Quote Originally Posted by the growler View Post
My venom hw80 vantage is 26mm. Not sure that it could be 25mm. Not taking it to bits to find out!.
Now, I could be very wrong here (I often am!), but I seem to remember that all the early references back in the 80s re the HW80 Lazaglide conversion pointed to them being 25mm? The "inspiration", if you like, coming from the HW77 which, back then, sported the 25mm bore.

You have me wondering now....again, like yourself, I won't be stripping mine to find out, preferring to keep the Venom / V-Mach provenance........Maybe I should check with Steve Pope.