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My bike currently has a 3mb cylinder with 3bn head.. im told the 3bn head is restrictive?? Will i see a gain from fitting a 3mb head? Thanks
Yes, although 3MB heads are getting hard to come by now, so having the 3BN derestricted would be the cheaper option.
@Calum thanks for the reply callum. I have a good source of parts so can get the head no problem
