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  Topic Review (Newest First)
06-21-2017 04:34 PM
sangedegsx check for leaks everywhere from the master cylinder all the way down to the calipers. Make sure doesn't get on the paint if it is leaking since it'll destroy. If not you definitely have air in the system


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06-19-2017 04:08 PM
genman
Quote:
Originally Posted by Supercharger View Post
Quote:
Originally Posted by genman View Post
Yes I do and that side loading is entirely possible.
Planning to change the master anyway as I've never liked the cheap look of it.... just waiting to see which one suits best vs price.
Our bikes have some of the best front calipers money can buy. To complete the front brakes to true superbike spec I would buy a Brembo radial front M/C. Not cheap, the the best never is. I'd get the adjustable ratio model, so you can compensate for road conditions and pad compounds. Model 19 RCS, about $300 plus plan on about $50 for the reserviour kit.
Suzuki spec Nissin master cylinder have always been inferior to the versions used by Honda and Kawasaki.... my zzr1400 had brakes that make anything suzuki has ever offered feel like your squeezing a sponge.....which gives me an idea
06-19-2017 03:55 PM
Supercharger
Quote:
Originally Posted by genman View Post
Yes I do and that side loading is entirely possible.
Planning to change the master anyway as I've never liked the cheap look of it.... just waiting to see which one suits best vs price.
Our bikes have some of the best front calipers money can buy. To complete the front brakes to true superbike spec I would buy a Brembo radial front M/C. Not cheap, the the best never is. I'd get the adjustable ratio model, so you can compensate for road conditions and pad compounds. Model 19 RCS, about $300 plus plan on about $50 for the reserviour kit.
06-19-2017 03:29 AM
genman
Quote:
Originally Posted by Supercharger View Post
I wonder by chance if you guys having the issue have aftermarket levers? I have aftermarket levers and wonder if they could cause a leak by pushing the plunger rod with too much side load from poorly designed geometry.
Yes I do and that side loading is entirely possible.
Planning to change the master anyway as I've never liked the cheap look of it.... just waiting to see which one suits best vs price.
06-18-2017 10:42 PM
Supercharger I wonder by chance if you guys having the issue have aftermarket levers? I have aftermarket levers and wonder if they could cause a leak by pushing the plunger rod with too much side load from poorly designed geometry.
06-18-2017 04:14 PM
genman Whilst rebleeding mine today I think mine may have a seal in the master leaking under pressure...can't be totally sure as the reservoir was full and may have leaked out the cap as i unscrewed it.
Something to keep an eye on but even after an hour of careful bleeding the lever still has some spongy action....much less than before but i'd like better.
06-18-2017 03:37 PM
G-Dub I don't doubt you might have air in there somewhere (I bled mine about four times when it was new) but that would make a spongy lever. Seems to me for it to go to the bar means fluid is getting by the seal in the master cylinder. If it is still under warranty I would insist the dealer replace it. If not under warranty, you could replace, or maybe there's a rebuild kit. Maybe it hasn't happened while riding, but who knows if it will? Just my $.02.

Edit: Actually, after thinking about it, I don't think I would do a rebuild, but replace the whole thing. There could be a defect in the metal parts as opposed to the rubber parts.
06-18-2017 11:41 AM
TeamFreak I just got a new 2017 and am very much down on information on these things, but I noticed a bleed valve on the master cylinder. Been a while since I've had a Japanese motorcycle for the street that had one of them but if I had the problem, I'd give that a try at bleeding. However, you have the ABS model. I don't have experience with those and that factor might contribute to a problem.

Let us know how it goes.
06-18-2017 04:54 AM
genman my 2016 has been doing this randomly but i suspect its mostly due to some air trapped or created ( from boiling ) somewhere in the system as the lever comes back after a few hard uses....ABS pipework isn't easy to bleed and as mine isn't a major problem i'm leaving it for now..... if however i had a track day planned i'd take the time to sort it....my 2013 Hayabusa was the same so for me its the ABS plumbing etc holding air....took 3 or 4 bleeds to sort the Hayabusa ( even the dealer had a go ) and it never felt as solid as the 2012 non ABS model a mate had.
06-18-2017 03:52 AM
Supercharger It means something is leaking causing the loss of line pressure. Seal, hose or fitting is leaking. Doesn't take much of a leak to get the symptom you describe.
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