Building Help --> ROLLER COASTER
General Building Tips
The Roller Coaster is a very precise model. In order to assure proper
function, we highly recommend that it be built on a smooth, flat surface.
Smooth carpet or solid floor is a better surface than plush carpeting.
If your car will not complete the track, run the car a few times to
isolate the trouble spot.
Go over that section with your instruction book to be sure that each
and every piece is in the proper position. If you complete your examination
of the section and the problem still exists, go over the adjoining sections.
Continue on with this section by section review until you have discovered
and corrected the problem.
Check that you can see the orange Connectors on the top of your car.
If you can't then the car is upside down.
Make sure the white Rod in the middle of the orange Connectors at the
front of the car is not pushed down too far or this will catch on the
track and stop the car.
In the very center of the car, there is a yellow and a white Connector
joined by a green Rod. If you have two green Rods, another joining the
two white Connectors below this, then the car is not flexible enough and
will fall off on every curve.
The tan Connectors on the inside of the front wheels on the blue Rods
make up the front axle of the car; they control the car's speed as
well as the sideways motion of the front wheels. If the tan Connectors
are pushed too close to the orange Connector attaching the two wheels,
the wheels will wobble and may derail.
If the tan Connectors are too close to the wheels, they may cause the
car to lose the momentum it needs to complete the course. We recommend
that you position the tan Connectors about a fingernail's distance
from each wheel (of course that's just an estimate). You'll
need to experiment to find the best position for your car.
Is your car falling off the incline as the Chain pulls it up?
Be sure that you've included the correct number of Chain Links
(122 for the Loop, 106 for the Spiral version). All chain links must be
attached in the same direction and be oriented with hook end facing down
car may fall off the track halfway up or it may not pick-up at all if
the Chain Links are not connected correctly. And be sure you didn't
put the chain on backwards.
What should you do if the chain pick-ups won't hook the car?
The Tubing MUST begin at the bottom of the Chain incline where the first
gold Connector meets the green Connector at the base of the incline. It
SHOULD NOT cover the green Connectors there.
Please review these sections carefully. Note the pattern of the gold
Rods on the inner loop (made of green Rods and gold Connectors) and the
outer loop (made of white Rods and yellow Connectors). This pattern is
critical to the performance of the car. The inner loop should include
gold Rods in EVERY OTHER gold Connector. The outer loop should include
gold Rods in EVERY TWO gold Connectors. If you have missed this pattern
in even ONE spot, your car may not complete the loop.
The four rectangular-shaped orange Connectors attached to the sides
of the Loop are very important. Make sure that three of them are attached
on both sides to gold Rods and in the correct spots and that the fourth
has a blue Rod attached.
Section 11 of Loop Version Instructions
The two vertical supports for the bridge are NOT symmetrical; they are
built differently and MUST BE different in order to work properly. Please
review this section carefully.
Need more help?
Browse the Help Center here on this web site, and if you don't find the information you need, send us your comment or question online, or call us at 1-800-KID-KNEX.