Megabyte
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posted August 26, 2002 02:28 PM
Front Sprocket Removal
Anybody know what size socket is required to remove the nut on the front sprocket? Also any suggestions on dos and don'ts for the front sprocket removal would be appreciated.
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ninjamissile
Expert Class
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posted August 26, 2002 03:27 PM
I believe it's a 27mm. It's a bitch to get off and dont even try it without a impact wrench.
Ninja Missile
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redelk
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posted August 26, 2002 03:43 PM
Parts manual lists it as a 20mm nut, but they are referring to the ID. I don't remember for sure, but I think it's 27mm.
There's only one sure and easy way to do it... air impact. Especially if this is the first time. If you don't have one, it's lookin' like "trailer time" to your nearest service station or anywhere that has BOTH air tools and a halfway competent mechanic that knows the difference between the directions to tighten and loosen nuts and bolts (or they'll let you use their air tools).
Not saying it can't be done by other methods, but it's wise to loosen the nut with the bike out of gear and that makes it pretty hard to do with a ratchet and having someone else step on your rear brake. It is NOT a bad idea to have someone sit on the bike(if it's not on race stands)and hold both brakes, because the bike will try to lurch forward.
If you do have an air impact and a rear stand, you oughta be set. Now, it's not like I'm an expert on such, but I have done a few the "wrong" way in my time.
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posted August 26, 2002 03:55 PM
a dewalt electric impact wrench will also do the job in a pinch.
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ZHooligan
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posted August 26, 2002 05:04 PM
Peen the retainer washer back out of the way of the nut, use a 1/2 impact electric or air and remove the nut. The thread is not reversed as I have seen some ask about. But if you don't have an impact either buy or borrow one.
I have changed the sprockets on 4 12's and with the impact it is a slam dunk.
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redelk
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posted August 26, 2002 05:10 PM
OOPS! Yep, everything else is kinda pointless until you bend back that washer!
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Megabyte
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posted August 27, 2002 07:40 AM
Thanks for the good info
Thanks for all the help, I'm still waiting for the 17t zx11D sprocket, but will let everyone know how it goes, and what I think of the performance gain from dropping down 1 in the front.
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TReMor
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posted August 27, 2002 09:47 AM
It's definitely a 27mm. I just did a 16t two weeks ago, and went through hell trying to find a 29mm...then realized I didn't even need it! Heh, sorry again Nano.
Just FYI, I did NOT use an impact. In fact, I had one and it didn't work too well. However, I'd never read the instructions about the washer. Doh! I just used a 1/2" torque wrench with a 2x4 through the wheel. Popped right off. dropped the sprocket on, retorqued to 95 ft/lbs, and was off to the races! 
Tim
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VincentHill
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posted August 27, 2002 10:42 AM
To Try to make it even easier, I think I used a 1-1/16" socket! I have a very old Sears and Roebuck (Roebuck was a Black man, so I try to mention him!  )Impact gun! Have it in gear and someone stand on the brakes!
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moodybluezx12r
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posted August 27, 2002 07:27 PM
just installed mines a week ago...27mm definetly.
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Megabyte
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posted August 29, 2002 07:21 PM
Done!
Picked up my 17t zx11d sprocket @ 5PM, and had the bike on the road @ 7PM. Not a dramatic difference, but I really like the way it rolls off the line, seems alot smoother. By the way, it does take a #27 socket and a heavy impact gun. Just for fun, I took a 3/4" breaker bar, slid a 4 ft. pipe over it, and all I could do was liftt the bike off the ground. After a couple tries, I put the impact gun on it, and it spun right off. I'd like to thank everyone for their good adivce!!
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jason370
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posted August 29, 2002 07:29 PM
i have a 17t and a 47t coming probablly tomorrow. where can i buy an impact wrench for 150 or under?
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Megabyte
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posted August 29, 2002 07:42 PM
Probably be cheaper to rent one. By my experience, you can't do the job w/o one.
quote:
i have a 17t and a 47t coming probablly tomorrow. where can i buy an impact wrench for 150 or under?
