• There has been a recent cluster of spammers accessing BARFer accounts and posting spam. To safeguard your account, please consider changing your password. It would be even better to take the additional step of enabling 2 Factor Authentication (2FA) on your BARF account. Read more here.

Remove stuck front sprocket?

Entoptic

Entoptic

Red Power!
Joined
Mar 13, 2007
Location
Buy GoPro Now!
Moto(s)
MV Agusta Brutale Dragster RR
Hello everyone - I'm replacing my chain and sprockets however I can't get the front sprocket off for the life of me. I've removed the nut and flatten/removed the washer.

I've got the bike in gear, put some bolt off on it and nothing so far. Tried tapping it with a dead blow hammer as well but that did not work.

There has to be a secret I'm missing. Would one of you please help me!
 
Last edited:
Entoptic said:
Hello everyone - I'm replacing my chain and sprockets however I can't get the front sprocket off for the life of me. I've removed the nut and flatten/removed the washer.

I've got the bike in gear, put some bolt off on it and nothing so far. Tried tapping it with a dead blow hammer as well but that did not work.

There has to be a secret I'm missing. Would one of you please help me!
Click to expand...

Year make and model?
And a good pic if you want help..
 
A three prong gear puller might do it. Probably a cheapo at Harbor Freight.
 
If its your basic sprocket and spindle then allow the engine to reach operating
temp before attempting removal because hot parts separate easier than cold parts...

Install the sprocket bolt back but leave a gap so when it breaks free it will not move much...

These tips put the odds in you favor...
 
Here is the culprit of a few busted knuckles.

Appreciate all the ideas from everyone :)
 

Attachments

  • IMG_8185.jpg
    IMG_8185.jpg
    95.1 KB · Views: 48
It may be partially stripped. Tap it back and align the grooves.
 
Heat it up with a heat gun or propane torch, spray the shaft with freeze spray. It'll fall off in your hand.
 
Can't see in the picture how the splines align, or mis-align. Have seen this problem with inexpensive replacement sprockets, sometimes the splines on the countershaft get damaged; sometimes the splines on the sprocket get damaged; sometimes both.

Will that heat and cold trick, above, work in this situation?
That would be great to not cause any further damage.
 
I would be careful with heat, don't want to melt the oil seal behind the sprocket.

Cheap gear puller should do it.
 
stuck sprocket

I had the same problem pushing the splined CV axle shaft backwards out of my 2008 Jeep Liberty's front wheel bearing-hub. Even with a 7-ton 3-jaw puller it only moved grudgingly, though it finally came free.

This was while replacing both front wheel bearings.

As a result - the CV shaft on that side got also replaced.

The CV shaft on the other side popped loose with minimal effort, and was reused.

One thing I will say - after disassembling the CV (half) shaft - it was built like a brick outhouse.
 
It looks like the splines of the sprocket have been damaged by the output shaft, causing binding.

A 3 jaw puller is going to be the best solution. Just make sure you use something to protect the end of the shaft. Should not take that much force to get the sprocket moving.

Once you get the sprocket off you can use a file to clean up any damaged splines on the shaft. New sprocket should slip on smoothly. Add a thin film of bearing grease to hopefully make the next sprocket removal
 
I would take an angle grinder to it. Cut as much of a groove into it as you can without touching any other part of the bike, then use a chisel in the groove to widen it a bit. Should loosen it right up.
 
I've seen instances where people put loctite on the splines to try to take up play, it could be why it seems glued on there. Hoping that's the case and there's no physical damage to the splines from a worn sprocket.

You can get a free three-jaw puller from your local auto parts store tool loan program probably.

I also be okay with a little focused propane heat around the outer diameter of the sprocket as you pull on it. By the time the output shaft would get hot enough to do any damage to a seal you would have melted any loctite long before and popped it off.
Have a wet rag handy to douse and cool the output shaft after the sprocket comes off if using heat.
 
Last edited:
Those little burs on the splines don't looks great. I hope thats material from the sprocket and not the shaft.
 
Looks like you got it off.
But next time try putting a 2x4 through the rim resting on the swing arm. Put it in gear and have friend/wife stepping on the rear brake. While you use a breaker bar on it 👍
 
Paulo666 said:
Looks like you got it off.
But next time try putting a 2x4 through the rim resting on the swing arm. Put it in gear and have friend/wife stepping on the rear brake. While you use a breaker bar on it 👍
Click to expand...
He wasn't asking how to get the nut off, apparently that part wasn't too hard. It's getting the sprocket off of there after removing the nut that seems to be the problem and there is nothing here to indicate that he has solved that particular problem yet.
 
bobl said:
A three prong gear puller might do it. Probably a cheapo at Harbor Freight.
Click to expand...

3 prong gear puller did the trick. Ordered off Amazon and it arrived the next day. Came off with ease and everything looks good. Put the new one on with a little grease to help it off the next time.

Thank you all for the info.
 

Attachments

  • 8D0B8C7B-4236-4DF6-9F4D-439118274853.jpg
    8D0B8C7B-4236-4DF6-9F4D-439118274853.jpg
    112.1 KB · Views: 7
Last edited:
You must log in or register to reply here.
Back
Top