Mikuni VM32 manifold for 1965 CB450?
Close

Mikuni VM32 manifold for 1965 CB450?

This is a discussion on Mikuni VM32 manifold for 1965 CB450? within the Technical forums, part of the Caferacer.net Forums category; Hello folks. I'm looking for some carb manifolds (insulators) for my 1965 CB450. The stock manifolds were made to attach to the original Keihin's that ...

Results 1 to 5 of 5
  1. #1
    Junior Member davidw's Avatar
    Join Date
    May 2010
    Location
    San Clemente, California, USA.
    Posts
    16

    Mikuni VM32 manifold for 1965 CB450?

    Hello folks. I'm looking for some carb manifolds (insulators) for my 1965 CB450. The stock manifolds were made to attach to the original Keihin's that had a spigot diameter of approximately 43mm. The Mikuni's spigot diameter is 40mm. The CB450's bolt holes for mounting the carb manifolds are approximately 64mm apart, whereas the only SUDCO Mikuni manifolds (flanges) with a 40mm spigot diameter either have a 60mm or 75mm mounting bolt hole diameter. Does anyone know where I can get some Mikuni VM32 manifolds for my CB450? Oh, and it would be a bonus if they were angled like the 350 manifolds (the battery box is not removable and it is tight in there). Thanks!

    David

  2. #2
    Senior Member bmartin's Avatar
    Join Date
    Feb 2008
    Location
    Palmyra, NY, USA.
    Posts
    2,740
    I'm just going through this same issue with a mikuni installation on one of my bikes - Sudco makes different size manifolds with various spigot openings and diameters. They even have angled manifolds. Take your carb parts down to your local bike dealer, they should be able to match up your requirements in their parts unlimited book. Your might even be able to use your current manifold as a clamp should make up 3mm with no problem.
    Bob - Palmyra NY
    2 - 69 CB750, 1 Turbo
    1 - 71 CB750

  3. #3
    Junior Member davidw's Avatar
    Join Date
    May 2010
    Location
    San Clemente, California, USA.
    Posts
    16
    quote:Originally posted by bmartin

    I'm just going through this same issue with a mikuni installation on one of my bikes - Sudco makes different size manifolds with various spigot openings and diameters. They even have angled manifolds. Take your carb parts down to your local bike dealer, they should be able to match up your requirements in their parts unlimited book. Your might even be able to use your current manifold as a clamp should make up 3mm with no problem.
    I just talked to SUDCO tech support (Chad). He said they don't make a manifold to fit the 1965 CB450, but that they recommend using the stock manifold and "stuffing it in there". When I pointed out that the bead in the stock manifold and the groove on the mikuni spigot aren't even close to lining up, he recommended "milling down the spigot". Well, I can't do that...nor do I want to, just in case I need to return them. He didn't have any other ideas...nor did he seem to care [}]. I found a website in the UK with a manifold that looks like it might be really close:

    http://www.allensperformance.co.uk/p...manifolds.html

    It's the PM15 listed for an RG500 and VM34. The C dimension (35.5) on my stock manifold is 32mm, so I'm not sure if that step down going into the head will cause problems, and the A dimension (63) on my stock manifold is 64mm, close enough to buy and try, I guess. The PM14 listed for a TR500 and VM34 comes close, too, if it weren't for the 8.10 bolts (mine are 6). Interestingly, The PM16, listed for the CB450 (and the VM36!) is way off (except for the 65mm "GP centers"?). Maybe it's for a late model CB450. *sigh*

    Seems strange that such a thing isn't easier to find.

  4. Remove Advertisements
    CafeRacer.net
    Advertisements
     

  5. #4
    Junior Member joevirus563's Avatar
    Join Date
    Jun 2010
    Location
    Laval, Quebec, Canada.
    Posts
    12
    Hey buddy... found that: http://www.bikebandit.com/mikuni-mounting-flange

    Check the 62mm mine is around 63.

    See you around!

  6. #5
    Junior Member joevirus563's Avatar
    Join Date
    Jun 2010
    Location
    Laval, Quebec, Canada.
    Posts
    12
    Hey buddy... found that: http://www.bikebandit.com/mikuni-mounting-flange

    Check the 62mm mine is around 63.

    See you around!

Sponsored Links

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

Similar Threads

  1. mikuni vm32 jetting for 400cc
    By txchainsawgogi in forum Technical
    Replies: 25
    Last Post: 05-29-2012, 08:04 PM
  2. Mikuni VM32 carbs
    By manchildburns in forum Parts For Sale
    Replies: 6
    Last Post: 10-07-2010, 09:50 PM
  3. VM32 cb450 71 jetting + intake manifold
    By joevirus563 in forum Technical
    Replies: 9
    Last Post: 06-11-2010, 09:13 AM
  4. mikuni vm32's
    By snorkelfork in forum Parts For Sale
    Replies: 14
    Last Post: 02-26-2009, 11:36 AM
  5. mikuni vm32, how much scratch?
    By 736cafe in forum Vintage Motorcycle Racing
    Replies: 21
    Last Post: 01-24-2009, 02:43 PM

Search tags for this page

62 mm to carb flange mikuni
,
75mm cb450
,
cb450 carburetor mount
,
cb450 mikuni or keihin
,
how do i install mikuni carbs on a cb450
,

mikuni carb cb450

,
mikuni carb cb450 install
,
mikuni flange 62mm
,
vm32 on cb450 manifold
Click on a term to search for related topics.