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Author Topic: CB360 carbs - again  (Read 446 times)

Offline crazypj

  • Posts: 13470
  • Split personality, I fake being smart
CB360 carbs - again
« on: Apr 09, 2019, 18:48:58 »
Bought a new 'toy' tool to measure angles accurately, decided to use it on 360 linkage between carbs. Found out the ones I just did were about 30 degree variation between left and right carbs. I've been ajusting the angle for years but never had a way to check both were equal until now (I know, should have made a gauge years ago  ::) ) Anyway, couple of pics showing it on left and right carbs after adjustment. nIf your having issues getting carbs in sync it may be worth taking a look at link



'you can take my word for it or argue until you find out I'm right'
Best thing I ever overheard
"yep, PJ's my boss, he taught me everything I know, just didn't teach me everything he knows"
Brian Morgan, 1982

CB360's,  http://www.dotheton.com/forum/index.php?topic=11736.0
XS650,  http://www.dotheton.com/forum/index.php?topic=11922.0

Offline crazypj

  • Posts: 13470
  • Split personality, I fake being smart
Re: CB360 carbs - again
« Reply #1 on: Apr 12, 2019, 16:45:05 »
I've taken some more measurements, no idea why I didn't think of it years ago but here it is for 745B carbs. The linkages are different lengths so can't be set parallel. Right carb (with adjuster screw) about 1" (25.4mm) centre of throttle shaft to centre of screw. Left carb, about 7/8" (22.?mm) to centre of 'U' shaped receiver.It means that the arms have to be at different angles to effectively 'shorten' the long arm and lengthen the short one. Itisn't really possible to open the 'U' shape more than 1/16" (1.5mm) but doing so does lessen the difference and make carbs operate MUCH smoother. I'm going to 'play' with a few more sets and see if I can come up with definitive angles so a checking gauge can be made.
'you can take my word for it or argue until you find out I'm right'
Best thing I ever overheard
"yep, PJ's my boss, he taught me everything I know, just didn't teach me everything he knows"
Brian Morgan, 1982

CB360's,  http://www.dotheton.com/forum/index.php?topic=11736.0
XS650,  http://www.dotheton.com/forum/index.php?topic=11922.0

Offline CrabsAndCylinders

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  • Posts: 2177
  • Careful With That Axe Eugene
Re: CB360 carbs - again
« Reply #2 on: Apr 14, 2019, 15:43:35 »
Very interesting, I'm looking forward to you next posts on this, thanks.
Lighter, Quicker, Faster.
ZX-14, 900F x 2, 1100F, R100, CBR600, SR500, GT500, RZ350, KZ1000 x 2, Moto Guzzi Lemans lll, CBX550, RD 350, 750 SOHC police special, RG250, TL1000R, GT750, KTM Super Duke 1290 R, Harris/Z-1, Norton 750 Commando, Green 77 KZ650

Offline redrover

  • Posts: 205
Re: CB360 carbs - again
« Reply #3 on: Jun 21, 2019, 03:26:11 »
This looks effing awesome! I definitely need one of these.

Offline CrabsAndCylinders

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  • Posts: 2177
  • Careful With That Axe Eugene
Re: CB360 carbs - again
« Reply #4 on: Jun 21, 2019, 16:06:05 »
Where did you get that that little gizmo?
Lighter, Quicker, Faster.
ZX-14, 900F x 2, 1100F, R100, CBR600, SR500, GT500, RZ350, KZ1000 x 2, Moto Guzzi Lemans lll, CBX550, RD 350, 750 SOHC police special, RG250, TL1000R, GT750, KTM Super Duke 1290 R, Harris/Z-1, Norton 750 Commando, Green 77 KZ650

Offline crazypj

  • Posts: 13470
  • Split personality, I fake being smart
Re: CB360 carbs - again
« Reply #5 on: Jun 22, 2019, 12:53:03 »
Came from China, I think I got it from Tom-Top?  Believe Bangood also has them and maybe Amazon? I know I've seen them advertised several places. Pretty cheap, needs de-burring but otherwise seems quite accurate and has vernier scale. Has a removable square and a straight edge that checks good with the Starret I have.
'you can take my word for it or argue until you find out I'm right'
Best thing I ever overheard
"yep, PJ's my boss, he taught me everything I know, just didn't teach me everything he knows"
Brian Morgan, 1982

CB360's,  http://www.dotheton.com/forum/index.php?topic=11736.0
XS650,  http://www.dotheton.com/forum/index.php?topic=11922.0

Offline CrabsAndCylinders

  • DTT SUPPORTER
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  • Posts: 2177
  • Careful With That Axe Eugene
Re: CB360 carbs - again
« Reply #6 on: Jun 22, 2019, 14:49:53 »
Thankyou :)
Lighter, Quicker, Faster.
ZX-14, 900F x 2, 1100F, R100, CBR600, SR500, GT500, RZ350, KZ1000 x 2, Moto Guzzi Lemans lll, CBX550, RD 350, 750 SOHC police special, RG250, TL1000R, GT750, KTM Super Duke 1290 R, Harris/Z-1, Norton 750 Commando, Green 77 KZ650