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From the Suzuki carb parts fiches for 77-79 gs750b,c,e, &n models:
19-1..o ring b 13295-33010 $2.82
19-2..o ring c&ec 13246-43010 $2.74
both of these are the pilot air screw o-rings. it makes no mention of the N model, which is the code for 1979, and if you look up the separate fiche for a 1979 750, it does not give you any part number or notation for this o-ring, but it shows in the schematic just the same as the 77 or 78 fiche, both of which list 77 and 78 models.
I ordered the cycleorings.com kit that RobertBarr on GSR put together, and after a year, I backed the pilot air screws out to clean the carbs, and the air screw o-ring on two of them rolled over it's recessed area on the pilot air screw and ripped apart as I was unscrewing them. I thought this happened because maybe I did not lubricate the o-ring enough (I used motor oil) on initial install, & the rubber just gripped the carb body too well because it was dry, now I am thinking that also because maybe a it was a slightly different size.
I was placing a Suzuki parts order from partsoutlaw.com for GS650 parts,and figured I had better get some replacement o-rings for the 750 carbs, as the ones that I found locally did not fit well. is when I noticed the two different part numbers for 77 vs 78. I was planning on probably ordering both of them, as I have no idea what year my carbs are off of, and my engine serial number led me to believe that maybe I had a 78 engine in my 77 bike, and bass cliff's carb chart does not include the exact Mikuni OEM number that my carb has, but several that are very close.
has anyone else ever ran into this problem? any idea on why this screw and over and are not even listed on the 79 fiche for the N models, despite being shown in the diagram?
19-1..o ring b 13295-33010 $2.82
19-2..o ring c&ec 13246-43010 $2.74
both of these are the pilot air screw o-rings. it makes no mention of the N model, which is the code for 1979, and if you look up the separate fiche for a 1979 750, it does not give you any part number or notation for this o-ring, but it shows in the schematic just the same as the 77 or 78 fiche, both of which list 77 and 78 models.
I ordered the cycleorings.com kit that RobertBarr on GSR put together, and after a year, I backed the pilot air screws out to clean the carbs, and the air screw o-ring on two of them rolled over it's recessed area on the pilot air screw and ripped apart as I was unscrewing them. I thought this happened because maybe I did not lubricate the o-ring enough (I used motor oil) on initial install, & the rubber just gripped the carb body too well because it was dry, now I am thinking that also because maybe a it was a slightly different size.
I was placing a Suzuki parts order from partsoutlaw.com for GS650 parts,and figured I had better get some replacement o-rings for the 750 carbs, as the ones that I found locally did not fit well. is when I noticed the two different part numbers for 77 vs 78. I was planning on probably ordering both of them, as I have no idea what year my carbs are off of, and my engine serial number led me to believe that maybe I had a 78 engine in my 77 bike, and bass cliff's carb chart does not include the exact Mikuni OEM number that my carb has, but several that are very close.
has anyone else ever ran into this problem? any idea on why this screw and over and are not even listed on the 79 fiche for the N models, despite being shown in the diagram?
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