front sprocket removal

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front sprocket removal

Postby ac@39 » Sun Apr 26, 2015 11:00 am

notoriously difficult but not impossible as have done it before but now have an engine with no chain.... have tried to undo with it in gear but its not happening, i have an impact driver but havent tried using it as unsure if i may damage something internal .. anyone have any tips how i may accomplish this ??
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Re: front sprocket removal

Postby alextrx850 » Sun Apr 26, 2015 7:51 pm

Before removing the chain, leave the motor in neutral and then try the sprocket nut, the chain and the rear wheel on the ground will be enough.
Won't damage anything.
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Re: front sprocket removal

Postby ac@39 » Sun Apr 26, 2015 10:31 pm

No chain on bike, hence my issue
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Re: front sprocket removal

Postby Excalibre » Mon Apr 27, 2015 4:04 pm

I believe an air compressor and rattle gun would undo the nut, even in neutral with no chain. A short burst or two should do the trick.
I wouldn't use one of those impact drivers that you whack with a hammer though, you're likely to damage something.

Another idea would be to attach something like a leather belt or some seatbelt webbing to the frame/swingarm/wheel, then roll the other end around the sprocket a couple of times in the direction such that it tightens up on the sprocket as you undo the nut. Put some tension on the socket wrench then give the end of the wrench handle a sharp hit with a hammer (in the direction that undoes the nut). The 'shock' works a bit like a poor man's rattle gun to get things started.
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Re: front sprocket removal

Postby cobbadiggabuddyblooo » Mon Apr 27, 2015 10:43 pm

It has a std clockwise( right hand) thread so to remove the nut, unscrew in an anti clockwise direction just like 99.9% of the other threads on your TRX.
Torque it up as per spec and best to put a new tab washer on there if it has been used once before.
I've changed the front sprocket 4 times in the last year bouncing between 16 and 17 teeth and it cracks loose nice and easy. :wink:
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Re: front sprocket removal

Postby ac@39 » Tue Apr 28, 2015 6:59 am

when i have a moment will try something around the sprocket and tied off somewhere, it didnt want to know over the weekend , but will definately need a new tab washer
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Re: front sprocket removal

Postby gurunik » Sat Aug 27, 2022 2:57 am

Along same lines.... what is the nut size on the front sprocket? 30mm? Need to by a socket to fit, mine dont go that large.
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Re: front sprocket removal

Postby Rod.s » Sat Aug 27, 2022 8:05 am

gurunik wrote:Along same lines.... what is the nut size on the front sprocket? 30mm? Need to by a socket to fit, mine dont go that large.

32mm
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