Sprint GT Fork Oil Dilema

So what started out as a simple swap of the front brake pads and a new tyre has resulted in a fork oil change also. Whichever garage changed the front wheel last time has managed to cross thread one of the pinch bolts on the bottom of the fork so when i went to pull the wheel the pinch bolt snapped, didn’t matter how careful i was i could just tell from the start that this would be the outcome.

Anyway one fork is at an engineers to get the snapped bolt out, think it will likely result in a lock nut and bolt but they will see what they can do.

So thought since i have one fork leg off i may as well replace the oil. Its seemingly supposed to be done every 12K some suggest 6K well this bike with 20K doesnt look to have been done in the past. My dilemma is that specifications state to refil with 486ml of new 10 weight oil. I have been pumping and draining for hours and there is only just shy of 445ml thats come out, so do i fill with amount that drains or do i put in 486ml whats the thoughts??

Cheers
Mark

 

Thanks for all the thoughts much appreciated.

I simply have the forks upside down with the spring out and pumping every now and again. I’m not intending changing the seals everything seems fine no leaks, just thought since im in for one being off makes good sense to change the oil. I’m happy with the ride as it was so will stick with the 10W.

I can easy check the height of the oil when i take the other one off when i get it back.

Cheers

 

Good to know cheers for that.

Hopefully they can sort it out, i dont mind it being a lock nut to be honest as long as both sides are pinched as opposed to only the one.

Will see how i get on with the oil level on the other one

 

Is there a standard height that it should be and how it would be measured?

Thanks

 

I have seen here http://www.motorbikespecs.net/index.dyn/Aaron%20Lancaster/contact.dyn?flag=2&model_id=5834456&make=Triumph that the air gap is 120mm for the normal ST 1050 with a 460ml amount of oil. So still trying to determine what it will be for the GT since its spec is 486ml of oil.

 

Thanks for that, so 105mm with spring out and compressed?

Ta

 

Found this useful page:

https://ascycles.com/pdf/TriumphSer...a Sheet - Sprint 1050ST and Sprint 1050GT.pdf

So 105mm compressed

 

Didn’t bother with getting the pinch bolt drilled out i bought and replaced the lower leg cheers Sprinter. So all put back together new oil and seals was really helpful reading and watching these:

http://www.triumphrat.net/maintenan...l-seals-bushings-springs-and-gold-valves.html



And getting torque values here: http://www.triumphrat.net/attachmen...n-chart-triumph-sprint-st-torque-settings.pdf

Couldnt believe the state of the fork oil it was well past needing replaced, lots of info on the web suggesting 6K change as opposed to 12K