EVO All Evo Model Discussion

Transmission Issue

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Old Sep 19, 2021 | 07:54 AM
  #11  
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Originally Posted by PeterB
^^^ +1 on this. You have to replace the belt and you have to pull the primary and clutch to do that so you can inspect all that along the way.
Agreed. After sleeping on it, my first thought this morning was it seems more like a primary issue. I admit I have no experience deep diving into the guts of these power plants. But that doesn't scare me. I am mechanically inclined and have the means to figure this out. Time will be the main factor.
 
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Old Sep 19, 2021 | 10:27 AM
  #12  
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That's it, right there.

Work from the outside in, and eventually you'll find the problem.

Good news, so to speak anyway, in your case is the sounds it is making probably mean that the root problem will be obvious once you get in deep enough.
 
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Old Sep 19, 2021 | 02:49 PM
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This is one of those things you won't know till its apart.
The idea of getting the primary, clutch and front pulley apart are good First steps

WP
 
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Old Mar 27, 2022 | 03:24 PM
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Originally Posted by 0maha
That's it, right there.

Work from the outside in, and eventually you'll find the problem.

Good news, so to speak anyway, in your case is the sounds it is making probably mean that the root problem will be obvious once you get in deep enough.
Deep Enough? That's the truth. So I have somewhat of an update. It's taken all winter, as time would allow I've been digging deeper. Finally got the primary apart, clutch out, and plates measured. The friction plate assy (8 plates together) come in at 0.706. leaving 0.045 to wear yet. They seem fine? Service level recommends replacement at 0.661.

So onward I go. Next is to open up the transmission. To get to this point I basically just followed the procedure to replace the belt. Only reason I am saying this is I cannot believe they designed these in a way that the swing arm has to come off to do that. Really? LoL.

I have already purchased the belt and primary gasket set. Over $300 into parts n tool needed to get to this point. Kinda spendy and not even at root cause. But have already done some research on either replacing trans or rebuilding.

Ave ebay used trans is $500+, and lowest mileage trans found this far is about 60k mi. Doesn't seem like a fair trade for my time. I'll either get a full gear or shifter set, or find and fix only what needs fixin. Will eval at the reveal of the diagnosed issue. Wish me luck!
 
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Old Mar 27, 2022 | 05:36 PM
  #15  
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Originally Posted by DeputyLoud
I cannot believe they designed these in a way that the swing arm has to come off to do that. Really? LoL.
How else would you design it considering that the front sprocket is in front of the pivot of the swingarm?

Well, you could just cut the belt...

Don`t be in a hurry to buy a transmission, you don`t know what your gearset and shifting components look like yet.

Inspect the splines in the transmission sprocket and on the main drive gear.
 

Last edited by Dan89FLSTC; Mar 27, 2022 at 06:10 PM.
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Old Mar 27, 2022 | 05:40 PM
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I have to ask, how's the front output pulley? Wouldn't be the first one that's spun the teeth out of the center.
 
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Old Mar 27, 2022 | 07:42 PM
  #17  
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Originally Posted by Dan89FLSTC
How else would you design it considering that the front sprocket is in front of the pivot of the swingarm?

Well, you could just cut the belt...

Don`t be in a hurry to buy a transmission, you don`t know what your gearset and shifting components look like yet.

Inspect the splines in the transmission sprocket and on the main drive gear.
I also have a metric (Kawi Vulcan) and have replaced both front and rear pulleys and had the belt off numerous time trying dif configs. Its a cpl hr job at most. Was just an observation.

And I'm in no hurry to overspend needlessly. Although a man can dream. I always do my due diligence and try to decipher the dif between wants and needs.

This trans always had an intermittent issue with a false neutral between 4th n 5th. I've only put 20k mi on this bike myself. Wanna say bike has about 52k mi on it? Any thoughts on something that would get in the way of all gears not fully engaging?

Primary oil was clean and normal with no metal to be seen. Inspections of everything in there looked good so far.

Fully expecting the opposite when I drain the trans. To revisit clutch acted normally but all gears were grinding. Seemed to disengage and then engage and grab (with clutch released). That action was violent enough to shred teeth off the belt in the lower gears. Then with teeth missing that added to what felt like slippage. I admit I drove it home like that on the hwy mostly instead of being stranded on side of the road in the dark with the wife. Figured damage was done already. It was the end of a long day on the road and there were no real signs of failure until just before. It slipped out of 4th on it's own in-between upshifting.
 
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Old Mar 27, 2022 | 07:48 PM
  #18  
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Originally Posted by brakeless
I have to ask, how's the front output pulley? Wouldn't be the first one that's spun the teeth out of the center.
Nothing jumped out at me with the front pulley. It's still in place. Suppose I should pull that for further inspection, before cracking open the trans.
 
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Old Mar 27, 2022 | 07:53 PM
  #19  
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Originally Posted by DeputyLoud
I also have a metric (Kawi Vulcan) and have replaced both front and rear pulleys and had the belt off numerous time trying dif configs. Its a cpl hr job at most. Was just an observation.

And I'm in no hurry to overspend needlessly. Although a man can dream. I always do my due diligence and try to decipher the dif between wants and needs.

This trans always had an intermittent issue with a false neutral between 4th n 5th. I've only put 20k mi on this bike myself. Wanna say bike has about 52k mi on it? Any thoughts on something that would get in the way of all gears not fully engaging?

Primary oil was clean and normal with no metal to be seen. Inspections of everything in there looked good so far.

Fully expecting the opposite when I drain the trans. To revisit clutch acted normally but all gears were grinding. Seemed to disengage and then engage and grab (with clutch released). That action was violent enough to shred teeth off the belt in the lower gears. Then with teeth missing that added to what felt like slippage. I admit I drove it home like that on the hwy mostly instead of being stranded on side of the road in the dark with the wife. Figured damage was done already. It was the end of a long day on the road and there were no real signs of failure until just before. It slipped out of 4th on it's own in-between upshifting.
On the topic of the sway bar removal and the bike yr/mileage. I've never pulled one. What is recommended to be serviced while that is out? (ie...bushing replacements ect). Preferred brands? I usually try to stick with oem parts when affordable. Unless aftermarket is obviously a better choice.
 
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Old Mar 27, 2022 | 08:13 PM
  #20  
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If your transmission is that torn up, I'd just pop the top and have a look see. I would think it would be obvious. Never known one to act that way. Keep us posted on what you find.
 
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