Posted by lwatters38@gmail.com on August 16, 2008, 2:38 pm
Can anyone tell me what is the best way to get rotor bolt out on a 81
CB750 I'm having a bit of trouble and wanted to ask someone before I
mess something up...?
Posted by Beav on August 16, 2008, 6:03 pm
> Can anyone tell me what is the best way to get rotor bolt out on a 81
> CB750 I'm having a bit of trouble and wanted to ask someone before I
> mess something up...?
Get yourself TWO Allen keys )of the same correct size) Heat one up until
it's a nice warm red colour and shove it into the head of the bolt. Leave it
for a few seconds then swap it for the other key and crank down to undo it.
Repeat as necessary. The heat is to break the bond formed by the thread
locking compound normally used to secure rotor bolts, but heating an Allen
key tends to soften it enough to ruin it.
--
Beav
VN 750
Zed 1000
OMF# 19
Posted by Outback Jon on August 16, 2008, 6:40 pm
Beav wrote:
>> Can anyone tell me what is the best way to get rotor bolt out on a 81
>> CB750 I'm having a bit of trouble and wanted to ask someone before I
>> mess something up...?
>
> Get yourself TWO Allen keys )of the same correct size) Heat one up until
> it's a nice warm red colour and shove it into the head of the bolt. Leave it
> for a few seconds then swap it for the other key and crank down to undo it.
>
> Repeat as necessary. The heat is to break the bond formed by the thread
> locking compound normally used to secure rotor bolts, but heating an Allen
> key tends to soften it enough to ruin it.
>
>
Bzzzt! Thanks for playing. You may have been right if he was referring
to the *brake* rotors...
The Clymer manual states to use a 17mm wrench, and a strap wrench on the
outside of the rotor to keep it from turning. Or, slightly simpler,
(also suggested in the Clymer manual) is to put the bike in gear and
hold the rear brake on while turning the bolt.
An impact wrench does a good job of loosening it, as well.
When I did mine, I did a combination of the above. Used a hand impact
wrench (the kind you hit the end with a hammer) for a couple of hits to
get it moved a bit, and then just a regular wrench while holding the
rear brake.
You *will* need a special puller to actually get the rotor off of the
end of the crankshaft. It's available from Dennis Kirk, or probably any
dealer with a parts catalog.
--
"Outback" Jon - KC2BNE
outback_jon@ver.no.sp.am.izon.net
AMD Opteron 165 (@2.5) and 6.1 GHz of other AMD power...
http://folding.stanford.edu - got folding? Team 53560
2006 ZG1000A Concours "Blueline" COG# 7385 CDA# 0157
Posted by Outback Jon on August 16, 2008, 6:44 pm
Outback Jon wrote:
> Beav wrote:
>>> Can anyone tell me what is the best way to get rotor bolt out on a 81
>>> CB750 I'm having a bit of trouble and wanted to ask someone before I
>>> mess something up...?
>>
>> Get yourself TWO Allen keys )of the same correct size) Heat one up
>> until it's a nice warm red colour and shove it into the head of the
>> bolt. Leave it for a few seconds then swap it for the other key and
>> crank down to undo it.
>>
>> Repeat as necessary. The heat is to break the bond formed by the
>> thread locking compound normally used to secure rotor bolts, but
>> heating an Allen key tends to soften it enough to ruin it.
>>
>>
>
> Bzzzt! Thanks for playing. You may have been right if he was referring
> to the *brake* rotors...
>
> The Clymer manual states to use a 17mm wrench, and a strap wrench on the
> outside of the rotor to keep it from turning. Or, slightly simpler,
> (also suggested in the Clymer manual) is to put the bike in gear and
> hold the rear brake on while turning the bolt.
>
> An impact wrench does a good job of loosening it, as well.
>
> When I did mine, I did a combination of the above. Used a hand impact
> wrench (the kind you hit the end with a hammer) for a couple of hits to
> get it moved a bit, and then just a regular wrench while holding the
> rear brake.
>
> You *will* need a special puller to actually get the rotor off of the
> end of the crankshaft. It's available from Dennis Kirk, or probably any
> dealer with a parts catalog.
>
Just wanted to add: Honda recommends a two piece puller, but the one I
used (and the one sold by Dennis Kirk) is a one piece. Again, I used
the hand impact wrench on it, but from what I've heard, an air impact
gun is far easier.
--
"Outback" Jon - KC2BNE
outback_jon@ver.no.sp.am.izon.net
AMD Opteron 165 (@2.5) and 6.1 GHz of other AMD power...
http://folding.stanford.edu - got folding? Team 53560
2006 ZG1000A Concours "Blueline" COG# 7385 CDA# 0157
Posted by The Older Gentleman on August 16, 2008, 6:52 pm
> You *will* need a special puller to actually get the rotor off of the
> end of the crankshaft. It's available from Dennis Kirk, or probably any
> dealer with a parts catalog.
Or (probably) use the rear wheel spindle.
--
BMW K1100LT Ducati 750SS Yamaha XT600E Honda CB400F
chateau dot murray at idnet dot com
"What you're proposing to do will involve a lot of time
and hassle for no tangible benefit."
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> CB750 I'm having a bit of trouble and wanted to ask someone before I
> mess something up...?