nautilus shaped cover just above the drive belt housing. Just cut away a bit or the rubber flap that is occluding the port.
For the best performance throughout the power band, I installed a Supertrapp muffler with three disks installed, replaced the exhaust header pipe and ported the exhaust port on the head, fully opened the intake port, and changed the jets to 42 and 102. I also closed the mix screw down to 1 turn open. All this was verified with a K&N air/fuel mix meter. I am running a perfect 13:1 air/fuel mix. 14.7:1 is ideal for perfect combustion, but you want to run just a bit rich for the most power since no combustion system is perfect. Unfortunately the fuel mileage has suffered by about 15%.
Now for the qualatative part:
Would I do this to my scooter? NO.
- Why not? You did it?
Yep, I like to tinker. I restore old bikes and I play with new ones. I almost never leave things alone. It's just my nature.
I think to get any significant performance gains would require a different camshaft, and I haven't found one yet. Possibly a big-bore kit.
- So what do you recommend?
The best bang-for-the-buck is free. Remove three variator weights and open the mixture screw 1/2 turn. Than's all. Acceleration will improve markedly, the off-idle hesitation will be gone, and you haven't ruined your fuel mileage or your wallet.
But if you like to screw with 'em like I do, please do so! And please post your findings. We'd all love to hear if anyone gets real gains in performance!
PS: I didn't notice any difference in my final assesment with the pair valve closed off. Maybe I negated it's performance with the changes?
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Post by Dandy Dan on May 17, 2006 8:30:35 GMT -5
Thx for posting such gold ;D Hopefully some BR owners find it useful.
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