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Xt250 forks, dt2 frame and hub?

26 Oct 2020 16:30 26 Oct 2020 17:52 by Redbanner.
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Xt250 forks, dt2 frame and hub? #1
Can you guys tell me what front hub this is?
I grabbed a set of forks off a rt180, they didn't look familiar to me so I thought they might be something cool.
I quickly found out they where stock 80-83 xt250 forks and triples. As they are distinctively finned.
They where a direct bolt in for a 72 dt2 frame, but have 35mm tubes, and less offset, they do barely touch the tank without modifying the steering stops.

They came with this wheel, but I don't know what its off of. It looks to match my 72 dt2 front wheel exactly. But flipped over.
It is has the stock xt axle, stock xt spacer.
And what appears to be a stock dt2 front wheel.
With about a 1/8 washer added to the left side.

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26 Oct 2020 17:14
MarkT
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Xt250 forks, dt2 frame and hub? #2
Yamaha recycled parts for decades... so not surprising a later model had basically a DT2 drum... if that's what you're asking?

1990's RT180 shared several parts with some of the 70's and early 80's models... including the rear hub and brake.

1963 YG1-T, 1965 MG1-T, Allstate 250, 1970 CT1b, 1971 R5, 1973 AT3MX, 1974 TS400L, 1975 RD350, 1976 DT175C, 1976 Husqvarna 250CR, 1981 DT175G, 1988 DT50, 1990 "Super" DT50, 1991 RT180, 2017 XT250

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26 Oct 2020 17:53
Redbanner
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Xt250 forks, dt2 frame and hub? #3
I'm wondering what hubs they are, at the moment.
So I can find a rim and spokes.
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26 Oct 2020 18:50
HouseofEnduro
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Xt250 forks, dt2 frame and hub? #4
I installed a complete '78 XT500 front end on my '69 DT1, it fit without any problems, and it came with the narrow brake and conical style hub that was common on Yamahas from the mid 70s onward. The brake is on the left side, just as it was with the stock '69 set up. The hub you have pictured is an early '70s version and certainly appears to be exactly what came stock on a DT2, I think it would be safe to assume the measurements for '71-73 DT and RT hub and spokes would apply there.
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26 Oct 2020 19:25
MarkT
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Xt250 forks, dt2 frame and hub? #5

Redbanner wrote: I'm wondering what hubs they are, at the moment.
So I can find a rim and spokes.


Ahhh... got it. If you look inside the brake drum side of the hub often there is a number cast in the aluminum... often coincides to a model code... which will identify what model the casting was originally designed for.

1963 YG1-T, 1965 MG1-T, Allstate 250, 1970 CT1b, 1971 R5, 1973 AT3MX, 1974 TS400L, 1975 RD350, 1976 DT175C, 1976 Husqvarna 250CR, 1981 DT175G, 1988 DT50, 1990 "Super" DT50, 1991 RT180, 2017 XT250
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26 Oct 2020 21:07 26 Oct 2020 21:09 by Redbanner.
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Xt250 forks, dt2 frame and hub? #6
Thanks guys, I will pull the front wheel out and check the casting number.

One more thing, about these fork tubes, I had assumed I push the top cap down, and would get access to the clip that retained it, like a secca.
I can see the clip, but I can not depress the top cap.
Am I missing something (besides the fsm). Thanks.

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26 Oct 2020 21:29
RT325
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Xt250 forks, dt2 frame and hub? #7
Terrible design those fork tops. Looks like the plastic caps have let the moisture under there. CRC-5.56 spray or whatever penetrating oil you use. Then with the bike sitting on a box so topped out, just tap the top with a brass punch or something that's not going to do any damage, & hopefully it'll free up to the point of accessing the circlip. Its a round clip & have to get a knife under it to get out of the groove. Tis a pain. I don't think that top moves far down past the clip before it's limited by a step. Theory is for the springs to push it out, but be careful or it'll take ya eye out. I wouldn't advise putting the weight of the bike on the springs, but i've done worse lol but if ya have to to get the top to jump out then i'd be trying to limit its movement. Can't even think how. Maybe a right angle bracket over the top so it'll only pop up level wioth the top of the fork tube or you'll have spring & oil flying. Hope its not that tight!!. Had those forks on my DT1 & didn't like them much.
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26 Oct 2020 21:33
RT325
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Xt250 forks, dt2 frame and hub? #8
one more thing & i see the forks are way above the top yoke. But if they were set flush as when in an XT250, you'd need to loosen the top fork yoke clamp or it 'can' squashes the tube a very small amount but enough to stop the top coming out.
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26 Oct 2020 23:14 27 Oct 2020 16:22 by Redbanner.
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Xt250 forks, dt2 frame and hub? #9
Thanks, I was sure I pushed them down. But didn't want to force it without confirming.
I do have them raised up a bit in the trees, but just for fiddling with them.
The stock feeling for these forks leaves a lot to be desired, they are incredibly lightly sprung. About half the spring weight i want really.
But they are 35mm, so I have lots of options for springs, I think.
They are quite a bit lighter than the original forks also.
Significantly so.

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27 Oct 2020 00:22 27 Oct 2020 00:25 by RT325.
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Xt250 forks, dt2 frame and hub? #10
Ya going to have to run the 'trees' because of the offset & on full lock they will likely hit the tank. Due to the length "although you can slide them to where you like" you'll need to run longer shocks on the rear, but then should add an couple of inches to the swingarm so it sits right & looks good. Not like my overdone rat bike!! I used to have a PE250 arm in it which is slightly shorter & looked good. But this RM125 arm i now have is too long. DT2 frame too, but altered at the top subframe. Not the bike i had the XT forks on, that was years ago on an DT1. I'll find a pic so you can have a laugh.

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