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Author Topic: Can't find any #'s on my K1 Carbs, so Main Jet should be ??  (Read 727 times)

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Offline Spanner 1

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Can't find any #'s on my K1 Carbs, so Main Jet should be ??
« on: April 16, 2009, 08:37:03 PM »
The stats say the carbs could be 3 different types and the main jets either 105's; 110's or 120's...how do I know...can't find any number stamped anywhere on the carbs...?


Can't believe I'm posting as a K1 guy...OMG..this has taken 39 years of loving/lusting after a K1 CB750.....now I have one  !!!
« Last Edit: April 16, 2009, 08:40:39 PM by Spanner 1 »
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If your sure it's a carb problem; it's ignition,
If your sure it's an ignition problem; it's carbs....

Offline mlinder

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Re: Can't find any #'s on my K1 Carbs, so Main Jet should be ??
« Reply #1 on: April 16, 2009, 08:52:14 PM »
K0's and some (maybe all) k1's came with 120's.
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Offline Spanner 1

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Re: Can't find any #'s on my K1 Carbs, so Main Jet should be ??
« Reply #2 on: April 16, 2009, 09:05:14 PM »
I feel a 'plug chop' coming-on, when I get the thing going..lots to do yet....can't wait for that 4 into 4 no 'baffles' sound.....for now it's 120 mains, are there any #'s on the early carbs ??
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If your sure it's a carb problem; it's ignition,
If your sure it's an ignition problem; it's carbs....

Offline Gordon

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Re: Can't find any #'s on my K1 Carbs, so Main Jet should be ??
« Reply #3 on: April 16, 2009, 09:07:33 PM »
AFAIK, jetting changes didn't happen until the K2, so 120's should be stock for your bike. 
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Offline mystic_1

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Re: Can't find any #'s on my K1 Carbs, so Main Jet should be ??
« Reply #4 on: April 16, 2009, 09:07:33 PM »
Carb casting number should be on a flat on the topside of the carbs, right where they mate to the aluminum mounting plate.

mystic_1
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Offline Spanner 1

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Re: Can't find any #'s on my K1 Carbs, so Main Jet should be ??
« Reply #5 on: April 16, 2009, 10:11:54 PM »
Thanks Mystic and all replies...yes the carb # is stamped where Mystic said and should be a 120 for stock set-up...thanks, lads.


BTW it says 7A  ( carb type )
« Last Edit: April 16, 2009, 10:13:37 PM by Spanner 1 »
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If your sure it's a carb problem; it's ignition,
If your sure it's an ignition problem; it's carbs....
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