Tightening the nut on front sprocket?

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I need to tighten it to 98nm (72ft-lb).
So what's the best way of locking it while i do it?

Jam the back brake on but that means a lot of stress on the chain?

The previous owner obviously wasn't sure either as the twat obviously just left it loose

Thanks
Dave

[MaybeGuy]

98nm is nothing compared to the strain even a bicycle chain can take.
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Blue_SV650S wrote: it was a sh1te wheelie, but it proves that he can get it up in 3rd and can do angles. In summery, mattsprattuk is a gobby little sh1tebag, dopehead tw4t, but sadly for all of us, he probably isn't THAT full of sh1te!!
Kickstart wrote: Hi I tend to agree with Matt. All the best Keith

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Cheers matt Just wanted to check

Will go do it now.

[stinkwheel]

I used to jam an M6 bolt between the chain and sprocket to "lock" it in position.
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“Rule one: Always stick around for one more drink. That's when things happen. That's when you find out everything you want to know.”
I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles.

[alun111]

Put it in gear?
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Summer: '00 Honda CB600F Hornet
Winter: '93 Suzuki GSF 400 Bandit VP Variable Valve
Past Bikes: Lifan LF100-5 Lifan LF125-A Honda C70

[Pete.]

Put a bar/piece of timber through the rear wheel to stop it against the swing-arm.
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a.k.a 'Geri'

132.9mph off and walked away. Gear is good, gear is good, gear is very very good

[supZ]

[Stelmer]

I got someone to sit on the bike, put it in first, pushed up against the wall and hold both brakes on.

That was on the ER. Not done the GSX one yet as there's loads of life left in the chain. Not looking forward to doing it either.

[alun111]

[cyberglass]

[Wafer_Thin_Ham]

Could just put a bit of wood through the rear wheel to stop it turning then tighten up.

As said 98Nm on a chain is nothing compared to the 100 odd bhp that it usually has to cope with.
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[Pete.]

Actually it is by my reckoning but still not enough to hurt the chain. Most times it will not hold on the brake though.

A 100hp bike will be making about 65NM of torque, but final drive at say 16/41 ratio has multiplied that so you're only making 25.3nM maximum at the front sprocket as an example. Putting a torque wrench on there and pulling it to 97nM is nearly four times more pull on the chain than the bike would normally make.
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a.k.a 'Geri'

132.9mph off and walked away. Gear is good, gear is good, gear is very very good

[Wafer_Thin_Ham]