Brake bleeding systems

[scott bockingMember]

KTM Bull wrote:

Quote:

singletrackmind wrote:

Quote:

Made a visit to Super Cheap today and will attack that bad boy on friday.

Thanks again.

Did you get the screw out if not wait till you get here we can have a go got plenty of tools and there will be Tech heads a plentyB)

Cheers Bull

I bought the Impact Driver but have not gotten a repalcement screw yet so I have left it. I will get one this week and have a good and failing that you can try some of your magic.

Thanks

[paulMember]

good to see you got it all sorted, as far as brake fluid goes, there’s only two manufacturers of glycol fluid in oz, BP and caltex i think, and a general rule of thumb is the higher the dot rating the higher the boiling point. with the trade off being the higher the hygroscopic effect as well. that is to say, the higher the dot rating the quicker it absorbs moisture. dot4 is an excellent fluid which is suitable for almost any road/trail application, serious competition may call for the higher 5.1 but if you use it, as has been said before flush it regularly, otherwise localised rust will set in in the system.
As for dot5 don’t be scared of it, just make sure it’s used in the right application with the correct changeover procedure (if applicable to your brakes). I have used the dow corning dot5 in my dukes for over 10 years with no problems because i educated myself on the do’s and don’ts beforehand. It doesn’t absorb moisture from the atmosphere but if moisture does get into the system it stays seperate from the fluid and will boil, turn to steam and cause a spongy lever. localised rust will also be a problem if the system isn’t flushed regularly for the same reasons as dot 5.1, it won’t mark paintwork though, and has a higher boiling point than dot 4.

paul.

[Bruce CurtisMember]

Reopening this thread as I’ve had the brake bleeding week from hades.

new Honda CRF M/Cylinder (thanks T/B ) installed (a known cure for YZ brake issues) line reversed to suit rear facing outlet, new lever, new carbon something orather ubeaut pads, and of a bleeding I went…..

Mmm this is working, lets unbolt the Caliper and clamp it to the rafters to bleed.. ok that’s better got some lever, let it sit so the air can get to the top and I’ll go do the dishes and put kids to bed…… 10 minutes later Crash bang, dog knocks bike off stand, fluid everywhere. No wuckers lets go again…not working this time what’s going on….at this stage it is 1.00am and I ran out of fluid.

Next day not getting any pressure to speak of, highly unamused, used another bottle.

Monday buys two syringes, and new bottle of fluid, tried reverse bleeding….Mmm half a spongy lever not good enough, lets go the other way and suck it through to the caliper… a bit better, so lets try again tomorrow evening. Gets home and realises on the first bleed I had adjusted the multi-adjustable lever to half throw…:blush: piston was only being pushed in 1/2 way… no bloody wonder.
wednesday evening, conventional bleed, fairly good, put zip tie on lever left over night = better, left another nght with zip tie= perfect.

some weeks i tells ya.

[TrentMember]

OUCH! Good to get that off the chest hey!

[Bruce CurtisMember]

Austblue wrote:

Quote:

OUCH! Good to get that off the chest hey!

Yep AustBlue, first the radiator then this, some weeks it doesn’t pay to go near anything mechanical or hydraulic.

UPside I bought the Missus and daughter a ripper 2006 Hyosung Quad in mint condition recoed 2 stroke motor yesterday from MDoohans old mentor for $600, see them in the city shops for 4x that for ’02 models.

Going riding sunday now for sure just to blow the blues away.

BC

[GregMember]

Be interested in our your new front brake goes bud, now you have a quality HONDA component on your bike

Honda helping make a better, safer, faster world

TB

[Bruce CurtisMember]

I’ll let you know this arvo T/B, after i get the bike back together and do a backyard/drive test regime’.

I don’t care what bits are on it as long as they work well, the sum of the parts and all that, and interesting fact is that Honda pays money to Nissin for R&D so in return they get the “A” gear well before the others, good business sense that.

BC

[Bruce CurtisMember]

Trailboss wrote:

Quote:

Be interested in our your new front brake goes bud, now you have a quality HONDA component on your bike

Honda helping make a better, safer, faster world

TB

Ok T/B now I have “feel” at the lever, probably 2x the stopping power at lower speeds, but still not enough for full on stoppies, can loft the rear about 6″ with full grip so now I’ll complement it with a CRF caliper when I find one, they slide straight onto the YZ hanger and my pads fit as well, again Ta T/B, is the best they’ve ever been so far.

BC

[GregMember]

Mr Blue wrote:

Quote:

Trailboss wrote:

Quote:

Be interested in our your new front brake goes bud, now you have a quality HONDA component on your bike

Honda helping make a better, safer, faster world

TB

Ok T/B now I have “feel” at the lever, probably 2x the stopping power at lower speeds, but still not enough for full on stoppies, can loft the rear about 6″ with full grip so now I’ll complement it with a CRF caliper when I find one, they slide straight onto the YZ hanger and my pads fit as well, again Ta T/B, is the best they’ve ever been so far.

BC

CRF caliper eh, will get back to you

TB

[Bruce CurtisMember]

You’re kidding!! T/B you should open a honda parts business:laugh:

bruce

[GregMember]

No I know I bloke that had one as he went to a wicked motard setup on his CRF and it should still be there, any other models or makes have the one you want as I know a couple of people in the industry :laugh:

TB

[Bruce CurtisMember]

basically any post ’02 CR/CRF caliper, the 250s and 450s shared the brakes, brake line would be a bonus…basically anything is a bonus to improve the brakes.

Bloody heck T/B, next time I won’t bother scouring ebay etc for months, I’ll just ask you first.

thanks Bud.

Bruce

[GregMember]

Watch this space Blue

[GregMember]

So how is the front brake Mr Blue?

TB

[Bruce CurtisMember]

Excellent “feel” T/B i can dail in exactly as much or as little stopping force as i wanted in todays sloppy clay to dry rocky conditions, I wouldn’t go as far as to say it’s brilliant yet, cause overall I still haven’t got the “clamping” force needed for big emergency stops (ask the scrub turkey and the wallaby I had to out manouvre today :ohmy: )
or for good stoppies on tar, I can get the rear 6′ and hovering, but it fades, this is the calipers issue i believe. But overall it is 200% on the stock yamaha system so far, at least i feel safe with it now and that’s the main thing. Honda have always had good brakes and forks (showa), and this shows in this M/cylinder.

Bruce

[Author]

Posts