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Sparky!!!
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Discussion Starter #21
As I have been digging around the internet for the past week or so, I think I might have also found some final drives that will swap with ours... not 100% sure yet, so I will add the wheel and final drive combos after I have finished my research.
 

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Would be great to find one with a spoked wheel, because thats wht Id like to go to. Front and rear both...black or red rims, and a fat whitewall !
 

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Sparky!!!
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Discussion Starter #23
:D I like your thinking... if its not raining tomorrow, I am going to see if I can pull some build numbers off of my final drive to see who built it, and what other final drives would work... I have a hunch that the 81-83 Viargo 750 might be a candidate.
 

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Funny you should mention the Virago...I think I read that elsewhere too.
 

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Sparky!!!
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Discussion Starter #25
I know for a fact the Viargo Front end works, and I have heard rumors that its the same final drive just a different pinion shaft.
 

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Question, can a person take an angle grinder and take the metal off of the upper tree where the gauges and ignition switch are mounted? IMO I don't think it would weaken the upper tree. I could be wrong, but it looks like there would still be plenty of metal left to support the handlebars. Wouldn't the bulk of the weight be on the lower part of the triple tree?
And on post 13 to me the stock forks look like they are narrower at the bottom as opposed to the top, or is it just an optical illusion?
 

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1) yes, its an optical illusion, mostly because the lower tubes are fatter than the uppers.
2) and yes, you can grind down tabs. but remember, its cast alloy, so you need to make sure there's no seam there, and that the underside isnt hollow at that point. Else ya gotta build it up with aluminum using a TIG.
Also, when grinding, do it slowly and gradually so ya dont heat it up too much. Could cause a subliminal failure in the metal, and we wouldnt want that, would we ?
 

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Sparky!!!
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Discussion Starter #28
TSmith, you could grind/cut off the tabs, and I have thought several times to do just that, and every time I pick up my grinder to do it... this is what I see in my head....



which is definitely not sexy
 

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Looking at that slim, I can see how it would be a PITA. A LOT of work to cut the metal away where the ignition switch and the rest of the metal in the center is. Looks like it would be fairly easy to bugger it up beyond repair.
Has anyone adapted a springer to their bikes? Or would it be possible at all.
 

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Has anyone adapted a springer to their bikes? Or would it be possible at all
Yes...same as in the pdf I posted above. Later model Sportster forks are compatible. Both OEM are made by Showei. My buddy knows a guy thru his shop that can make a set for ANY bike for around $300-450. And then, ya always got SugarBear, but they aint cheap.
 

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Sorry Wolfie, I missed it. I didn't read the PDF on those. I think a springer would look badass on our bikes with a fat tire with a nice wide whitewall tire on both ends.
 

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Sparky!!!
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Discussion Starter #33
Looking at that slim, I can see how it would be a PITA. A LOT of work to cut the metal away where the ignition switch and the rest of the metal in the center is. Looks like it would be fairly easy to bugger it up beyond repair.
Has anyone adapted a springer to their bikes? Or would it be possible at all.
Haven't seen it done.. but thats not to say it can't be done... that is what the swap information chart is for.. if you can find a Springer running a tree with bearing out side diameters the I don't see why not.
 

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Not that you could afford any of it eh, TSmith ?...I cant either...still got 2 yr old bills from the hospital to pay, and they come first. Damn health.
I got a sweet solo seat waiting fer me for $30 at my buddys shop...think about it daily, but I got priorities. Heat being one, I got no heat right now, lol. Last thing I can think about is mods right now, inless I dumpster dive and make it myself.
 

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Fork Swapa, let me hepyaout

I admire initiative and determination, but reinventing the wheel just ain't necessary. The most comprehensive list of fork specs I know of is in a little pc of work titled "The Jap Bike Bible". For a list of HUNDREDS of specs, including other important details like axle size, bearings, neck sizes and such, try this link
http://www.clubchopper.com/forums/metric-chopper-talk/77043-jap-bikes-fork-tube-sizes-neck-bearings-axle-diameters.html.