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Megabyte
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posted August 29, 2002 08:26 PM
speedometer
How does a 17t sprocket affect the difference between the speedo, and your actual speed?
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ZHooligan
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posted August 29, 2002 08:54 PM
You can by an Electric impact from a hardware store for under $75. Probably even less. Or a 1/2" air for less other than a snap on of course!
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ninja12
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posted August 30, 2002 10:07 AM
Guys check harbor freight. GREAT prices of the DIY type.
It's not snap-on, but for tools like impacts and 30mm sockets, that
you use 1 or 2 times a month they will last a lifetime.
Kinda like the Chevy of the tool world.
My kid will just have to buy their own tools.
They do have a electric impact ~$70, 250 ft/lbs if i remember correctly.
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redelk
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posted August 30, 2002 03:54 PM
Husky 1/2" 250 lb. adjustable air impact. On sale at Home Depot for about $49. Mine was a display model and got it for $39. As little as I use it, it was well worth it and has already paid for itself. Relly helped on the restoration of my '90 KDX when working on the clutch and flywheel.
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TReMor
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posted August 30, 2002 04:51 PM
I bought a Porter Cable pancake compressor on closeout at Costco for $190, and bought my impact driver and air ratchet at Home Depot for around $70 for both (I think.) I can't remember the brand offhand, and I'm sure they're not quite as good as the Husky stuff, but for as little as I use the stuff it was well worth the investment. The air ratchet alone paid for the entire system when I installed my Hindle. I just wish I'd had one before when I was doing all the crap to my Mustang by hand all the time. 
Tim
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sleezyrider
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posted August 30, 2002 06:45 PM
Are You Sure About That???
quote:
To Try to make it even easier, I think I used a 1-1/16" socket! I have a very old Sears and Roebuck (Roebuck was a Black man, so I try to mention him! )Impact gun! Have it in gear and someone stand on the brakes!
Vincent Hill... your comment about having the bike in gear goes against every other comment I have ever seen concerning removing the front sprocket...
I have heard stories about stripped gears and bikes moving forward and falling to the ground doing a considerable amount of damage when the Bike was in Gear.. Now, if you were to use a rear stand needless to say the bike would not travel forward, but the transmission damage is still a posibility using an impact wrench...
Are you sure you meant to say "Have it in gear" ??
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ZHooligan
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posted August 30, 2002 07:48 PM
There are a lot of stories and no no's I have heard along the years about things such as not having it gear etc. I have done it both ways and never had a problem. I have also had people stand in utter amazement and disgust when I throw a t-handle or ratchet between my chain and sprocket so I can torque my axle. Never a problem one as a result.
I am of the opinion that this falls into the is it a 1000% or 800% safe if you know what I mean.
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future; -- Youth is forever.
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redelk
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posted August 30, 2002 09:08 PM
Though no one would be surprised if I said that I had always done the nut removal while the bike was in gear and having someone stomp on the brake as well(because the Elk is so damn ignorant!). It wasn't until I recently mentioned it did I hear about the "damage thing". I plead ignorance and I've been blessed with luck. Now Z and VH have given me a tad bit of peace of mind that I haven't been commiting the "greatest of sins" all these years!
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There are only three sports: bullfighting, motor racing, and mountaineering; all the rest are merely games.
-Ernest Hemingway
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ZHooligan
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posted August 30, 2002 09:46 PM
Let me guess, no one here has ever used a screw drive or a punch and hammer to adjust the rear shock preload collar! Only the factory spanner wrench.......
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future; -- Youth is forever.
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redelk
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posted August 31, 2002 08:15 AM
STOP IT! Next thing you know, you'll talking about head bearing nut "tools".
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There are only three sports: bullfighting, motor racing, and mountaineering; all the rest are merely games.
-Ernest Hemingway
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ZHooligan
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posted August 31, 2002 09:22 AM
A similar tool as used on the shock collar?
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To those who do not count their life in years, but in how life
has touched them in the past and how much it can hold in the
future; -- Youth is forever.
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