• Welcome to the forum website of the Vincent H.R.D. Owners Club.

    Should you have any questions relating to the Vincent H.R.D. Owners Club, or Vincent H.R.D. motorcycles in general, please contact Graham Smith, Online Forum Webmaster by calling 07977 001 025 or please CLICK HERE.

    You are unrecognised, and therefore, only have VERY restricted access to the many features of this forum website.

    If you have previously registered to use this forum website, you should log in now. CLICK HERE.

    If you have never registered to use this forum website before, please CLICK HERE.

Exhaust Bending


Well Known and Active Forum Website User
VOC Member
Actually a pair of 1 1/4" pipes tuned to the right length might work out very well on a Vin...... but you don't know until you try.... and a have not.

I have not tried the 1-1/4" diameter pipe, but the math indicates that it is too small unless your redline in 3500 or so. The short 2" pipe works really well at high RPM if it is shortened (I use 28".) The math for a road racer single shows that something 1-5/8" ID pipe is best for 6000-7000 red line coupled with a manx megaphone. Lindsay Kyle, who uses this system is getting a solid 45 bhp, so the math seems to supply a good starting point.

Warning! This thread is more than 10yrs ago old.
It's likely that no further discussion is required, in which case we recommend starting a new thread. If however you feel your response is required you can still do so.