Took my 21 uf1k out the other day
Down a trail then on to a service rd after getting to 50kms I eased off the throttle as I have hundred of time to maintain that speed
Heard a growl like a bad bearing in a car it only happens on deceleration
Lifting the throttle just enuf to stop applying throttle it starts

Changed the primary clutch bearings 1 was bad
Drained all fluids rear differential had metal in it never has before I've changed it 10 times in 5000 kms
Took it for a short ride up down the rd less then a km this is what came out the rear diff (pic)
So rear diff shot ?

[2015 Z Force 800 53/Trail EPS]

It being cold up there now, what are you running for gear lube? Need to see if there is any "In&Out" movement on the pinion.

It being cold up there now, what are you running for gear lube? Need to see if there is any "In&Out" movement on the pinion.

75-90 synthetic
It stays in a heated shop when not in use
Haven't rode in temps under -10c yet this yr
I'll check on movement

Looks like the loud bang I heard was not a stick lol
Pinion bolt broke common issue I'm told
So to the dealer it gos lol

Heard back from dealer warranty
Is covering the new diff 😁

[2015 Z Force 800 53/Trail EPS]

Good.