Nipple Trouble
Hi guys,
I have never logged on to the forum before but after MrFlibble emailed me I felt it wise to come and look for myself to see the extent of the trouble he was having - I have to say at this point that a fitting service is always offered for any product we manufacture, some choose not to take it, maybe as ?120 is seen as a lot of money for six hours' work.......what is the general thought about this?
Anyhow, it appears on the face of it that he is struggling somewhat with what should normally be a fundamental procedure. in saying that though, it is true that ALL Nissin 3-piston (front) calipers ooze fluid once interfered with. Any of you who have re-bled your systems will know this to be true.
We have de-linked a good number of XXs, X11s, VFRs, STs and Varaderos, including a large number of brand new bikes and without question, every single one oozes fluid through capillary action along the nipple thread. What is completely bizarre though is the fact that Nissin 3-piston rear calipers do not ever leak along either nipple thread, but then, they are of a slightly different design.
It makes no odds whether you replace the nipples with new Honda, new zinc plated or stainless steel ones, they ALL do it. We have come to the conclusion that there is a miniscule mismatch in thread depth between the nipple and the caliper casting.
It is safe, although unsightly, to use PTFE tape but better to use a quality 'bearing fit' or threadlock. Fluid contamination is not an issue as whatever sealant you use does not penetrate the fluid path, as it is sited alond the thread of the nipple, well away from the interference-fit end (the pointy bit!).
If anyone has specific queries on any of the above, please come back to me or I will check here again when I next get the chance.
I hope this has helped at least one person out there!
(By the way, Blade calipers don't fit - unless you fit a Blade front end of course!)
Regards to all!