Did you purchase this TRX500 new or used? Have the hubs, rims or tires been changed? Has axle been replaced?
Any damage to the axle splines or axle nut threads can cause this. Also, axle nuts are not one size fits all so it's possible, if you bought the bike used, it has the wrong nut. If you changed the axle the old castle nut might not be a good fit.
If you have it slightly cross threaded this can cause the nut to jump a thread and work its way off.
Also, check the inside seal on the hub and be sure it is seated correctly.
Read you bought it missing the nut , I would go with GRT's thought , when the nut was loose , it wallowed out the hub and most likely damaged the splines on the axle ----if you find that is the case there a couple of shade tree mechanic ways to extend it's life , one is to clean the splines of both the hub and axle and apply some CRC Minute Mend or JBWeld on the splines and tight it up and let it set or weld the hub to the axle ----if you need a new axle and hub anyways
Well I took all the advice and pulled the axle out to find the left axle spacer was missing. I suspect this led to the axle to be to far left and wore out the hubs. Axle splines do look to be in good shape.
I have a 99 trx 450. Replaced pulse sending unit and gear indicator sensor while I had it open. Getting pulse to cdi. No pulse out of cdi. New cdi installed. Still no fire. I don't know where to look next. Any ideas?
Getting .3 volts from pulse generator although ohms our correctly, replace pulse generator and stator, still have same voltage from pulse generator, check output to coil from CDI nothing, replace CDI.
Re-test,. Same readings everywhere still no spark
Testing blue/yellow wire from pulse...
Had some oil coming out of the driveshaft boot so i pulled the motor forward and turned it to get a look. There wasnt a seal there, unless its further in where i cant see it. The seal i bought doesnt fit, not sure which seal i need to get.
I have the Rocker Cover off so that I can replace the gasket that I blew.
One of the rocker arms looks really worn down, so I will be replacing it.
QUESTION: Is it okay to replace only one rocker arm and not the other?
Hello everyone. Brand new here and I have a problem. I have a 96 trx 90. Want to replace the carb. Should I go with an OEM carb or do you guys recommend a cheaper aftermarket one. The original carb is just giving me problems.
Thank you in advance