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Post subject: TZR wheels into TDR
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Machine  Sunday Rider Joined: 11 Nov 2004 Total posts: 47 |
I realise i'm no doubt covering old ground here and that it'll probably be boring you to tears but I'm new around here and I'd appreciate any help people could give. For a start, have a look at these.
http://predator.bikepics.com/pics/yamaha-tdr250-89-bikepics-261022.jpg
http://predator.bikepics.com/pics/yamaha-tdr250-89-bikepics-261023.jpg
So who can tell me how much of that is correct? I know you can't get a bearing that's 35 x 15 x11 (that'd be far too easy..) but i have got some bearings 37 x 15 x 8 and had some spacers machined to slot into the front TZR wheel bearing housings to make the diameter up to 11mm. I'll also obviously need to get a spacer to go between the bearings that's 15mm bore and 6mm wider than the standard TZR spacer.
I'm not sure about the longevity of the narrower bearings though, how well they'll stand up to the load, so i'm now considering abandoning those and going for the NK Racing front conversion kit that i read about elsewhere on here. And does the caliper really need spacing? There's no mention of that with the NK kit on his website?
What about the rear? Is it really as simple as slotting the wheel in with an extra spacer on the chain side?
Any opinions or info on these or other methods of getting the wheels in and correctly aligned would be much appreciated, thanks.
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Last edited by Machine on Wed Dec 22, 2004 5:48 am; edited 1 time in total
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Posted: Tue Dec 21, 2004 2:54 am
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Don 1 All-gear Wheelie! Joined: 04 Aug 2003 Total posts: 1810 Location: Shropshire, UK |
1988 TZR 250 wheels.
Page 1.
Wrong.
If your using a TZR 250 wheel on the rear then you'll need:-
11mm spacer on the left (sprocket) side
22mm spacer on the right (brake) side.
The rear brake caliper then needs 10-11mm spacers on the bolts to bring it back into line with the disc. You should also
use longer bolts to hold the caliper on !
A TDR 250 rear wheel bearing is 11mm ! You can use the
centre race from one of those as a spacer if your stuck !
Measure the spacers you have now.
Use the two spacers on the right and one on the left.
Seems that people make the mistake of aligning the brake
disc with the caliper and THEN making spacers.
http://www.ns400r.co.uk/tdr250/black_yellow/misc/rear_wheel_alignment.jpg
This is wrong !
Correct Spacings.
http://www.ns400r.co.uk/images/tzr_tdr_rear_wheel.jpg
http://www.ns400r.co.uk/images/tzr_tdr_rear_wheel2.jpg
http://www.ns400r.co.uk/images/tzr_tdr_rear_wheel1.jpg
Page 2.
Not quite accurate.
Using the original spindle will mean purchasing new bearings at a high cost. I was quoted around £35 a pair as they are no longer standard items. *note* The original TZR front bearings are 37x12x12 not 37x12x11.
Best and easiest bet for the front wheel is to speak to a certain Nigel Kimber (he who ate all the pies that Mr Love couldn't manage) from this forum, he has a "kit" for fitting the front wheel.
Also, the TDR 250 speedo will read wrong (it will read high). You will need a TZR 250 clock for the correct speed readout as the 2 bikes use the same speedo drive but different sized wheels.
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Last edited by Don 1 on Tue Dec 21, 2004 1:09 pm; edited 1 time in total
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Posted: Tue Dec 21, 2004 11:40 am
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MachineSunday Rider Joined: 11 Nov 2004 Total posts: 47 |
Cheers.
So on the right rear is it the original spacer plus an additional 11mm? And is that the original TDR spacer or the original TZR spacer? And on the left rear is that the 11mm spacer on it's own or plus an original TZR or TDR spacer? Is the 11mm spacer one you had made, or a standard part? Do i use the TDR sprocket carrier or do i need to get a TZR one?
What method did you use for the front? Have you used the NK kit? Presumably with that i'll need a TZR speedo drive 'cos the 15mm bore TDR drive will be too big for the 12mm NK spindle. I've already got front bearings to run the TZR wheel on the TDR spindle, so if i use those (and keep the TDR spindle and cush drive) do you know if he's correct about cutting the original front right TDR spacer down and whether this will give a proper central alignment? He talks about spacing the front caliper but nothing else i've read mentions this as necessary?
Sorry to be a pain in the arse but i can't even look at owt 'cos the bike and boxes of bits are an hour and a half's drive away.
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Posted: Tue Dec 21, 2004 1:05 pm
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Don 1All-gear Wheelie! Joined: 04 Aug 2003 Total posts: 1810 Location: Shropshire, UK |
Rear.
Left side keeps the original 11mm TDR spacer.
Right side uses the original TDR spacer + a new 11mm spacer. Use spacers or washers to then move the brake caliper in line witht the disc.
Front.
My TZR wheel came pre fitted with a now obsure set of bearings, 37x15x9. I just had to adjust the spacers that were already there plus add a thin washer between the speedo drive and the inside of the drive housing in the wheel. Not doing this causes the speedo drive to "pinch" up when the spindle is tightened and locking the wheel.
