I have bought a set of COP on ebay now just opened the package and see that there are 2 diff types of partnrs both Denso in the set.
129700-3881 j0388
129700-3990 j0399
The first one is much shorter but can made fit....

I was just wondering if the specs on these are the same for both. Searched without results.

Please let me know if you have an idea...

 

the ones you are to use are the 388's the shorter ones are from a 600rr, you want the 600 f4i coil sticks.

the coil sticks that work the best with the b series are from:

cbr 600f4i
cbr 929
cbr 954

should all be the same part. dont quote me but this is what ive been using. they have a smaller plastic section in the middle about 1 inch long that the smaller ones do not.

 

Tnx for the reply.
I made the short one fit by removing the valvecover's cast ring at the plug entrance....fits ok now.

Was wondering if using the different types will make a diff.

Could not find the specs from the COP on the internet :-(

 

i would try to use 4 longs ones if possible.