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Author Topic: Possibly a blown countersahft bearing!?  (Read 401 times)

BalintHU

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Possibly a blown countersahft bearing!?
« on: September 09, 2018, 06:27:55 PM »

Yesterday i changed the oil and the filter, and after that i made a quick ride, then i spotted some oil at the drain plug. (Around it.) I cleaned it, then checked the plug, it was tight enough.

I thougt okay, nevermind maybe i just make it dirty while i drained my old oil.


Today after i rode it i checked it again, there was a very small amount there again, but now it wast from the plug, it MUST came from under the front sprocket cover. I toke it off, then i looked in the eye of my worst nightmare...  :( :-[ The gearposition sensor toke a shower in oil (4-5 drops) and with a flashlight i could see some oil at the countershaft, at the metal barrel * that you put under the sprocket.

* 31. number part there:
http://alkatresz.hyosung.hu/product.php?c=1098

If am i right i can chgange the 31,27,22 parts without dismantle the whole engine, right ?
//If i have to dismantle the whole engine, i will get a better rersult if i get a spare engine right ? (Used 250cc Hyos cost ~1000-1255$$ there.)


Any idea what to look for? I cant imagine any other part that can result in a oil leak at this place.
The bike doesnt have any strange sound while riding. (Besides the annoying spark noise... i could fix it with a new set of Denso spark plug, she doesnt like the NGK ones....)

She only drops some oil when i ride her, i toke 2 white A4 sheets of paper under her for night, and the papers were totally clean,  there wasnt oil on them.


And yes, the sprocket's nut is enough tight.



I get a "gift" from this bike almost in every month. :(
I will finish school at the end of this school year, maybe it will be better to look after a 600CC K4-6 GSXR. :(   
« Last Edit: September 09, 2018, 06:32:03 PM by BalintHU »
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umop-ǝpisdn

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Re: Possibly a blown countersahft bearing!?
« Reply #1 on: September 10, 2018, 12:03:26 AM »

Are you sure it is not just the oil seal? Part 27. You can replace that without much trouble.
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spit051261

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Re: Possibly a blown countersahft bearing!?
« Reply #2 on: September 10, 2018, 01:33:28 AM »

Have you tried changing the 'O' ring on the gear position sender just in case it's coming through there and that is easy to change ?
Also , how tight is your chain because you need about 25mm play in the the chain and if it's too tight , big problems with bearings and things  :o
You really don't want a tight chain .
« Last Edit: September 10, 2018, 01:35:04 AM by spit051261 »
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umop-ǝpisdn

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Re: Possibly a blown countersahft bearing!?
« Reply #3 on: September 10, 2018, 04:06:07 AM »

The tight chain warning is legit. This is how I had trouble with my bike.
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BalintHU

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Re: Possibly a blown countersahft bearing!?
« Reply #4 on: September 10, 2018, 05:55:28 AM »

Thanks the help guys, Im hoping ofcourse  this is just a sealing problem, but I dont believe in fairies...

Nah, I've made the decision at night what ever the situation is with the bike Im going to fix her. First real love, almost the Best everyday small bike I've ever ridden.
I've already ordered the seals... Finger crossed. (Tightest chain slack was 27mm - 30mm, now (this year) I let 35-40mm... Soo Im hoping!!!)

The position sensor, good idea I didn't checked if there is an o ring, I will thanks!

A blown bearing shouldn't have a strange noise while the bike is accelerating or deaccceleratig? She doesn't have strange noise, beside the headache maker backfiring when u shifting down. (Like it. Neighbors doesn't. ;D ;D )

I will let you know if anything is updated.
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spit051261

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Re: Possibly a blown countersahft bearing!?
« Reply #5 on: September 10, 2018, 07:42:58 AM »


 backfiring when u shifting down. (Like it. Neighbors doesn't. ;D ;D )

Like everyone's bike unless they have fitted the AIS kit  8)
Here ya go  ;)
http://koreanbikeparts.com/index.php/genuine-gear-position-switch-o-ring-hyosung-models.html
« Last Edit: September 10, 2018, 07:44:55 AM by spit051261 »
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BalintHU

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Re: Possibly a blown countersahft bearing!?
« Reply #6 on: September 10, 2018, 10:16:28 AM »

Thanks! I hope soo much that little crappy rubber stuff will fix the leak.
Finger crossed. ;D
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spit051261

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Re: Possibly a blown countersahft bearing!?
« Reply #7 on: September 10, 2018, 02:43:48 PM »

Have you removed your chain and sprocket already ?
Just thought you could see if there was any play in the shaft .
If the bearing is fooked , you should see plenty of movement .
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BalintHU

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Re: Possibly a blown countersahft bearing!?
« Reply #8 on: September 11, 2018, 05:55:49 AM »

The shaft zero movement in vertical or horizontal (only from in and out 1-1,5mm but that"s normally as my  friend checked... He works in a bike repair shop.) He told me don't worry it should be the seal. He rode it and said the bike is well better than he expected, the 53k km should be real. (The validity of the tachometer's info's are a pain in the neck at Hungary.... Soo many seller turn it over with a drill to be able to ask for higher price for the bike...)


 ;D Soo I've ordered some O rings, and the seal then I went for a ride with her. ;D ;D  8)

It looks like I'm a bit paranoid, I always thinking about the worst scenario. :( :)
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spit051261

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Re: Possibly a blown countersahft bearing!?
« Reply #9 on: September 11, 2018, 06:08:02 AM »

Code: [Select]
From my time with them , the engine ,gearbox and the rest of the running gear seem fine.
It's mainly electrical gremlins that cause issues but even these are easy to fix .
Just enjoy the bike .
« Last Edit: September 11, 2018, 06:12:02 AM by spit051261 »
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