Hello and welcome to the episode, today I show you how to replace the fork seals on a Honda nc750x, this covers years 2013-2016, newer models are very similar but oil volumes may vary, so please check first.
First thing you should do is loosen the 17mm top caps as shown
dont unscrew them all the way, just loosen them half a turn
now with a 5mm allen key, remove the mud guard as shown
use a 8mm socket to remove the brake hose clamp, do the same on the opposite side
carefully lift mud guard off
using a 12mm socket remove the brake calliper, rotate the disc so it lines up with the cut out to help the calliper slide out, now tie the brake calliper out the way
remove the spindle pinch bolt with a 12mm socket,
place all your bolts in pot so you don't loose them
using 17MM hex socket, loosen the wheel spindle
using a block of wood and a trolley jack, ease the pressure from the front buy placing it under the sump, you wont need to put much pressure here providing your bike is on its main stand
remove the spindle bolt, remove both spaces and keep them safe
using a 14mm socket loosen the shock pinch bolt, now loosen the top pinch bolt
carefully slide the shock out
do the same on the opposite side
using a 6mm allen key on the bottom of the shock, jolt the bolt with a quick action, just loosen half a turn for now
while applying downward pressure remove the upper cap gently,
tip out the old oil and remove parts as shown, make sure you do this on a clean surface
now clean all the parts thoroughly
gently remove the dust seal with a flat screw driver, now remove the inner oil seal retainer
unscrew the lower allen key bolt completely
now separate the shock as shown,
remove the inner spacer
now remove the old seal
clean the bushes and use some auto sol on the shock tube, do not use anything abrasive
check the shock tube for any cracks or damage and clean,
insert the spacer shown
I use some waste pipe and an exhaust clamp to install my bush and seals, this works fine and will save you money on buying a special tool
slide the tool over and clamp it in place
now tap downwards jolting the bush in place, you will hear a change in sound when its seated
using a cut up milk carton smear it with grease , fold it round the end of the shock tube making a cone shape, now gentle slid the seal on, check seal orientation before installing, slide all the way to the bottom
now use the old seal and place that on top, we will use this to drive the new seal in place, using the home-made tool nock the seal in place as shown
again you will hear a change in sound when its seated
reinstall the seal retainer, be careful not to touch the rubber seal with the screw driver
now install the dust cover and push in place
insert the fork piston as shown
clean the old screw and tighten to 20nm, use the spring to stop the piston from turning inside
fill shock with 10w oil, leaving a 101mm air gap, I used 500ml in each shock and this was spot on
work the shock up and down to remove bubbles and recheck air gap, the air gap should be measured when the tube is fully extended, here are the illustrations
now slide the spring, spring seat and collar in as sown
now install the top cap pushing downward at the same time, tighten so its flush
install the shock, making sure the top cap is sticking out as shown
do the same for the other side, tighten the lower pinch bolts to 39NM
now tighten the top cap to 22NM
do the same for both sides
now tighten the upper pinch bolt to 22nm
grease the wheel spindle, install the wheel and the pinch bolt, tighten axle to 74nm, then tighten pinch bolt to 22nm
now carefully install the mud guard,
install the calliper and tighten bolts to 30NM
remove trolley jack and pump the front brake so settle the pads
check the suspension operates correctly and there are no leaks
now clean the brake disc and wipe all the areas where you have worked
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My gear:
GoPro Hero 8 with media mod
Purple Panda Mics
Video Editing - Vegas Pro 15
Samsung Galaxy S20
My Bike:
2020 Honda NC750X
Location, UK