I'm building a frame for the first time for a divorced ironhead I've been working on and it just looks way too wide at 8" in between the bottom rails. I'm probably just gonna use a 16" sportster wheel and I was concerned about the chain scrubbing but it just looks fat. How skinny can I get it down to without that being an issue?
What is the skinniest a frame can be?
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Not trying to be a dick but if you are asking this question maybe you shouldn't be building frames? -
I'm building a frame for the first time for a divorced ironhead I've been working on and it just looks way too wide at 8" in between the bottom rails. I'm probably just gonna use a 16" sportster wheel and I was concerned about the chain scrubbing but it just looks fat. How skinny can I get it down to without that being an issue?Comment
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8 inch's Maybe too narrow for the chain and the mechanical brake rod? My Divorced Ironhead is 8- 3/8ths and would have liked another .250 in the span.I built a hybrid Sporty/Bigtwin frame with a fabbed hardtail section after stretching the lower bottom tubes 7 inches after cutting at the sporty casting/uptube motor mount section off to make real estate for the softail 5 speed.What year Sporty motor are you using?
Last edited by kmanator; 07-05-2018, 2:16 PM.Comment
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8 inch's Maybe too narrow for the chain and the mechanical brake rod? My Divorced Ironhead is 8- 3/8ths and would have liked another .250 in the span.I built a hybrid Sporty/Bigtwin frame with a fabbed hardtail section after stretching the lower bottom tubes 7 inches after cutting at the sporty casting/uptube motor mount section off to make real estate for the softail 5 speed.What year Sporty motor are you using?
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Its a 74. I'm using a disk brake in the rear and after measuring everything it looks like it'll fit with about a quarter inch on each side but I've been looking at some choppers that look like they're 6" all the way back. It may just look that way though. Mind if I ask what you used for the primary?
This is the ring gear I used:
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I had the sportster motor sprocket milled into a hub then .006 interference press fit into a double row shovelhead compensator ring gear then welded after the offset was established then used an 82 link bigtwin primary chain.The final sprocket has a .500 offset to get the sweet spot between the primary chain/trans. and final drive chain alignment.
This is the ring gear I used:
https://www.ebay.com/itm/NEW-HARLEY-...EAAOSw4shYARELComment
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I love that single-loop frame, soo clean!
While an unconventional approach, this is a very valid question. When considered without preconcieved notions of what a frame is, the answer is only limited by your imagination and safety constraints.
Dream-on, dude!Comment
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