GTS Steering Head Bearings
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Moderator
2010 Dragon Red GTS 300 Super, 2014 Piaggio Fly 150
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Tue Jun 10, 2008 2:20 pm quote
Created article GTS 250: Adjusting Steering Head Bearings

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Moderator
2010 Dragon Red GTS 300 Super, 2014 Piaggio Fly 150
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Posts: 16291
Location: Toronto, Canada, Fort Lauderdale, Florida
Tue Jun 10, 2008 2:22 pm quote
OK my first attempt to add an article. I'll try to put a link to it in the right place. I basically took Burgerbob's article and put the photos with the corresponding text.
Petty Tyrant
GTS250 GTS300 MP3 500
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Tue Jun 10, 2008 2:22 pm quote
Before putting a link, give it a suitable topic slug.
Petty Tyrant
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Tue Jun 10, 2008 2:23 pm quote
Oh, and btw: Gracias!
Moderator
2010 Dragon Red GTS 300 Super, 2014 Piaggio Fly 150
Joined: 11 Jul 2006
Posts: 16291
Location: Toronto, Canada, Fort Lauderdale, Florida
Tue Jun 10, 2008 2:24 pm quote
Did I make a poor slug, it was kinda long. Let me know if it was OK.
Petty Tyrant
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Tue Jun 10, 2008 2:28 pm quote
Benito wrote:
Did I make a poor slug, it was kinda long. Let me know if it was OK.
I spoke too soon: it looked like there was no slug at all, but that was due to a bug (just fixed it!) in the link at the bottom of the topic. It was using the generic link instead of the slug link. Strangely, the link at the TOP of the topic was fine. So the two didn't agree.

That said, I'd prefer short slugs where possible, especially for the most useful of the articles we have (which are what we're dealing with here). Eventually, the slugs are going to be based on the title and be automatic, and maybe we won't intervene much. For now, though, we have the luxury of creating shorthand versions.

Maybe wiki-steering-bearings would be a good, short slug.
Petty Tyrant
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Tue Jun 10, 2008 2:29 pm quote
Or, given the GTS nature, wiki-steering-bearings-gts.
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2010 Dragon Red GTS 300 Super, 2014 Piaggio Fly 150
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Location: Toronto, Canada, Fort Lauderdale, Florida
Tue Jun 10, 2008 2:30 pm quote
jess wrote:
Or, given the GTS nature, wiki-steering-bearings-gts.
Gotcha, it did seem a bit long and cumbersome. I'll update that and the link to it.
Petty Tyrant
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Tue Jun 10, 2008 2:33 pm quote
Excellent! That's definitely a good article to have in the library.
Petty Tyrant
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Wed Jun 11, 2008 8:40 pm quote
Changed name of article to GTS Steering Head Bearings. I don't believe this is any different for GT125 models.
Ossessionato
Joined: 04 Aug 2007
Posts: 2797
Location: Austin
Mon May 31, 2010 8:22 am quote
Hmm.. This could be added as an FYI, that if you feel "notches" or other inconsistency in the steering, it is most likely the lower bearings that have failed, as they are the ones bearing the weight of the chassis and rider. A good bit more work is necessary to change that bearing.
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Location: Pittsburgh, Pa.
Mon May 31, 2010 4:48 pm quote
drewteague wrote:
Hmm.. This could be added as an FYI, that if you feel "notches" or other inconsistency in the steering, it is most likely the lower bearings that have failed, as they are the ones bearing the weight of the chassis and rider. A good bit more work is necessary to change that bearing.
I added your FYI to the WIKI almost quoting you directly.
Now all we need is an article on how to to that.
(Something I know nothing about )
Ossessionato
Joined: 04 Aug 2007
Posts: 2797
Location: Austin
Wed Jun 02, 2010 8:19 am quote
Hmm.. It's a big job, definitely requires a lift and weird Piaggio special tools to extract the upper bearing race on the lower end of the tube. I wouldn't classify it as a DIY job, to be honest.
Ossessionato
Joined: 04 Aug 2007
Posts: 2797
Location: Austin
Wed Jun 02, 2010 8:27 am quote
Additionally, I just realized that Bob used a hammer and screwdriver to remove and install the steering nuts. They have specific torque specs that, if not followed, can lead to poor steering, or further damage to the bearings. I just serviced a bike with a bearing failure, and as I dismantled the shaft, realized that the damage had been caused by severe over-torquing of the two steering nuts at the top of the shaft. Not sure how we want to address this. It doesn't look like Motorsport or Jettin carries the appropriate deep socket castle tool. One could be machined by hand from a large deep socket, but it wouldn't be fun.
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Wed Jun 02, 2010 9:23 am quote
drewteague wrote:
Additionally, I just realized that Bob used a hammer and screwdriver to remove and install the steering nuts. They have specific torque specs that, if not followed, can lead to poor steering, or further damage to the bearings. I just serviced a bike with a bearing failure, and as I dismantled the shaft, realized that the damage had been caused by severe over-torquing of the two steering nuts at the top of the shaft. Not sure how we want to address this. It doesn't look like Motorsport or Jettin carries the appropriate deep socket castle tool. One could be machined by hand from a large deep socket, but it wouldn't be fun.
On many bikes (the X9 for one) the lower nut is torqued up to what amounts to no more than hand-tight, then backed off by 90 degrees before the upper nut is done up, then checked for free play. I've done loads with just a hammer and a drift quite successfully. Extracting the old outer races only means putting a slight bend at the end of a steel rod, and using a hammer. Inside bearing pullers aren't that expensive anyway.
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