YBR chain slack

[Doomsnite]

Finally thought to check the chain after washing it and found 8mm play. Adjusted everything the manual says but it didnt say which direction to adjust... Should the pin be screwing in towards the front of the bike or screw out towards the back?

I screwed out towards the back but then i could see the front of it wasnt pressing against anything. So if its meant to be this way, does the chain need replacing? I started screwing inwards the other way and it still wasnt affecting the tension. I then met resistance on one side and rounded off the nut thoughts?
____________________
Triumph Street Triple-R
Sold: Honda Hornet CB600F-Y / Yamaha YBR125

[SQL]

Don't do work on your bike?

[Pigeon]

Youtube has a bunch of vids on this.

But basically

- Slacken the rear brake
- Slacken the torsion bar bolt (no need to remove entirely)
- Slacken the axle bolt
- Slacken the locking nuts on the chain adjusting bolts
- Rotate rear wheel and find the a tightest point on the chain, check roughly in the middle of the chain.
- Press the chain down, start measuring, push the chain up and measure the difference between the two points (the deflection).
You want around 20-25mm of deflection.
- Turn the chain adjusting bolts clockwise to press against the frame resulting in a tighter chain, or anti-clockwise to loosen.
- Adjust by the same amount on both sides and check against the notches in the frame, that they are equal on both sides.
- As a final check, measure from the middle of the axle bolt to the middle of the swingarm bolt (should be equal on both sides).

- Tighten the chain adjustment locking nuts
- Tighten the axle bolt
- Tighten the torsion bar
- Adjust the rear brake to 25-30mm travel.

Apologies if I missed something.

[Doomsnite]

Yeah saw a youtube vid but didnt see the direction, thanks. Pressing against frame is tighter, ok good but was meeting a lot more resistance than on the vid. Does that mean one of the other nuts wasnt loose enough?

How can i resolve the rounding off. Will i need to get a new nut?
____________________
Triumph Street Triple-R
Sold: Honda Hornet CB600F-Y / Yamaha YBR125

[Pigeon]

[Doomsnite]

Ok thanks. It actually had a screw head on the end so will try that first.

How important is torque wrench on axle nut? Can you not just get it tight as fuck by hand?
____________________
Triumph Street Triple-R
Sold: Honda Hornet CB600F-Y / Yamaha YBR125

[zark]

8mm play before adjusting it??

What made you think it needs to be tighter?!!

[Doomsnite]

I mean 80mm
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Triumph Street Triple-R
Sold: Honda Hornet CB600F-Y / Yamaha YBR125

[Teflon-Mike]

[Doomsnite]

Thats 70mm up and 10mm down. Im going to give tightening it another go on weds (if i can manage it with the rounded adjustment bolt) now that i know which direction to go. Is there anything i can do to get it to turn easier. Should the axle bolt looser? Will check those CDB Too
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Triumph Street Triple-R
Sold: Honda Hornet CB600F-Y / Yamaha YBR125

[zark]

You want to be thinking about the whole deflection in the chain... How much up or down doesn't really matter... It'll naturally hang down due to the weight of it anyways...

Which nut have you rounded? The brake arm is a 13mm spanner... Needs to be open ended as there's a split pin on the end. (mine was solid and had to be cut off)
Then the axle needs a 17mm on the left side and a 19mm on the right... Ring spanners will help avoid them slipping off and smashing your knuckles into the floor... You'll see the frame 'expand' away from the wheel as you loosen the nut... Just enough to allow the wheel to move will do.

Hold a 10 mm spanner on the end of the adjuster, and use the 13mm on the locking nut. Wind the locking nut anti-clockwise a few turns, then wind the 10mm nut clockwise to push against the frame. This pushes the wheel backwards and tightens the chain.
Same amount both sides, the notches will help here. If you need to... slacken off the locknuts further as you wind in the adjuster.

Get the right tension and then hold the 10mm steady while you tighten the 13mm locknut again.

Give the wheel a spin, measure and tighten everything up. Adjust rear brake pedal if necessary... I'm getting close to the end of my adjustment notches so will be looking at new chain and sprockets soon... That's helpful about the cush drive there... Makes sense while the wheel's off.

[Doomsnite]

Its the adjuster on the left size thats rounded off. Theres a screw head in the end of it though so will try using that
____________________
Triumph Street Triple-R
Sold: Honda Hornet CB600F-Y / Yamaha YBR125

[Teflon-Mike]

[Doomsnite]

Thanks. Got some replacement stainless steel ones on ebay for £6. Will fit them on weds and see how i get on. As it stands it is on the 4th from last alignment notch. Will have to see how far that changes
____________________
Triumph Street Triple-R
Sold: Honda Hornet CB600F-Y / Yamaha YBR125

[Doomsnite]

Is torque wrench essential for axle?
____________________
Triumph Street Triple-R
Sold: Honda Hornet CB600F-Y / Yamaha YBR125

[_mjs_]

[Doomsnite]

FT?
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Triumph Street Triple-R
Sold: Honda Hornet CB600F-Y / Yamaha YBR125

[_mjs_]

[Doomsnite]

Thats some lazy arsed abbreviation.. I thought i was down with the kids! Ok nice one
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Triumph Street Triple-R
Sold: Honda Hornet CB600F-Y / Yamaha YBR125

[trevor saxe-coburg-gotha]

And when he says FT he doesn't mean FT for a landrover. He means FT for a jap bike. Big difference. Iow, it's easier to nip it up and crush a bearing than you might think.
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"Life is a sexually transmitted disease and the mortality rate is one hundred percent."

Mobylette Type 50 ---> Raleigh Grifter ---> Neval Minsk 125

[Teflon-Mike]

[ficedula]

[YBR Ric]

[Doomsnite]

And its only done 13k!
____________________
Triumph Street Triple-R
Sold: Honda Hornet CB600F-Y / Yamaha YBR125

[Pigeon]