One-way bearing again? - Yamaha Grizzly ATV Forum
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post #1 of 9 Old 04-02-2012, 02:37 PM Thread Starter
 
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One-way bearing again?

My one-way bearing started making noise again this weekend. First a little history on my bike. It had 1000 rpm stall spring installed when I got it. I replaced the one-way but left the stall springs.

Approximately 150 miles later the one-way was making noise again. I did some reading and figured out that stall springs are hard on the one-way. The one-way takes over at the higher RPM when the stall springs release upon deceleration. So I replaced the one way and took out the stall springs.

Now 250 miles later the one-way is going out again. Is it possible that either the end of the crankshaft or the wet-clutch housing surfaces that one-way rides on/contacts are also worn? The wet-clutch housing is $175 on partshark so it's feasible to replace. Splitting the cases and replacing my 5mm stroker crank at this point in time is not. Any other suggestions?

09 Griz 700(815cc) - Black, 25in Buzzsaws/30in Zillas, Uni filter, 47mm bored throttle body, custom machined primary, 1.5mm shim, 18g greaseless overdrive weights, Fox Podium Shocks, Modified RDC 2in lift, Warn RT25, 2in snorkels

06 Kodiak 450 - Green, stock rhino tires, uni, modded stock exhaust, machined clutch, 1mm shim, 500rpm wet springs and 4-660 weights

06 YFZ 450 - White, Uni, pro flo intake, hmf pipe, ITP holeshots, 36 tooth rear sprocket
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post #2 of 9 Old 04-02-2012, 02:59 PM
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dont use an impact is what i've learned with these one way bearings.. don't know if you have been or not. i agree that the 1000 stalls may have been causing added work for the one way but also that 5mm stroke could be taking its toll as well.. the way you have your bike set up is just hard on the clutch components i believe,,
 
post #3 of 9 Old 04-03-2012, 12:43 AM
 
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I also think the machined sheaves and shims place extra wear on the one way.

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post #4 of 9 Old 04-05-2012, 09:39 AM Thread Starter
 
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Any other ideas? Going to tear into it this weekend.

09 Griz 700(815cc) - Black, 25in Buzzsaws/30in Zillas, Uni filter, 47mm bored throttle body, custom machined primary, 1.5mm shim, 18g greaseless overdrive weights, Fox Podium Shocks, Modified RDC 2in lift, Warn RT25, 2in snorkels

06 Kodiak 450 - Green, stock rhino tires, uni, modded stock exhaust, machined clutch, 1mm shim, 500rpm wet springs and 4-660 weights

06 YFZ 450 - White, Uni, pro flo intake, hmf pipe, ITP holeshots, 36 tooth rear sprocket
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post #5 of 9 Old 04-05-2012, 10:14 AM
 
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If you have stock wet clutch springs now I would say the surface the one way grabs is worn out causing the new bearings to go so quick.

My 660 with 7000+ kms on it was slightly worn where the one way rides. My last ride the one way would give out every now and then at very slow speed on deceleration.
I just did 500 rpm stalls and a new one way, I'm sure this is the first time the one way was ever replaced.

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post #6 of 9 Old 04-10-2012, 10:42 AM Thread Starter
 
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Update: Had a chance to tear into my clutch this weekend and found out why it was eating up one-way bearings so fast. Needle bearing was out that keeps the shaft straight that the one-way bearing rides on. Part #8 in the clutch diagram (part number: 93315-21813-00). No idea how this bearing would fail but it did and was allowing the wet clutch housing to wobble and get out of alignment with the engine crankshaft. New needle bearing and one-way bearing on order and will post up results after the ride this weekend.

09 Griz 700(815cc) - Black, 25in Buzzsaws/30in Zillas, Uni filter, 47mm bored throttle body, custom machined primary, 1.5mm shim, 18g greaseless overdrive weights, Fox Podium Shocks, Modified RDC 2in lift, Warn RT25, 2in snorkels

06 Kodiak 450 - Green, stock rhino tires, uni, modded stock exhaust, machined clutch, 1mm shim, 500rpm wet springs and 4-660 weights

06 YFZ 450 - White, Uni, pro flo intake, hmf pipe, ITP holeshots, 36 tooth rear sprocket
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post #7 of 9 Old 04-10-2012, 09:22 PM
 
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quick question what kind of oil are you running in your bike I was running thru one-way bearings like crazy. make sure you are using a atv specific oil any time ive put regular 10w-40 oil in mine i was replacing my one way bearing in no time.

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post #8 of 9 Old 04-11-2012, 09:49 AM Thread Starter
 
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Amsoil 0w-40 ATV oil. Wet clutch still looks great after 2000 miles so I'm sure that's not it. My 814cc big bore stroker motor and 3.2 starting ratio machined clutch I'm sure are hard on it.

09 Griz 700(815cc) - Black, 25in Buzzsaws/30in Zillas, Uni filter, 47mm bored throttle body, custom machined primary, 1.5mm shim, 18g greaseless overdrive weights, Fox Podium Shocks, Modified RDC 2in lift, Warn RT25, 2in snorkels

06 Kodiak 450 - Green, stock rhino tires, uni, modded stock exhaust, machined clutch, 1mm shim, 500rpm wet springs and 4-660 weights

06 YFZ 450 - White, Uni, pro flo intake, hmf pipe, ITP holeshots, 36 tooth rear sprocket
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post #9 of 9 Old 04-13-2012, 08:50 AM Thread Starter
 
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Update 2

Update 2: Parts came in yesterday and had a chance to put it back together. Everything is working fine. Before when I shut the engine off there was a "clatter" noise coming from the clutch area. I believe this was because of the bad bearing allowing the wet-clutch housing to contact the one-way bearing as the engine slowed to a stop. Only parts I replaced were the bearing I mentioned above and the one-way.

Anytime you need to replace your one-way bearing you should inspect the idler bearing on the wet-clutch housing. If the idler starts to go out it will increase wear on the one-way. The bearing is in a blind hole which makes it a pain to change out and also contributes to early failure as it doesn't get much oil there. In the future I'm going to just replace it anytime I replace the one-way as an extra $12 is cheap insurance if I don't have to go back in a replace the one-way again because the idler bearing failed.

09 Griz 700(815cc) - Black, 25in Buzzsaws/30in Zillas, Uni filter, 47mm bored throttle body, custom machined primary, 1.5mm shim, 18g greaseless overdrive weights, Fox Podium Shocks, Modified RDC 2in lift, Warn RT25, 2in snorkels

06 Kodiak 450 - Green, stock rhino tires, uni, modded stock exhaust, machined clutch, 1mm shim, 500rpm wet springs and 4-660 weights

06 YFZ 450 - White, Uni, pro flo intake, hmf pipe, ITP holeshots, 36 tooth rear sprocket
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