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Can OIF forks be retrofitted to 1966 T100R #782078 08/20/19 11:35 pm
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Mark Creighton Offline OP
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I have a 1966 T100R Tiger with 6" extended forks. Is it possible to retrofit OIF forks? The 1967 500's could use the OIF forks with an adapter kit, but these models used a different top fork assembly and yoke.

Any help or advice would be appreciated.

Thanks.

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Re: Can OIF forks be retrofitted to 1966 T100R [Re: Mark Creighton] #782089 08/21/19 12:51 am
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Jon W. Whitley Online Content
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Originally Posted by Mark Creighton
I have a 1966 T100R Tiger with 6" extended forks. Is it possible to retrofit OIF forks? The 1967 500's could use the OIF forks with an adapter kit, but these models used a different top fork assembly and yoke.

Any help or advice would be appreciated.

Thanks.



I have no doubt you could with some ingenuity. You could probably find or have a spacer.sleeve made up that would sit at the top of the steering stem to take up the space needed for the smaller top steering race and 3/16" ball bearings. Or...just fit a correct front end to it and not have to worry about it. The big question, is why are you thinking of going the OIF front end route ?


Jon W.


1957 6T Thunderbird 650
1968 T100R Daytona 500
1971 TR6R Tiger 650
1970 BSA A65F 650
1955 Tiger 100 - Project

Re: Can OIF forks be retrofitted to 1966 T100R [Re: Mark Creighton] #782247 08/22/19 6:20 pm
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Why OIF forks?

T150/160 forks are the same but have a different yoke (bottom) because the frame was still tank based and I don't think it changed ?

Re: Can OIF forks be retrofitted to 1966 T100R [Re: Mark Creighton] #782276 08/22/19 11:17 pm
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UGOTBIT Offline
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I believe the T150/160 lower tree has a longer stem so you get the correct bite on the threads using them on a non-OIF frame.

I have a set of those forks on my 67, spacers were made for the bearings but I know there were companies out there that offered the spacers with bearings as a "kit".

The trouble comes with using anything other than a conical wheel/hub, due to the width of the forks and bearing locations on axle.


1967 TR6 = 650 ways to waste money
Re: Can OIF forks be retrofitted to 1966 T100R [Re: UGOTBIT] #782280 08/23/19 12:12 am
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Mark Creighton Offline OP
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Thank you for all of the replies.

I haven't been able to find a set of original forks. I have seen a few of the OIF forks for sale. I have seen the spacer kits for the OIF forks, but they will not fit the 1966 T100 frames.

The OIF forks are 1.360" (34.54mm). The T100 is using 33mm forks.

Re: Can OIF forks be retrofitted to 1966 T100R [Re: Mark Creighton] #782357 08/23/19 6:19 pm
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Roadwarrior Offline
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Put an ad on the Garage sale board. I’d stick with stock.





Bob M.
Re: Can OIF forks be retrofitted to 1966 T100R [Re: Mark Creighton] #782386 08/23/19 10:29 pm
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Jon W. Whitley Online Content
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Originally Posted by Mark Creighton
Thank you for all of the replies.

I haven't been able to find a set of original forks


You are welcome and as far as your search goes, I don't know your search criteria but I will venture to say that you haven't been looking hard enough and in all the right places. These things are not rare and are relatively easy to come by.


Originally Posted by Roadwarrior
Put an ad on the Garage sale board. I’d stick with stock.


Definitely a step in the right direction. I might even have a set of triple trees, maybe a set of fork lowers and possibly a wheel for that model.


Jon W.


1957 6T Thunderbird 650
1968 T100R Daytona 500
1971 TR6R Tiger 650
1970 BSA A65F 650
1955 Tiger 100 - Project

Re: Can OIF forks be retrofitted to 1966 T100R [Re: Mark Creighton] #782433 08/24/19 6:59 am
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Is my memory correct? The OIF front forks where wider? So you would also need to use a later wheel cos the axle of your original wheel [if you have one] would not be long enough?

Re: Can OIF forks be retrofitted to 1966 T100R [Re: Mark Creighton] #782482 08/24/19 9:40 pm
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Mark Creighton Offline OP
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Jon,

I have already placed an ad on the Garage Sale board.

Can you suggest where the right places are?

The bike has the original triple trees and fork lowers.

Re: Can OIF forks be retrofitted to 1966 T100R [Re: Mark Creighton] #782536 08/25/19 2:29 pm
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Jon W. Whitley Online Content
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Originally Posted by Mark Creighton
Jon,

I have already placed an ad on the Garage Sale board.

Can you suggest where the right places are?

The bike has the original triple trees and fork lowers.



Mark,

When you say forks, to some people that could includes everything from the triple trees, stanchions (fork tubes) fork lowers (sliders) and wheel, ready to be installed on the bike...aka as a front end. Or, in my experience, the front end minus the wheel are the forks. Whatever anyone calls them, what the rest of us really need to figure out is...what exactly are you looking for ?

Now that we know that you have the triple trees and fork lowers, is it the fork tubes (stanchions) that you are in need of, along with a correct front wheel ? The wheels are easy to come by and plentiful. The stanchions are too and can be purchased new from the various parts vendors as well as on eBay, etc..


Jon W.


