Front sprocket removal help required - SV650.org

02-03-09, 11:09 PM

Right, firstly this isn't on an SV, hence the post in here. its a '97 ZX7R.

Now I've done a few sproket changes in my time and NEVER have I encountered one this tight. I have a 2 foot breaker bar on it with a hefty chunk of wood through the back wheel / swing arm to prevent the sproket turning. Already snapped one piece of 2" x 2" timber!

I've left it covered in WD40 for the night (as my back is now killing me). It won't budge at all. Should I try a longer breaker bar or would an impact driver be better? I am just worried about damaging the nut if I put too much force on it. Am i missing something, like do these nuts undo in the oposite direction to normal???

Come to my rescue the org.

02-03-09, 11:49 PM

You haven't got me and my gut sitting on it to hold it down

Sid Squid · 02-03-09, 11:57 PM

Assuming that you're doing it right, that is; turning the right way and have removed whatever locking device is fitted, then I'd stop struggling with it and take it to someone with the right equipment, by which I mean a compressor and and a rattle gun to buzz it off with.

Balky001 · 03-03-09, 01:36 AM

I got the front sprocket off once, only to find when I thought I'd put it back on it was not tight enough etc. I'd always take it to someone with a compressor as Sid mentions, you can never get it tight enough (oh er)

03-03-09, 12:28 PM

Quote:

Originally Posted by Balky001

I got the front sprocket off once, only to find when I thought I'd put it back on it was not tight enough etc. I'd always take it to someone with a compressor as Sid mentions, you can never get it tight enough (oh er)

I have a 200Nm torque wrench so not a problem (front sproket needs to be about 125Nm). It's easy enough with someone sat on the bike applying the rear brake, or by wedging the wheel with a wooden block.

Looks like I might have to ask around at work to see if anyone has access to a rattle gun. i was hoping it wouldn't come to that.

03-03-09, 12:37 PM

You could try PlusGas spray instead of WD as this really helps to un-seize stuff - maybe try tightening it a bit to crack it then it might undo...?

D

03-03-09, 01:28 PM

Best bet is an impact driver with the right size socket. I have a portable one but your a bit too far away mate sorry

02-03-09, 11:09 PM	#1
philbut Guest Posts: n/a	Front sprocket removal help required Right, firstly this isn't on an SV, hence the post in here. its a '97 ZX7R. Now I've done a few sproket changes in my time and NEVER have I encountered one this tight. I have a 2 foot breaker bar on it with a hefty chunk of wood through the back wheel / swing arm to prevent the sproket turning. Already snapped one piece of 2" x 2" timber! I've left it covered in WD40 for the night (as my back is now killing me). It won't budge at all. Should I try a longer breaker bar or would an impact driver be better? I am just worried about damaging the nut if I put too much force on it. Am i missing something, like do these nuts undo in the oposite direction to normal??? Come to my rescue the org.

02-03-09, 11:49 PM	#2
Warthog Guest Posts: n/a	Re: Front sproket removal help required You haven't got me and my gut sitting on it to hold it down

02-03-09, 11:57 PM	#3
Sid Squid No, I don't lend tools. Mega Poster Join Date: Jul 2003 Location: Skunk Works, Nth London Posts: 8,680	Re: Front sproket removal help required Assuming that you're doing it right, that is; turning the right way and have removed whatever locking device is fitted, then I'd stop struggling with it and take it to someone with the right equipment, by which I mean a compressor and and a rattle gun to buzz it off with. __________________ If an SV650 has a flat tyre in the forest and no-one is there to blow it up, how long will it be 'til someone posts that the reg/rec is duff and the world will end unless a CBR unit is fitted? A little bit of knowledge = a dangerous thing. "a deathless anthem of nuclear-strength romantic angst"

03-03-09, 01:36 AM	#4
Balky001 Member Mega Poster Join Date: Nov 2003 Location: Leigh - on - Sea, Essex. Posts: 1,491	Re: Front sproket removal help required I got the front sprocket off once, only to find when I thought I'd put it back on it was not tight enough etc. I'd always take it to someone with a compressor as Sid mentions, you can never get it tight enough (oh er) __________________ SV650SK3 - GSXR600K2 - GSXR750K6 - ZX636RC1H - HD Sportster 1200 - CBR600F 2012 - GSXR1000K7 - Triumph Bonneville T100 2019 - Aprilia Tuono 660

03-03-09, 12:37 PM	#6
daveb Guest Posts: n/a	Re: Front sproket removal help required You could try PlusGas spray instead of WD as this really helps to un-seize stuff - maybe try tightening it a bit to crack it then it might undo...? D

03-03-09, 01:28 PM	#7
vardypeeps Guest Posts: n/a	Re: Front sproket removal help required Best bet is an impact driver with the right size socket. I have a portable one but your a bit too far away mate sorry

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