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Old 07-05-2007, 02:24 AM   #901
atgreg
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Calling Jim Rowley

G'day Jim,

I had a serious flirt with buying a HP2 this week, I decided i couldn't part with the AT, so the old girls got to get tarted up a bit, she really needs a decent front end. As mentioned previously Ive got a KTM front end, 50mm whitepower extremes. It's looking like they will be a nightmare to fit, needs a new steering stem and the steering stops etc are all in the wrong place, really a complete set of custom clamps would be the go, I cant do the work myself , I'll have to pay someone to modify it for me. So I was wondering how hard it was to fit the CR front end to your bike ?? Being in the honda family was it a hard or reasonably easy fit ???

thanks
Greg
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Old 07-06-2007, 05:08 PM   #902
vor-werk
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Hi Greg,

the problem is, that the german prices (@african queens) include 19% value tax and the prices at boano's site doesn't include any italien value tax, so it seems to be cheaper but it does not.

Cheers,
Tim
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Old 07-07-2007, 05:58 AM   #903
atgreg
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Well seeing Im keeping my AT, she's going to get some attention. The old girl really needs a decent front end. I'd like more travel to match the longer custom ohlins shock and some better quality forks than the standard damper rod jobbies and also be adjustable.

Ive got a front end of a 99 KTM Rallye, 50mm whitepower extremes. After doing some measuring the KTM steering stem is a lot bigger than the Honda and there are no bearings to match them up. At the least it's going to require a new stem machined up and fitted to the clamps. The KTM clamps also have milled out areas where the bearings sit and the Honda clamps are flat, maybe I'll have to have some spacers made up to fit into the milled areas, also the steering stops are all in the wrong places. Qbviously its not going to be easy, ive thought maybe some custom clamps might be the go, ive been quoted $900 , yikes,

Another option is to fit some XR600 forks, they are cartridge forks and are adjustable, they are also the same diameter as the AT fork, 43mm so they would slip straight into the AT clamps and I'd only have to sort out spacers and brakes. Im not sure that longer forks in 43mm would be strong enough for the AT's weight, again any thoughts ??

Any thoughts or ideas would be appreciated

greg
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Old 07-07-2007, 06:24 AM   #904
Jeff@TheQuadShop
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XR600 forks work great in AT's and TA's but you will need to respring and revalve them if you are an aggressive rider.



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Old 07-07-2007, 06:41 AM   #905
atgreg
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Quote:
Originally Posted by Jeff@TheQuadShop
XR600 forks work great in AT's and TA's but you will need to respring and revalve them if you are an aggressive rider.
G'day Jeff, yeah springing & valveing goes without saying, I'd really like to use the extremes as they are a great fork and really beefy but its going to be a big job to fit them and I cant do any engineering stuff myself so it could get expensive. The AT's quite a bit heavier than the TA so Im not sure about the longer foks flexing too much. One thing I thought of was to drop 10-20mm travel from the XR forks to give em more overlap, this would make them 260-270mm travel, still a good improvement on the 220mm of the AT. Or if I used XR600 clamps as well I could maybe fit an SRC fork brace for them. We'll see, when Jim gets back on line it will be good to hear how hard the CR USD forks were to fit
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Old 07-07-2007, 06:57 AM   #906
Jim Rowley
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Good morning Greg and Jeff

The CR forks were not hard to install at all. The lower bearings have the same outer race size, AT's being caged ball bearings and CR's being tapered rollers. I had to turn down the top of the steering stem because the AT has a smaller bearing. I matched up another taper roller bearing and had new threads cut on the stem using the stock AT nut. I don't remember if I made a spacer between the bearing nut and the top triple clamp. Things get fuzzy as I have done this conversion on several bikes. But I got this one done and have put a few miles on it and like it alot. Here's a pic.



Jim.
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Old 07-07-2007, 07:13 AM   #907
Jeff@TheQuadShop
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Hey Jim, a little off topic here but.... I'm coming through on the TAT in a couple weeks and I want to run the Rainbow trail on the way. Have you ever rode this trail before?
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Old 07-07-2007, 07:19 AM   #908
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I haven't. But a couple of friends have. I don't remember if it was still closed from snow or not. Check in the regional rockies forum. Someone there should be able to help you out. If not, I'll go scout it out for you... on my KDX, not my AT.

Jim.
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Old 07-07-2007, 07:22 AM   #909
Jeff@TheQuadShop
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You want to meet up and ride it with me? I should be coming through around mid week the first week in august.
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Old 07-07-2007, 10:04 AM   #910
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Yeah, I might. All depends on my schedule at that point.
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Old 07-07-2007, 11:35 PM   #911
atgreg
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Thanks Jim, a couple more questions;

What year model forks did you use ??, any ideas if CR250 forks + clamps are the same ??, ive found a 92 CR250 front end for a reasonable price.

Did you use the CR front wheel or the AT ?. What did you do for brakes ??

What did you do for springs and valveing for the AT's weight ??

thanks
Greg
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Old 07-08-2007, 08:25 AM   #912
Jim Rowley
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91 CR forks had some internal problems in terms of anodizing. They were not coated so had premature wear issues. 92 on should be okay and they are pretty much the same up until the early CRF series. I used aftermarket clamps made for the CR and I don't remember the year of forks I used.

I bought a new Excel wheel as the stock one was pretty used up. The brake kit is one of my own but any supermoto setup for CR's should work.

Springs are .5 Kg rate. That's all I know. I gave our local suspension guru the forks and he did his magic. The forks were ment for my GS but they work great on the AT too. I knew there was a reason why I went with CR front ends on my bikes. I have an extra set I was going to put on my VTR1000 Superhawk but I had to draw the line somewhere.

Jim.
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Old 07-08-2007, 10:29 PM   #913
atgreg
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Thanks Jim
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Old 07-09-2007, 12:20 AM   #914
atgreg
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Quote:
Originally Posted by vor-werk
now I'm looking for a another RD04 to rebuilt Eddy Hau's bike:
Hey Tim,

any ideas what forks were used on the AT marathons & NXR750's ???
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Old 07-09-2007, 03:56 AM   #915
Tim
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Sorry, no idea but I'm sure a bit of 'net searching would tell you. Suggest you try Jenna on XRV.org she seems to know all there is to know about the Dakar bikes.
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