Tyres

As with all motorcycles, through most of the decades during which they have been produced, tyre fitment has always been a point to debate. This question is a long talking point with the Laverda. Whatever is ever said, most of it is subjective. Most makes of the correct size and speed, work on these machines.

Remember that the factory will not fit unsuitable tyres. Use their recommendations for size

but choose your own manufacturer.

The Twins work well with 3. 60 x 18 or 4.10 x 18 fronts, with 4.00 x 18 or 4.10 x 18 rears. The 4.00 x 18 rear gives an advantage over the 4.10 in that it is a slightly larger tyre, thereby providing a little extra height to the machine — ground clearance, on cornering, is a benefit. NEVER fit a larger tyre to the Twin. Use good quality tubes and inflate the tyres properly.

The Triple suffers more controversy. The factory have always fitted a 4.10 x 18 front tyre, sometimes with a 4.10 x 18 or 4.25 x 18 rear. In a nut shell, use the 4.10 for solo riding, or the 4.25 for two-up.

Everyone has their pet theory as to how to remove and then fit tyres so no long explanation will take place here. Here are the basic guide lines. Deflate the tyre fully by removing the valve. Remove the valve body locking nut. Now try to push the tyre bead away from the rim. It's hard, particularly on cast spoke wheels. Take care not to damage the rim, by placing a cushioned rag on the ground. A lot of patience may be needed.

Once the beads on both sides (or insides of the tyre are off the rim, place a motorcycle tyre lever under the bead close to the tyre valve, once the beads is into the well of the wheel on the 'opposite' side. Very carefully (particularly on cast spoke wheels) pull the bead over the rim. Too much force means something is not quite right. Try again. Work the tyre lever around until the bead is over the edge of the rim. Now pull out the inner tube. If punctured, throw it away. NEVER use a repaired tube. For this reason no method of tube repair is given. To remove the tyre, turn the wheel over and work the tyre lever on the other bead. Once part of the bead is over the rim, work the bead around the rim and remove the tyre. USE TYRE LEVERS WITH CARE — if the set-up is right, most men s hands should be able to do most of the work.

Tyre replacement works this way. Make sure that the object which punctured the tube, if this was the case, is removed. Make sure the rim tape on wire wheels, a rubber strip for Laverda, is complete and in the right place. (On wire wheels make sure no spoke ends are proud of the wheel well. File down if this is so). Wipe out the wheel rim. Hold the tyre upright, and then ram the wheel rim into the bead. Using your hands and liberal helpings of French chalk or talcum powder (not a liquid) work the bead around the rim. At the end, gently lever the bead over the rim.

Slightly inflate the inner tube until it just about has shape, place the valve into the rim and feed the tube around. Again use plenty of powder. Now set about pushing the other bead into the rim. Use your hands first and then fit the final part, closest to the valve. Make sure nothing is nipped, that the valve pushes right in and that any rotation arrows are in the right direction. Check also that any balance marks are in the specified place.

Inflate the tyre to way past its usable pressure, making sure the bead sits in the rim evenly all the way around and that the tube is not nipped. Replace the valve body lock nut but tighten it only finger tight. Deflate the tyre to its correct pressure and refit the valve dust cap. Check that all is now right.

0 0

Post a comment