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CB650R oil pan screws

DriesV

2019
CB650R ABS
Jul 9, 2019
Hi guys and gals,

Looking at this schematic, I see that the oil pan bolts for CB650 bikes (90010-MGZ-J00) are of type M6x28 NSHF (non serrated hex flange).
Does anyone of you know if these bolts have to be 28 mm in length? Or will DIN 6921 M6 x 30 fit as well?

Dries
 

Devilsfan

2018
CB650F
Jun 5, 2019
Tampa, Florida
I don't see why it wouldn't, so as long as it's going into the pan. But what's wrong with the original? Or why not get an OEM bolt? I'm sure your dealer has the exact size.
 

miweber929

2014
CBR650F
650 Alumnus
Staff
Feb 13, 2015
Woodbury, MN
Riding Since
1975
Nobody knows?
Not a lot of reason to drop the oil pan, I guess.

The way I see it is this: if 30mm would fit, Honda would spec it as that’s a “standard” bolt size. The fact it’s 28mm, a difference of 2mm, would make me nervous to change. YMMV.
 
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