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Cold engine, clutch slip?


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wookee

Good morning,. I was just curious of others are experiencing this problem.  When I take off on the bike for the 1st time of the day, the clutch slips and makes a bit if a clattering sound.  Even if I warm the bike up, the 1st take off does this.  I'm assuming the plates are cold, but is this anything I need to be concerned about?  🍻

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Colddog

It wasn't me, but i read on another forum that a fella was having this issue too.  He said that he would give his clutch lever 2 squeezes before kicking it in gear to pull away smoothly.  If just squeezing the clutch and then kicking it in gear, it would chatter first time out for the day, but good after.  He said the cycling of the clutch lever seemed to make everything work.  I haven't run into this myself, but if it helps......!

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Ol'crazy

The same thing happens to me from the first day. And it has 10,000 km and three oil changes (both semi and full synthetic) and remains the same.
And it doesn't depend on the ambient temperature either. The same thing happens with 25ºC as with 5ºC. It's annoying, but I've read that it's common on XTs.
What I usually do the first time I use the motorcycle in the day is to release the clutch by accelerating and using the brake at the same time, so that that first skid occurs with the motorcycle stopped.

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Stevoh

Not sure if this info helps, but I did read somewhere that using full synthetic oil that is overspec can result in clutch slippage. I've just changed my oils to such, so far no clutch issues.

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Vtamb81

This happens to me too, glad to know it’s not just me! First time I take off for the day and then never happens again. Happens at the start of every ride. 
 

3000 miles. 3 oil changes (2x regular during breakin and semi-syn oil since 600 miles). 
 

I’ll try the cycling the clutch lever trick. 

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Stevoh

Found this reply on an mt 07 forum.

 


sdrio do you have an update to your problem? How did it go longer term? Has the issue come back? I am having that same problem. I think...

 

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gone2seed

Like a duck with a dry clutch

     sorry

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Firebolter
5 hours ago, gone2seed said:

Like a duck with a dry clutch

     sorry

Yup! 

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qInvention

I have exactly the same problem.

It doesn't occur at every first start-up of the day. 

I can't really determine what the conditions have to be like so that it occurs. 

Strange.

 

But to try the lever cycling trick is a perfect reason to get the bike out event hough it's snowing ! 🤣

Edited by qInvention
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Matth
On 1/6/2021 at 6:50 AM, Johnnyboxer said:

When cold I don’t start my bike unless it’s in first gear 

I pull clutch in and press the starter & get a slight lurch 

I suspect the clutch has a fair bit of drag 

Me to, jump on it with engine off select gear and pull clutch in and rock the bike a bit , this releases the clutch then i start with clutch lever in, i do this to avoid the clunk on cold start up.

i heard that the original running in oil has to have at least a few hundred miles to bed everything in and using synthetic too early isn’t great.

i changed mine to synthetic after 500 miles and is ok.

i do this on every bike i e owned as want to avoid the heavier clunk in gear as the friction plates are partially stuck together, when warm its less of a clunk :))) too much mechanical sympathy!

Edited by Matth
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Hogan

Nope. Mine works perfectly 🙂

 

Food for thought:

1. Is your clutch adjusted correctly. If you adjust it too tight when the engine is hot, then when the engine is cool it will slip & chatter until it heats up and the cable loosens. Make sure there is some free play when the bike is cold.

2. What oil are you using? Correct grade? I would avoid fancy oils and just stick with basic mineral or synthetic oils. Many 'racing' oils will favor performance over rideability and even longevity. Cold engine clutch issues will be considered an acceptable trade off as these kind of oils aren't intended to be used on street bikes.

 

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wookee
12 hours ago, Hogan said:

 

2. What oil are you using? Correct grade? I would avoid fancy oils and just stick with basic mineral or synthetic oils. Many 'racing' oils will favor performance over rideability and even longevity. Cold engine clutch issues will be considered an acceptable trade off as these kind of oils aren't intended to be used on street bikes.

 

I think you are probably on to something with this theory. I was running Castrol 10-50 full syn after 600 mi. Changed again to Mobil 1 10-40 full syn at 1800mi and just did the 4000 mi service with Valvoline 10-40 full syn.  All oils were above spec and might be too slick for the clutch. My old KLR650 had this problem, so that's definitely a possibility. If I wasn't saving money for a full suspension upgrade, I'd probably use the excuse for a Recluse slipper clutch.  

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Ol'crazy

In my case I have had the same "problem" both with the Yamalube semi-synthetic from the first oil change, and with the Motul 7100 full synthetic that I have already used several times since then.

 

The next step I am going to take is to disassemble the clutch discs, check and grease them well and check if any difference is noticed. I will comment here on the result.

 

Edit: Motul 7100 10W40 full synthetic (


7100 4T 10W-40 - Motul

)

Edited by Ol'crazy
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Canzvt

My guess (as I haven't taken the clutch cover off or clutch apart) is a sticking fiber (s). I've run Shell Rotella T, 15W40 non synthetic on all my bikes (including my MT10, except my WR and YZF) for as long as I can remember, and this is the first bike to 'grab' on first application when cold. Apparently it is common to the CP2 engine. Would like to find a cure, but not overly worried about it.

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I think I have Yamaha disease...

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  • 1 month later...
Baja t7

Same issue WTF . I’ve had 30 or so bikes I my life and never had this issue . 1600 miles and still has the yamalube the dealership put in ( bought it used previous owner had the 6oo mile service done ) so don’t think it’s an oil thing . 
kind of alarming , feels like the dam sprocket  is stripped or something. 
anyone take bike back and ask about this ? 

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