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Discussion Starter #1 (Edited)
The other day I was telling a fellow co-worker about the Single Carb Conversion I was doing. (He looked at me as if I was an idiot)He told me that the Original 4s were the best option. (HIS OPINION) I told him that the slides for my carb were hard to obtain. He stated that the 75-79 slides were all the same! I told him not so, due to the EPA forcing the bike companies to lean out the carbs for emissions reasons.(IMO) I dont recall if they are interchangeable, But if one does that, isnt it impossible to get the carbs to run correctly??:?
Thanks.
 

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Junior Grue
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The mixture is controlled by jets including the needle jet which goes in the slide but is not part of the slide so your friend may well be correct.
 

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carb slides

I have never had much luck replacing slides. They never seem to operate as smoothly or would bind in the carb bore.


Rayjoe
 

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Average Goldwing Rider
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The slides on my '72 CB450K5 are the same as the 75-79 GL1000. Between the 450 and 1000, the needles, jets and venturi sizes are different. The caps and pistons are easily damaged. I had three sets of carburetors to go through to pick the best parts for the 450.

Everyone is entitled to their own opinion, but there is a reason Honda settled in on individual carburetors and exhaust for most of their bikes. They didn't do this because it was cheaper. After rebuilding my first Keihin carb in 1970 I pretty much have them figured out. When you get the dialed in they are hard to beat.

The EPA implemented motorcycle exhaust emission regulations in 1978. I believe this was the first set of regulations and they became more restrictive as time went on.
 

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Discussion Starter #5
My slides also never acted smoothly in the bores either. I never wanted to use any abrasives on them due to their super tight tolerances, so after busting a couple of those slides, I figured the Single Carb was the way to go!
After talking to my cousin, he is willing to give me a hand setting up the single carb. He works at the Metro Bus Garage. So, hopefully all works out!
 

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Discussion Starter #7
I will find out soon. I just ran out of intelligence to go the last mile. Getting help from my cousin after the Holiday season. (fingers crossed)
Merry Christmas/ Happy Holidays... your choice.
 
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