1957 6T Thunderbird 650
1968 T100R Daytona 500
1971 TR6R Tiger 650
1970 BSA A65F 650
1955 Tiger 100 - Project

Re: Can OIF forks be retrofitted to 1966 T100R [Re: Jon W. Whitley] #782627 08/26/19 3:44 am
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I put '71 forks on my '68. The stem on the '71 is shorter and smaller dia. than the '68. Got the roller bearing kit for the '68 and had spacers made for the smaller stem to fit the larger '68 bearings. The lower bearing fits right at the very bottom of the '71 stem and that lets the shorter stem protrude far enough through the neck of the frame so the center taper nut can thread onto it. In fact you will have to grind a bit off the bottom of the nut so it won't interfere with the upper bearing. Also need to grind the bits of the upper and lower trees where they interfere with the '68 frame. I like the cleaner look and they are easier to come by

Re: Can OIF forks be retrofitted to 1966 T100R [Re: Mark Creighton] #782634 08/26/19 5:18 am
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DMadigan Online Content
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Simplest solution is to make a new stem with the proper diameters for the '68 bearings with the ends sized for the OF triple clamps. No grinding, filing, spacers et cetera.

Re: Can OIF forks be retrofitted to 1966 T100R [Re: DMadigan] #782734 08/27/19 5:32 am
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DMadigan is that something you've done before? Looks a damned site more complicated than turning a couple of bushings, to me.

Re: Can OIF forks be retrofitted to 1966 T100R [Re: sblckwd] #782745 08/27/19 12:00 pm
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I did the same on a B44 just the other day. The bushings I made have no check for the outer tapered roller bearing so they pass thru and seat on the headstock tube. Otherwise, with a check, the center stem would not be long enough. It's not ideal, as the bearing may not be perfectly square in the head, but it seems to work OK. In this photo, you can see the top and bottom edges of the seals, as I neglected to leave the bushings long enough. But after a half day of machining these out of steel on my little Asian lathe, I really didn't feel like remaking them! The center stem is just long enough in this fashion for the top sleeve nut to be clamped solidly. I may shorten the sleeve nut for looks.
Tom
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Last edited by koncretekid; 08/27/19 12:05 pm.

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Re: Can OIF forks be retrofitted to 1966 T100R [Re: Mark Creighton] #782757 08/27/19 3:22 pm
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DMadigan Online Content
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Not that in particular but I did make new stems to adapt GSXR600 forks to my aluminum Wenco style frame and GSXR1000 forks to the Spondon Norton rotary frame.

Re: Can OIF forks be retrofitted to 1966 T100R [Re: Mark Creighton] #782850 08/28/19 8:46 am
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If you have 6" over forks then you should have most of the proper parts to mate with standard length stanchions and hence get your bike back to std. Standard length stanchions are readily available so not sure why the rush to fit OIF parts.

Re: Can OIF forks be retrofitted to 1966 T100R [Re: kommando] #783254 09/02/19 7:13 am
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Originally Posted by kommando
If you have 6" over forks then you should have most of the proper parts to mate with standard length stanchions and hence get your bike back to std. Standard length stanchions are readily available so not sure why the rush to fit OIF parts.

I can think of a good reason; new OIF bottom members/sliders are available while the steel sliders aren't, and they're usually worn inside with no practical way to reclaim them.
You do a bike up to a high standard and then have to ride it around with sloppy forks, it's a real pain.
If someone came up with a solution to this, I'd pay good money to have it done.

Re: Can OIF forks be retrofitted to 1966 T100R [Re: Mark Creighton] #783266 09/02/19 10:49 am
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Not sure if it can be done on the steel ones, they may not be thick enough to remove metal? But I have sleeved both my Trident and TSS alloy forks. Set them up in a lathe and cut a minimum amount of alloy away for say 6" down. Then insert a bronze tube - tight press fit, so heat the leg - then set this in a lathe and turn the bronze to the fork tube dimensions.

I did this because the top section of the alloy fork leg had deep scratches/gouges in it. Aluminium on hard chrome isn't really a good idea anyway IMO, bronze is much better.

Re: Can OIF forks be retrofitted to 1966 T100R [Re: tridentt150v] #783516 09/05/19 2:21 pm
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Stein Roger Offline
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Originally Posted by tridentt150v
Not sure if it can be done on the steel ones, they may not be thick enough to remove metal? But I have sleeved both my Trident and TSS alloy forks. Set them up in a lathe and cut a minimum amount of alloy away for say 6" down. Then insert a bronze tube - tight press fit, so heat the leg - then set this in a lathe and turn the bronze to the fork tube dimensions.

I did this because the top section of the alloy fork leg had deep scratches/gouges in it. Aluminium on hard chrome isn't really a good idea anyway IMO, bronze is much better.

I've thought about doing the same on steel sliders but given the thin cross section of the tubes I believe the strength would be seriously compromised.
I've also thought about making a bronze sleeve with the same diameters as the top bushing and extend it to the bottom of the slider, effectively mimicking the alloy forks. But then I would have to construct an alternative dampener. The pre-59 type could possibly be modified to suit?
Kommando might have an opinion on this, is it a viable solution?

Re: Can OIF forks be retrofitted to 1966 T100R [Re: Mark Creighton] #783526 09/05/19 5:21 pm
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Lining the sliders only works for alloy, steel ones are too thin and there would be nothing left. The US has a lot more low mileage bikes than Europe so worn steel sliders are a lot less likely.

Best way to machine the alloy sliders is to drag a 2 cutter holder with a pilot body down the bore with a rod exiting out the bottom hole, doable on a long bed lathe by using the tailstock, the mulitple cutters centralises the cut as does the pilot as long as it is clearanced to the old correctly.

Re: Can OIF forks be retrofitted to 1966 T100R [Re: Mark Creighton] #783532 09/05/19 7:15 pm
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Or you turn a plate round with holes to match the slider studs, press a pin in the centre that is a slip fit in the damper bolt counterbore hole then bolt the slider to the plate and use a steady rest on the turned section where the boot sits. A spiral cutter in the tailstock or boring bar in the tool post to cut the recess about 2" deep. All the load is in the top inch or so, a bent tube is not going into a straight slider.


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