FG Monster Truck Nitrous Oxide Part1 checkout Part2 as well
This is the first video, second video now available - FG Monster Truck Nitrous Oxide Testing Part 2
Allanach Racing's FG Monster Truck with Nitrous setup - testing phase. This is a custom
setup - not one of those kits. Allanach Racing will be developing his own
kit in the near future... stay tuned
Check out my other videos for more large scale action!
How Fast is a 50cc Scooter?
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How to derestrict a Yamaha C3 scooter, 2 of 5
Click on "More infos" for updates
Second part about the derestriction of a Yamaha C3 scooter.
Edit, July 17th 2008:
Final setup, which I am pretty satisfied with:
-6x3.5 grams Malossi roller weights
-Red Doppler clutch springs
-Restricting washer NOT removed
-Grinded variator lip to allow roller weights to move a little further.
Excellent acceleration, great hill climbing, top speed on flats, no wind:
45 mph, 72 km/h.
Stiffer clutch springs greatly improve startup acceleration (0-10mph). If
your C3 seem to take too long to "catch-up" it's acceleration from a full
stop, stiffer clutch springs is the solution.
For details about variator grinding, check the forum at c3rider.com
Edit, June 21st 2008:
Removing three roller weights to improve acceleration (like mentioned in
previous update) may not work well for everyone. Dividing by half the
shifting weights is rather extreme. You may need to fine-tune the total
amount of weight in the variator in order to get good results. I weight
210-215lbs, and a total weight of 18 grams in the var seem to be ok for me
(stock roller weights are six grams, btw).
Someone on the C3 forum said acceleration did improved after he took off
the three rollers, but he couldn't get over 40mph anymore. He was weighting
225 lbs. It seems that just ten pounds more can make a significant
difference, so if you are over 210lbs, the acceleration mod may not work
well for you. Someone else said he got better results using three 7grams
DO NOT EVEN TRY to just add one more weight (four instead of three). The
way this variator is made requires that EITHER six or three weights be
used, because any other number would cause the var to be off-balance
(remember, if you use three weights, there must be an empty weight slot
between every weight). Also, you may use two different set of three
weights in the var (ex: three 4grams and three 3grams) for as long as you
keep things balanced: when two sets are used, their position in the var
So, with the stock rollers, you only have two possibilities for total
weight: 18 or 36 grams. In order to fine-tune the var for optimal
acceleration without compromising top-speed, you may need to buy
aftermarket roller weights.
Once you have found the perfect total weight in the var, it could be a good
idea to fill all six slots if possible, because if only three weights are
used, they will wear twice faster
than six weights (wear signs on rollers can be seen as flat spots on the
outer circumference). For example: if, like me, you are satisfied with 18
grams total (3x6grams), then you should consider getting 6x3grams instead.
Finally, if your C3 is brand new, you should wait and complete the
recommended break-in process before you remove any weight in the var: with
less weight, the engine RPM are higher at low speed, thus, it would be
harder to be "easy" on the engine for the first 600 miles break-in period.
Edit, June 11th:
Double the acceleration for free!
Well, maybe not double, but enormously improved.
C3rider.com member Patrickhove suggested to remove three roller weights to
improve the acceleration, and I just did it. I always tought about changing
the transmission gearing by using lighter roller weights, but was too lazy
to actually buy them. I never dared to remove three roller weights because
it seemed far too much to me, I was sure there would be great loss in top
But Patrick convinced me to try it...
The results are surprising: If acceleration has not doubled, it certainly
feels like it has. The C3 can climb hills much more easily, even accelerate
in hills where it was losing speed before.
Top speed is the same. I left the restricting washer in, but I suppose it
would make more sense to remove it now.
There is one downside: If you often travel at low speed (30 km/h or 20 mph)
you will get a higher fuel consumption because the engine rpm is now quite
higher at low speed.
How to do it? Very simple: Follow the videos I made, and when you take off
the variator, just put three of the six roller weights back in. It is very
important that the three weights left in are evenly spaced, do not put them
on the same side of the variator!
It is quite ironic that the way for better acceleration has been within
reach for all this time, yet none of us tought about it.
Edit June 10th: It seems that a lot of people are using my video guides to
derestrict scooters other than the C3/Vox/Giggle.
Let me be clear: I am not a pro mechanic, this C3 is the only scooter I've
ever owned. I used a well known derestriction method on this C3, and I
learn by trial and errors, perhaps you should do the same. I don't know
nothing about other scooters, so if you have something else than a
C3/Vox/Giggle, then I can't help you, sorry.
If you have a 2 stroke, you should check this, though: