Hi. I have a cbr 600rr 03
Recently i removed my right fairing and i've noticed that two of the Wellnuts was destroyed. Ive made a search on the internet and on the parts catalog, found that it's called "Wellnut' or "Well nut". I thought that was easy, but after this, problems starts....
I found on parts catalog that it uses 5mm wellnut. I thought nice, so i did a search in internet. First, i watch the side of my destroyed wellnut, it write on it "WELL NUT 90 C-550". I type on google "wellnut c550" and the first result was this http://www.bikersfinder.com/index.ph...db=18&pid=8574
It says M5X0.8. So it was called M5 huh? Nice. I searched on ebay for M5 wellnuts and i found some. But wait, what does it mean 0.8? Maybe 0.8cm? I was afraid.
With search on google, this page
says 4mm is M4, 5mm is M5 and 6mm M6. Sound cool and absolute logical. Hmmm so i thought the first page was wrong and M5 is 5mm. I did some research in the web, there is NO ONE SINGLE PAGE that says clearly "M5 is 5mm" or "M5 is this mm or that mm". Not even one.
Then i found a third page
Here, the fun starts. It says M5X0.8 i thought "ok, so M5 means that is 0.8cm, that's over, everything other i read was wrong". WRONG
Because it says that the C550 (that my bike had) belongs to the M5 family of wellnuts the 0.8cm ones! One other thing, no page writes 0.8CM, just 0.8 without explaining if it's the size of the nut in millimeters, centimeters or not. Anyway
I read the parts catalog again, i found that this wellnut is 5mm. What the f**k, i looked for it's screw, it says 5mm. I went to my bike with a digital caliper (with plenty of nerves, swearing, 3:00 AM the night while i wear pajamas and slippers), checked the screw and indeed it's 5mm.
So, im searching a 5mm wellnut, writing C550 on it, but it's not C550 cause http://www.thread-rite.com/pop_nuts/...t_standard.htm
says that C550 is M5 and all other pages does not clear what mm is M5 while http://www.desmoparts.com/products/p...tm/m5-wellnuts
claims that M5 is 5mm but here comes http://www.bikersfinder.com/index.ph...db=18&pid=8574
that says that M5 is 0.8 (don't know what they mean by saying 0.8) and it's NOT 0.8cm because the 600rr 03-04 parts catalog says that the screw and the wellnut is 5mm, not 8mm.
Anyway, i order from ebay wellnuts 0.5mm. I don't know how they call them (M5 or Z4 or WELLNUT-Turbo), nor i want to learn, i just know that they are 5mm. You may laugh or not with this, but please if someone knows for sure, it would be good and wise to tell us which pages are wrong and which are not. I found my wellnuts, if another guy searching for them, he will be very confused and in the end he will go to the honda dealer to buy for sure the right wellnut but for higher price.