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The Helix and other large displacement tubular frame scooters require a special sub-frame mount. This kit is an extra cost item. Details of this sub-frame kit are shown below.
The clamp is constructed of 7 gauge steel. The block is 1 inch A36 cold rolled steel. The strut rod is 5/8 UNF all thread. Clamp bolts/nuts are 3/8 NC grade 8. On a Helix the block must be attached to the top of the clamp to provide adequate ground clearance. The strut rod threads are not painted as this would cause difficulties in installing and initial adjustment. It is suggested that when the sidecar is installed and aligned that these be painted to avoid rust. These can also be trimmed to length and a protective cap installed over the end.
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A small 1 1/4 inch long by about 1/2 inch deep notch is required in the plastic trim under the floor boards to clear the above clamp at the front. Note that this is not visible from the top of the scooter. The clamps and block are dip painted in gray Rustolium paint which is very close to the Helix chassis gray. The belly pan has been removed in this photo. it will also have to be notched to clear the clamps.
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This is how the main sidecar support tube with flange mounts to the sub-frame. Note that there are two sets of holes. One set is for the scooter model sidecars and the other is for the motorcycle model sidecars. The sub-frame and strut rods are over-length to make these as universal as possible for the large tubular frame scooters and to provide a mounting location if you want to mount a steering damper. These can be trimmed to length after installation, however I have operated my scooter with both the motorcycle Road Rocket and scooter Steel Raptor for several hundred miles over all kinds of roads with no problems. The strut from the seat support to the sub-frame allows easy 1 minute changes in the lean angle to compensate for changes in the sidecar loads. Just loosen a mounting bolt and add or remove a slotted washer and re-tighten.
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This view shows how the typical Cozy sidecar attaches to the sub-frame. Front of scooter / sidecar is to bottom of picture.
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