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from four to two
- seanbarney41
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- '79 kz1000 LTD '75 Honda CB750
oops sorry, forgot they were already mentioned.
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- 650ed
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Weber Direct
1977 KZ650-C1 Original Owner - Stock (with additional invisible FIAMM horn)
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- loudhvx
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Interesting tests you did..... We should have a discussion on that in a new thread. There are some things I'd like to point out but I don't want to hijack this guys thread...
That would be great, but I'm betting very time consuming. I just barely started tinkering with it and ended up with pages and pages.
1981 KZ550 D1 gpz.
Kz550 valve train warning.
Other links.
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- LLC
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the outside cylinders starve with a single carb log. why not use a twin carb log?
The far cylinders will not starve. Like i said. Auto manufactures have been using loy type intake on four and six cylinders for many years. Engines ranging from 1.0L to 5.2.L This will be no different.
"IF you're doing what you love and doing it well, all the small stuff will come, put your heart into it and you'll still be here when the others are gone!"
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- LLC
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LLC, as far as using the Holley as a sidedraft, it won't work because of the float bowls. Yeah, a holley on a straight six is to the side of the engine, but it's still a downdraft, the intake is pointed up. MC carbs are sidedraft, the intake is in the horizontal plane with floatbowl oriented for proper operation. I don't know of any four barrel carb that is designed for sidedraft operation. What about SU carbs? They make some pretty honkin' sidedrafts!
oops sorry, forgot they were already mentioned.
Simple fact is A downdraft carb would work, All I would have to do is make an up turn in the intake manifold. Like i said before Im not going to use a holley never did and never will. That wasnt my idea. Only reason why, is it would look god awful with a 500CFM 4 barrel which sticking out the side of my bike. That would look silly and ridiculous.
Not to mention even using a 2 barrel holley at 350 CFM is stupid, the stock 1.0L doesnt require such a large amount of air. so I would have to use TINY jets which would pretty much defeat the purpose of using such a carb, and render it useless.
"IF you're doing what you love and doing it well, all the small stuff will come, put your heart into it and you'll still be here when the others are gone!"
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- LLC
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OK, forget the Holley. How about a nice Weber? They make sidedraft carbs. You KNOW a Weber would look trick on any bike! Scroll to the bottom of the link for examples:
Weber Direct
I did consider using a weber, there great carbs, theyre cheap and readily available parts. But I dont want anything that big.
I have fitment issues due to the style frame and the mid controls. I have to keep it as small as possible otherwise itll be hitting my knee.
Im going to run either a BS34 Mikuni or a Bendix/Zenith.
I have six BS34's laying around im gonna try it with one of those first, see how it does. If i end up needing a larger carb ill check out the bendix.
"IF you're doing what you love and doing it well, all the small stuff will come, put your heart into it and you'll still be here when the others are gone!"
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- seanbarney41
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- '79 kz1000 LTD '75 Honda CB750
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- LLC
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Ok LLC, I get ya now. I didn't really think you wanted to run a Holley. I was just shootin' the sh!+. Too bad the webers won't fit, I saw a stripped down Goldwing this summer that was runnin' downdraft Webers and it looked killer
Yah dont get me wrong I wish I could. But I dont want to slam my knee into the carb every time in need to hit the brakes quick ya know?
Those dual webers and badass. haha
Maybe the nest bike I do I might do something with a weber. The next one i build will have a stretched frame so the mid controls wont be so "mid" anymore. I might be able to fit something a little bigger then.
"IF you're doing what you love and doing it well, all the small stuff will come, put your heart into it and you'll still be here when the others are gone!"
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- 55fbomb
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1974 CB750
1975 CB750
197? CB750 mutt
1977 KZ1000
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- LLC
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I have talked to a lot of guys that used logs on cb750s and heard pretty much nothing good except they are different. good luck.
I dont understand why everyone is having hard time with this. Almost every auto manufacturer for the last 20 or more years has been creating vehicles with 4 and 6 cylinder engines with log style intakes. from carbs to fuel injection. this is not a new concept nor difficult. In fact itll be much easier to accomplish due to a motorcycle engine not needing the kind of atomization a larger engine would require. Its pretty cut and dry folks.
"IF you're doing what you love and doing it well, all the small stuff will come, put your heart into it and you'll still be here when the others are gone!"
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- larrycavan
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55fbomb wrote:
I have talked to a lot of guys that used logs on cb750s and heard pretty much nothing good except they are different. good luck.
I dont understand why everyone is having hard time with this. Almost every auto manufacturer for the last 20 or more years has been creating vehicles with 4 and 6 cylinder engines with log style intakes. from carbs to fuel injection. this is not a new concept nor difficult. In fact itll be much easier to accomplish due to a motorcycle engine not needing the kind of atomization a larger engine would require. Its pretty cut and dry folks.
Post some photos of what you're working with for space restrictions....
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- Kidkawie
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4 and 6 cylinder engines with log style intakes. from carbs to fuel injection. [/quote]
I've only seen "log-type" intakes for multi point FI. I'm not saying your project won't work, but any throttle-body FI or carb usually has runners (ideally) close to equal length.
1975 Z1 900
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