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View Full Version : Nocking noises in the rear end of 400ex


newjacksm
04-14-2003, 12:01 AM
Im thinkinking of buying some ones 400ex but he mentiond that theres a knocking noise in the rear end of the quad.. Could it be anything major, (money wise and labor wise)
toby400ex
04-14-2003, 06:27 AM
prolly axle bearings, lift the rear tires off the ground and see if the axle has any up and down play or side to side, if it does the bearings are shot. That will cost anywhere from $50-$150. Or it could be the chain:ermm:
gojk
04-14-2003, 10:14 AM
One of my hub nuts backs off every once in a while, it doesn't make much noise though. You can just feel it when you shake the quad side to side.
trx_rider
04-14-2003, 10:39 AM
It coukd also be the berring housing . M y friend 400ex was making a loud knockning noise in the rear and is berring carrier was completetly scrapp !!
R-Crazy
04-14-2003, 12:39 PM
on my R when i bought it, the bolt closest to the motor that holds the rear caliper was not snug and the whole assembly moved back and forth about 1/2 an inch. No big deal, i havent fixed it yet, but when i do the rebuild (when the shop is finished) it will be addressed.

dave
honda_250x_87
04-17-2003, 06:56 AM
Originally posted by toby400ex
prolly axle bearings, lift the rear tires off the ground and see if the axle has any up and down play or side to side, if it does the bearings are shot. That will cost anywhere from $50-$150. Or it could be the chain:ermm:

HOLY CRAP!! $50 - $150 FOR BEARINGS? i cant believe that! their only $28 for a bearing around here!
toby400ex
04-17-2003, 10:44 AM
Originally posted by honda_250x_87
HOLY CRAP!! $50 - $150 FOR BEARINGS? i cant believe that! their only $28 for a bearing around here!
$50-$150, as in if the whole carrier is shizzit:rolleyes:
StreetLegalEX
05-04-2003, 09:50 AM
Had the same problem, sound seemed to be coming from the rear braking caliper.
It's mounted so it moves along with the swingarm when you land from a jump, etc, but because my braking pads were new the sometimes got stuck against the braking-disc. (this dragged the entire braking caliper back and forth)
Actually it's nothing to worry about, after a while the new braking-pads will "adapt to the braking disc" and the noise will be gone.

That's where the noise came from in my quad anyways :D