I need to get the front wheel machine to use a more common bearing at some point.
Speak to Nigel about the front wheel. There are a few ways it can be done and his is one of the easier ones to do. I think that his kit uses the existing TDR spindle and speedo drive. Just need to find a TZR speedo or to remember that your speedo is reading slightly out. If I remember right, while doing an indicated 30mph the bike was actually doing 33-34mph. At an indicated 80mph it was actually nearer 86mph.
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Posted: Tue Dec 21, 2004 1:18 pm
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MachineSunday Rider Joined: 11 Nov 2004 Total posts: 47 |
The front bearings i have sound like yours. They're either 37 x 15 x 9 or 37 x 15 x 8 (can't remember 'cos it's years since i bought them), but i've had a spacer made for each side to sit under the bearing and make the width up to the full 11mm. When you say "adjust the spacers that ere there", do you mean just on the right? Doesn't the TDR have a spacer only on the right with just the speedo drive on the left? Did you have to space the front caliper?
Nigel's kit uses a narrower 12mm spindle with a sleeve that fits the right fork leg to take it down from 15mm to 12mm and a helicoil for the left fork leg, so the 15mm TDR speedo drive won't fit. He says he's never actually fitted one though, he just made the kit to a customer's spec.
I'm not bothered about fitting a TZR speedo, i'd rather keep the original on. Maybe fit a sigma just to check it against. If this thing ever sees daylight again it's only going to be a low mileage perfect weather toy.
What about the rear sprocket carrier? Did you use the original TDR carrier or a TZR?
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Posted: Tue Dec 21, 2004 1:58 pm
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Don 1All-gear Wheelie! Joined: 04 Aug 2003 Total posts: 1810 Location: Shropshire, UK |
My front wheel already had spacers fitted when I brought it. But like the rear, they weren't fitted correctly. I simply adjusted things a little to make the wheel central again. I can't remember if there are any original spacers used now. Not going out to look either, it's too damn wet and cold. I will look for you if your really stuck though. TZR 250 speedo drives are the same as the TDR one so a small sleeve to alter the internal diameter to 12mm should be easy to fabricate.
I think that those particular bearings aren't up to the job in the front wheel. Too narrow. That's why I want to change mine. That and the stupid replacement cost !
I used the rear sprocket carrier from the TDR no probs as, again, they are identical as far as I'm aware.
There are a few pictures Here but not too many show any real detail of the wheels.
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Posted: Tue Dec 21, 2004 2:28 pm
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MachineSunday Rider Joined: 11 Nov 2004 Total posts: 47 |
I'm a bit dubious about whether the bearings are substantial enough too. I only paid a couple of quid each for them though, so no big loss if i don't use them. I had thought about sleeving the speedo drive to 12mm too if i got the NK kit.
No need to be going out into cold garages just yet mate. The bike's in the next county and i've not even seen it for 2 years but i'm just getting ideas about finishing it since doing a bit of web surfing. Speed Triple needs a gearbox rebuild first, and then there's the Bandit...
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Posted: Tue Dec 21, 2004 6:03 pm
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Laurel&RDAll-gear Wheelie! Joined: 26 Aug 2003 Total posts: 1656 Location: Enfield London to Sarf Australia |
Machine,
I haven't read the whole conversation but if you want someone to make up the spacers etc for you (probably to Dons exact dimensions!) then have a look on Nigel Kimbers NKRacing.co.uk site. He does a lot of this sort of stuff for people 
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Posted: Tue Dec 21, 2004 7:01 pm
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BOSOZOKU Regular Racer Joined: 27 Jun 2004 Total posts: 477 Location: HIGH PEAK , DERBYSHIRE |
have you already got the TZR wheels ?. i will not need the set on my TDR in the new year (probably early spring  ) if you need a set( and spacers & stuff) just P.M me . lcless
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Posted: Tue Dec 21, 2004 7:48 pm
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Post subject:
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MachineSunday Rider Joined: 11 Nov 2004 Total posts: 47 |
I've had the wheels for years, got 'em from Fastline in Preston. Demand for TZR wheels was obviously a bit higher then 'cos i paid £140 for 'em. According to the receipt from Triple S here i collected them from powdercoating on 21.02.97 (£112 +vat). They're currently wrapped in bubble wrap 77 miles from here.
Might be interested in the spacers and whatnot if you'd want to sell 'em separately.
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Posted: Tue Dec 21, 2004 9:22 pm
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BOSOZOKURegular Racer Joined: 27 Jun 2004 Total posts: 477 Location: HIGH PEAK , DERBYSHIRE |
the spacers and stuff are not realy of very high quality ,but they do work if you PM me your email ill send you some piccies.lcless .PS are you in or around leed's/bradford area?
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Posted: Tue Dec 21, 2004 10:22 pm
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MachineSunday Rider Joined: 11 Nov 2004 Total posts: 47 |
I am unfortunately, lol. Why d'you ask?
Ooh look, i got a blue tuning fork logo under my name now.
Jesus christ. I've just clocked your profile. How you doing mate? Small bloody world!
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Posted: Wed Dec 22, 2004 12:09 am
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