Naturally, the one missing pc of info is the overall length.

I can tell you from my own front end conversion that the forks from a FZ600 are a slip in operation, give you much better valving and the handling is unreal compared to stock. You'll need a new 600 fender and the fender mount is actually a fork brace on the FZ so it's a double win-win. As the axle center is directly under the tube center, the rake remains the same but you eliminate 1.375 (one and three eigths) of trail, putting you at 3.65 inches trail and 32 degrees rake. The bike remains rock solid at speed, but the low speed handling (that wallowy fall over and wander sensation) is totally gone. Also, the slow high speed feel (loved by H-D guys, hated by MOTORCYCLE riders) is gone. Think about it and it turns, No more frame wobble crossing centerlines and bridge grates (tried on stock Dunlops, a Shinko front and a Pirelli front with a darkside Kuhmo rear<<an awesome x 2 combo)!)

And now to add to your list, I'll add that measuring other bikes in my garage. All measurements are wheel off the ground (fork extended) and from top of tube (not including any caps or pressure fittings) and fro tube top to axle centerline.

1975 Kaw Z1 = 30.375 inches long
2001 H-d Sportster xl1200 = 30.5
1986 VN750 = 33.5
2008 Yam VMax = 34

P.S., I finished the 34 to 36 mm carb mod and the digital NO2 addition to my "stock" VN750 as mentioned waaaay back as a project in the works. Showing 77 Hp @ 8200 on gas and 92 on the juice @ 9200. And the engine is holding up just fine, thank you!
 

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Sparky!!!
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Discussion Starter #36 (Edited)
Yes I saw this when I started my list, in fact a lot of my information came from that exact list.. but as you mentioned.. the fork tube lengths are missing, as well as the steering stem lengths on the triple trees. Also missing is an easy to use search function to find what will work. using my Exelle Sheet, you just sort by bike, neck bearing size, fork diameter, etc, and all the compatible fork information will be listed first.

I made this list because all the information is on the web, just very hard to find all the little pieces of information.
I also already posted your fork lengths in my first version of the Fork Swap Information Sheet.
 

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Forgot to mention

That unless you want to run the front w/o a fender and keep the 19 inch rim, you'll need to go with a 16 in rim and tire. That means a change in the speedo drive as well. I used the FZ speedo drive and tinkered w/the speedo itself to get it accurate.

One other thing for anyone considering swapping forks, is the caliper location. most of the early jap forks and disks are similar, but if you swap out the triple trees and all to go for 41 mm tube, yo're gonna need all the other goodies (disks, calipers, spacers, wheel) to get it on the road. And of course there will be some machine work to get the stem length right. It's easier to just take the tress to a machinist and have him cut and rethread to mate up to the vn750 head.

Of course, it's even easier to just put the gas in a different bike! But it doesn't matter, 'cause if you're like me, the next bike won't remain stock for long, either. No sense having a set of wrenches if the don't get used!
 

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Sparky!!!
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Discussion Starter #38
How much over stock are the FZ tubes? Most of us looking for the fork wap info are wanting to go 2-6" over. I assume that you are dropping the front suspension a few inches as well as giving a faster trail. If you notice all the responses to this thread all of us are looking for longer and slower trail... You mention that we can't keep the 19" wheel with out loosing the front fender... look at my sig and you would see I am not running a fender.

also, you link to "The Jap Bible" which is copied and pasted straight fro the Ohio Cafe Racer's home Page. My list is even more detailed, because I used the All Balls Conversion table and have been researching every bike that uses the same steering bearings (I am still not done, I have about 2,000 models to still go). There are at lest an extra 2 hundred bikes on my page that aren't listed in The Jap Bible. Also mine includes Euro, Brit, and American Bikes, not just Jap.
 

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been thinking that meself...but was waiting fer Slim to do it, since its his baby...
Should be stickied in "mods and fabs" though, no ?
 
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