Changing a front sprocket for dummies
Discussion
Bike on paddock stand, in neutral. Get a plank of wood. Stick it through your wheel / swing arm so the wheel can't turn. Loosen front sprocket bolt. Now slacken off your chain adjusters so the chain can come off the sprocket. Remove and replace sprocket. Chain back on, tension it up again. Still using the piece of wood, torque the front sprocket to manufacturers torque spec. Job jobbed!
Current chain should be fine if your only dropping 1 tooth, but the back wheel will be a little further forward than it was before, meaning a shorter wheelbase.
Current chain should be fine if your only dropping 1 tooth, but the back wheel will be a little further forward than it was before, meaning a shorter wheelbase.
sc0tt said:
Dern has very kindly sent me a -1 tooth front sprocket for my r1 because obviously it is lacking in the acceleration department.
How does one go about changing it?
Will it fit my Standard chain?
Yes it will fit. I also don't believe you need to break the chain to fit.How does one go about changing it?
Will it fit my Standard chain?
I'd stick it in gear with the chain taught, then use a breaker bar on the front sprocket bolt (it will be threadlocked) to get it moving.
Then loosen all slack for chain, remove spindle bolt if necessary to slide the wheel forward. Then you can remove the old sprocket and put a new one on.
You'll need threadlock to put it back on. You'll also need Lithium grease if you take out the spindle.
Then realign your rear wheel and reset the chainslack as usual.
Prof Prolapse said:
Is this actually a real thing?
It will be less of a difference than if you adjust your chain when it stretches slightly with age. I've never heard of people chucking new chains away because they've stretched and the wheelbase is now 10mm longer?
Yes it is. It will be less of a difference than if you adjust your chain when it stretches slightly with age. I've never heard of people chucking new chains away because they've stretched and the wheelbase is now 10mm longer?
TBF you probably wont even feel it.
Easiest way is before you loosen the rear wheel, take a 3/8ths extension bar and place it between the chain and front sprocket. Now with the socket needed to loosen the main nut, turn the sprocket anticlockwise so the bar is carried between the chain and sprocket. It will bind up the chain and sprocket so you can loosen the nut. Then undo the rear wheel and change the sprocket.
Tightening the front sprocket is the same procedure but put the bar on the bottom side and let it carry into the sprocket. Hey presto, easy peasy no assisstants needed.
Tightening the front sprocket is the same procedure but put the bar on the bottom side and let it carry into the sprocket. Hey presto, easy peasy no assisstants needed.
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