firefly
Well-Known Member
Take your bike for a ride through a series of potholes and bumps at straights, a curve with a bump or a pothole in your path and feel how the front reacts, if it feels rubbery with a side ward jolt this is a loose steering nut all that is needed is to re torque it, regular checking and torquing will keep the front end nice and firm. Dealer said it should last 50K before you need to change it provided you re check it ~ 6 month of daily riding.
Most front wobble come from that provided that the tire air pressure is correct and tire is in a good shape.
Another thing that causes front end wobble is a shorter rear tire and a stock size front tire without lowering, or anything that shifts the weight of the bike to the rear including shorter shocks and heavy rider weight, the bike feels like the front end will lift up even at steady high speed.
a balance forward weight bias makes the front end solid as a rock with no hint of a wobble at any speed.
the photo shows the COG a smaller tire in the rear shifts the COG backward ( causing more wt on the rear and less wt on the front.
A smaller front wheel will do the opposite, it will shift the wt BIAS forward, if too much the bike will dive like crazy , the stock max needs a LITTLE forward wt bias to handle properly and stiffer fork springs.
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Aprilia TXR312M
Most front wobble come from that provided that the tire air pressure is correct and tire is in a good shape.
Another thing that causes front end wobble is a shorter rear tire and a stock size front tire without lowering, or anything that shifts the weight of the bike to the rear including shorter shocks and heavy rider weight, the bike feels like the front end will lift up even at steady high speed.
a balance forward weight bias makes the front end solid as a rock with no hint of a wobble at any speed.
the photo shows the COG a smaller tire in the rear shifts the COG backward ( causing more wt on the rear and less wt on the front.
A smaller front wheel will do the opposite, it will shift the wt BIAS forward, if too much the bike will dive like crazy , the stock max needs a LITTLE forward wt bias to handle properly and stiffer fork springs.
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Aprilia TXR312M
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