main jet question

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Eddie
To the on ramp
Posts: 280
Joined: Fri Oct 19, 2012 9:57 am
Country: U.S.
Suzuki 2-Strokes: 1974 gt750, 1963 superhawk

main jet question

Post by Eddie »

sorry for so many posts, but this is my 1st gt750,,, when i took the carbs off the 1st time it had round main jets , i saw the suzuki bulletin that says it had hex head jets? does this matter? the p.o. must have put round, im not sure if it really matters but figure I would ask...also the rebuild kit I bought had round? probly not a deal I guess,
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Coyote
Moto GP
Posts: 3404
Joined: Tue Oct 21, 2008 2:41 pm
Country: USA
Suzuki 2-Strokes: GT550x2, GT750, GS1000
Location: Tulsa, Oklahoma

Re: main jet question

Post by Coyote »

I can't say for the 74, but my 77 definitely had round head jets.
I did a search on alpha sports and they show all to be alike from 74 thru 77. 110 L&R, 107.5 center. So I would say your jets are correct. TZ ir Ian may correct me. If I recall, the hex head jets would have wild numbers like 160. The specifications were different.
I was born with nothing and still have most of it left.

.
1978 GS1000C
1976 GT550 ongoing money pit.
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Coyote
Moto GP
Posts: 3404
Joined: Tue Oct 21, 2008 2:41 pm
Country: USA
Suzuki 2-Strokes: GT550x2, GT750, GS1000
Location: Tulsa, Oklahoma

Re: main jet question

Post by Coyote »

Eddie, I sent you a PM.
I was born with nothing and still have most of it left.

.
1978 GS1000C
1976 GT550 ongoing money pit.
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tz375
Moto GP
Posts: 6211
Joined: Mon Nov 03, 2008 10:47 am
Location: Illinois

Re: main jet question

Post by tz375 »

Coyote is correct. 74 on CV style BS40 carbs use round main jets. Hex jets of the same number do not flow the same amount of fuel.
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