« previous next »
Pages: [1]   Go Down

Author Topic: carb fitting  (Read 905 times)

0 Members and 1 Guest are viewing this topic.

Offline Mafia

  • Full Member
  • *
  • Posts: 57
carb fitting
« on: February 01, 2014, 09:22:48 AM »
Noob question. Upon mounting my carbs I feel like they are not going on far enough.it feels like they seat bit there is a gap between the carb body and the boot. My rubber is good and I have applied constant equal pressure by using rope. I see the groove on yhe carb but the space is bugging me.should they be flush against the carb body? 1977 cb750 f2 with pd carbs.
Logged
Of all the things I've lost, I miss my mind the most

Offline martin99

  • UK Based, Non-
  • Master
  • *****
  • Posts: 1,733
  • Adventure before Dementia
Re: carb fitting
« Reply #1 on: February 01, 2014, 12:53:04 PM »
Talking about the airbox side? The rubbers don't go right up against the carb body, they just butt up to the ridge around the inlet. If you're talking engine side, then yes the rubbers should be tight up against the backplate.
Logged
Build threads:
77 750F2 Refresh Project http://forums.sohc4.net/index.php?topic=144075.0
TRIBSA http://forums.sohc4.net/index.php/topic,160296.0.html

1977 CB750 F2
1958 Norton Model 99
2011 Triumph Street Triple 675

Offline Don R

  • My Sandcast is a
  • Really Old Timer ...
  • *******
  • Posts: 19,896
  • Saver of unloved motorcycles.
Re: carb fitting
« Reply #2 on: February 02, 2014, 07:12:11 PM »
Put a 2x4 across the face of the carbs, insert a pry bar through the notch in the frame using something soft at the pivot point, above the 2x4. Pry against the 2x4 moving from side to side until the carbs pop on. Buy new carb rubbers too if you can.

This belongs in the tech section.
Logged
No matter how many times you paint over a shadow, it's still there.
 CEO at the no kill motorcycle shop.
 You don't need a weatherman to know which way the wind blows.

Offline Mafia

  • Full Member
  • *
  • Posts: 57
Re: carb fitting
« Reply #3 on: February 02, 2014, 07:13:22 PM »
Rgr.ty
Logged
Of all the things I've lost, I miss my mind the most

Offline Bankerdanny

  • Eventually I will be old enough in reality to be
  • Really Old Timer ...
  • *******
  • Posts: 7,626
  • Endeavor to persevere
Re: carb fitting
« Reply #4 on: February 03, 2014, 03:25:23 PM »
Heat and a little bit of lithium grease are your friends here. Use a hair dryer to warm up the rubber right before the install, it will make the rubber much more pliable. I also use a very thin smear of grease on the inside of the boots.

If you are part way there just use the heat to soften. You should feel the boots pop into place on the manifolds and carbs.
Logged
"The problem with quotes on the Internet is that you never know if they're true" - Abraham Lincoln

Current: '76 CB750F. Previous:  '75 CB550F, 2007 Yamaha Vino 125 Scooter, '75 Harley FXE Superglide, '77 GL1000, '77 CB550k, '68 Suzuki K10 80, '68 Yamaha YR2, '69 BMW R69S, '71 Honda SL175, '02 Royal Enfield Bullet 500, '89 Yamaha FJ1200

Offline LesterPiglet

  • Old Timer
  • ******
  • Posts: 4,046
  • 1977 CB550F2
Re: carb fitting
« Reply #5 on: February 03, 2014, 03:28:28 PM »
A picture may help us to help you.  ;)
Logged
'Then' and 'than' are completely different words and have completely different meanings. Same with 'of' and 'have'. Set and sit. There, their and they're. Draw and drawer. Could care less/couldn't care less. Bought/brought FFS.


Les Ross.            Certified by a Professional

Offline Mafia

  • Full Member
  • *
  • Posts: 57
Re: carb fitting
« Reply #6 on: February 03, 2014, 03:30:24 PM »
Lil heat did the trick thanx a lot everyone. Easier than I thought once the heat was on!
Logged
Of all the things I've lost, I miss my mind the most
Pages: [1]   Go Up
« previous next »