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  Topic Review (Newest First)
May 11th, 2019 9:01 pm
WED Thank you so much. I am heading to Arizona the long way round then Reno and home to Victoria BC in 3 weeks. Its a 5000 mile run and this post makes my day. I own an 03 Senna ST4s and love the machine. I know it and ride it hard and she takes care of me out there. A shop is milling the spacer and I'll get it Monday, install and ride. Thanks again man.
May 11th, 2019 4:04 pm
grimah1w @WED -- I received your PM but your settings are such that they deny you receiving PMs so I could not reply. so posting...

So far the spacer seems to have done its job well. Here is a photo of it in place, taken the other day...this is about 1-1/2 years after I first installed it, about 5,000 miles ago. Would have loved to taken it to ECMX but I got slammed with work and could not break away this past week. Sounds like it was a good time.


Spacer Today



Spacer at install, Dec 2017

May 6th, 2019 2:30 pm
WED Did the doner sprocket spacer work out for you in the long run?
I am about to do this to mine; same issue, and leaving on a long tour SouthWest. Should I be worried
Dec 20th, 2017 1:06 pm
Desmo_Demon Unfortunately, I had a stator issue and then another stator issue with the new stator and then everything else in life happening, and I only got about 5000 miles on the set-up before I quit riding. One of these days I will have to pull the bikes out of being moth-balled, get them running, again, and start riding.



Quote:
Originally Posted by grimah1w View Post
Thanks Desmo_Demon, hoping the same! Good to see you posting again. Thanks again for sharing your ideas! The sprocket spacer seems sound! Did you ever notice any other side effects?
Thumbs up!
.
Dec 20th, 2017 5:21 am
grimah1w Thanks Desmo_Demon, hoping the same! Good to see you posting again. Thanks again for sharing your ideas! The sprocket spacer seems sound! Did you ever notice any other side effects?
Thumbs up!
.
Dec 20th, 2017 1:28 am
Desmo_Demon
Quote:
Originally Posted by Dan Q View Post
Since my link reference probably was confusing, here is the article. By the way, bchatt, your solution looks like Desmo_Demon's first solution, that didn't hold up for long. Keep an eye on it.

See the copy of magazine article written (page 19) by him detailing the whole idea of using a sprocket to work around a buggered up countershaft spline.
http://www.usdesmo.com/leanings/Lean...1_1_Spring.pdf
Quote:
Originally Posted by grimah1w View Post
Having paid attention this thread and having recently encountered the dreaded output shaft wear, I am adding an update to the thread and how I followed Desmo_Demon's posted solution in "Leanings"
Geeze...I forgot I even wrote that article. I am glad to see that some of my goofy ideas and trails and tribulations have helped others. I hope the new arrangement treats you well for many, many miles with no negative effects.
Dec 16th, 2017 8:50 am
Yorik
Quote:
Originally Posted by dewcatty View Post
You guys got me worried so I had a look at my ST3 but found it has a great big nut with a locking tab to hold the front sprocket so there must be a thread on the spline? Anyway it doesn't look to slide at all on the spline. Is it a better system than on the ST4?
Quote:
Originally Posted by mlukason View Post
I've never had a problem with mine. So I'll say "yes" our system is a better design. (but I'll say it quietly) I sure you can mess up our system too...like strip out the shaft or something.
The ST3 system is better. Period. The Japanese got it right 30 years ago.

A little OT, but some ST3's came with the wrong width spacer from the factory (mine included) and it misaligned the chain enough so that it wore into the side of the front sprocket. I've got an ugly picture around here to prove it. I'm pretty sure it was Brad that wrote about it on his website.
Dec 16th, 2017 8:25 am
mlukason
Quote:
Originally Posted by dewcatty View Post
You guys got me worried so I had a look at my ST3 but found it has a great big nut with a locking tab to hold the front sprocket so there must be a thread on the spline? Anyway it doesn't look to slide at all on the spline. Is it a better system than on the ST4?
I've never had a problem with mine. So I'll say "yes" our system is a better design. (but I'll say it quietly) I sure you can mess up our system too...like strip out the shaft or something.
Dec 16th, 2017 4:48 am
dewcatty You guys got me worried so I had a look at my ST3 but found it has a great big nut with a locking tab to hold the front sprocket so there must be a thread on the spline? Anyway it doesn't look to slide at all on the spline. Is it a better system than on the ST4?
Dec 14th, 2017 3:57 pm
Dan Q Perfect summary! Thanks for the pics.

I'd add another possible cause. I think retention plate wear adds to the problem. So, I recommend to check the plate for wear and replace. They're cheap.
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