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Re: [ST] Caliper piston cleaning



JES_VFR wrote:
> At 12:17 PM 6/12/2007, you wrote:
>   
>> The progressively spongier front brake is a common problem.  Easily cured by
>> taking off a caliper, insert a paint stir stick or similar between 
>> the pads to
>> keep the pistons from coming out fully, squeeze the lever to push 
>> out the pots,
>> then spray some brake cleaner around the pots at the caliper to 
>> clean.  An old
>> toothbrush can help in some areas.  Take care not to pollute the brake pad
>> surface...
>>
>> Spread the pads out a little, reinstall the caliper (mounting bolts 
>> get 40 Nm of
>> torque) and repeat for the other side.
>>
>> You should enjoy a few thousand miles of good lever feedback.  It's 
>> the buildup
>> of dirt that keeps the pots from moving properly in the seals.
>>
>> Hope it helps,
>>
>> --
>>
>>                                 ._O_.  '03 Sprint ST
>>             -Bil-              /_\o/_\ '98 Thunderbird Sport       /~\
>>     
>
> First off forgive me gang, as I have not gotten my sprint yet, I'm 
> still only riding my VFR. So some of these thought and questions 
> relate to how the Sprint 1050 compares to my Honda
>
> First, how often would you people recommend cleaning the pistons on 
> the Sprints? Should it be done at some mileage interval, tire change, 
> oil change, pad change? I ask this because on the honda I only clean 
> the pistons when I have the calipers off which so far is when I 
> change tires or brake pads. Also does the choice of pad material (ie. 
> one of the low-dust pads) make a difference in the interval?
>
> I never thought much about it before, but it does seem kind of 
> strange that motorcycle calipers do not use a second sealing ring to 
> clean the pistons like most vehicles do. Is there any particular 
> reason for that I wonder?
>
> last though, has anyone ever tried one of the new dry Teflon sprays 
> on the exposed portions of the pistons? I would think that since it 
> is dry and rejects the dirt that it would help keep the pistons 
> moving smoothly against the seals. The spray would have to be kept 
> away from the pad material, so it might only be something to consider 
> when the pads are out of the caliper, but it certainly would seem 
> something to consider.
>
>
>
>
>
> JohnS
> A Dragon Ascending
> "Forging my body in the Fires of my Will"
>
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>
>   
John,
I've had to do it twice...  so about every 6k miles for me.  The second 
time I also flushed and replaced the brake fluid as it was pretty dark 
looking.  I've got a small spray can of the dry teflon stuff, I think 
I'll try that next time I do it (which will most likely not be till winter).

Dan
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