XH Motorcycles Forum
Motorcycle Resource Forums => Technical Resource Discussion => Topic started by: 5eh on August 24, 2015, 04:49:48 PM
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Hi everybody, i'm new for this site. I own #1700, bought new and been riding about 8000 miles. I ask if there are informations about which VIN numbers really need a transmission rebrushing. I don't really want to risk a transmission lock but I don't want either dismount and rebrush if it's not really necessary.
Really thanx for any advice.
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Welcome 5eh
There are no specified vins to tell us which of our bikes is going to have a problem with their transmission. Early Xs are just as prone to any issues regarding transmissions as to later ones... It just doesnt matter.
Now maybe we could break it down to monday builds or friday builds?? .... Not likely, as the trannys were vendor built..... Not built by excelsior henderson.
Side note.... Our trannys were built by the same vendor as the yamaha Vmax and Venture. Our tranny parts are suppose to be able interchange with those bikes. With 5th gear being the exception...
I cannot express enough the importance of getting that tranny rebushed as soon as possible, as it is a safety issue. That tranny goes it wiil completely lock up, at what ever speed you are going..... And the clutch is not going to release it. All very scary if you survive...
Bruce
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Yup, everything Bruce just said. I am just now tearing into 1525. She has 5K miles on her and the transmission came out last night. I figured I would wiggle the gears around and if all was snug, I'd put it back together and forget it. Well, they weren't and I didn't.
The two gears I measured just for grins, had 0.004" clearance and the other was 0.006" clearance. According to Machinery's Handbook, a bearing in that size, with a constant supply of oil, should only be about 0.001-0.002". And mine weren't wobbling that badly.
It really is amazing that the vendor couldn't hit the tolerances closer than that. The shafts are precision ground--a technology where they regularly maintain tenths of a thousandth tolerance in production. The gear bushings are probably reamed to size--again--a very well known, precise process. The vendor should have done better than this.
Even if the transmission doesn't lock up, sloppy clearances mean that the gears won't contact on their designed pitch contact circle. That will cause premature wear on the gear faces.
When I'm done with this one, I will probably tear into my other one and do it as well. Id rather ride than wrench but, when they need it, they need it.
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Thak you all for answering, it seems like I ran out 8 of my 9 lives....
The first problem I meet when I try to dismount the cassette is the puller (part number 6999-0028A).
Someone knows the thread? Kent Moore site seems not to work any more and that since a couple of months at least.
Is there any (quite) detailed advice online about rebrushing?
Luca
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5EH,
If you are referring to the puller required to remove the alternator rotor, I use an air conditioning compressor tool that happens to be the same thread. The only drawback was that it was slightly too short. I added a washer of the correct diameter and it works just fine. Your bigger issue will be coming up with a tool to remove the torsional compensator with. I had to make one up from a spanner wrench.
Mike
#741 #901
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When I pulled my trans cassette last fall and sent it to Atlantic EH in VA for their update work they offered to loan the special tools to me. Call Marty and ask.