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Dry clutch slip


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greggo
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Dry clutch slip

Mon Mar 24, 2014 8:48 am » Post: #1 » Download Post

Would you expect a little slip from your dry clutch if it has been disassembled for a while?

Not a very successful first outing on the new engine.

Got unpacked but too much for a single person to manage two bikes (I was riding my MV as well) because the twat faced monkey who was supposed to help me had his balls taken by his future wife and a mangina installed in it's place. A grown man being led by a child bride.

Not that I'm bitter.

Anyhoo.

Missed morning practice. Went out in qualifying, and before I could complete one lap I knew the jetting was off (it was running a bit flat in the top end) and it got red flagged due to a crash. Someone literally went from the pit exit and fell off at the first turn. At slow speed the slicks feel awful.


On my ride through the pits I noticed one of my chambers was oily. Nuts. Leaking gearbox fluid from an ill seated seal. So that was the end of qualifying.

For the first race on the NSR I was starting from last place on the grid, but on the outlap the clutch was slipping (it was the first time I'd been able to give it a proper fist full). Initially I thought it was my jetting change being too lean with the revs spiking and no real power. But worked out it was some clutch slip.

I took my place at the last spot and though i'll give it the welly on the first lap, it's the only way to find out if it is just plates and steels needing to bed in and take off any surface garbage from assembly. So when the lights went out that's what I did.

Straight into the back of Mr Muppet's 400 who's engine blew a head gasket on the line. He's quite famous for his hand grenade self built engines. I tried to swerve and it was a hard glancing blow. Hit him and found my front wheel pointing skywards. Brought that down to earth to find myself pointing at the tyre wall. Gathered myself up to find I'd no right footpeg. BAck to the pits to find a wrenched shoulder, dented calf, broken right footpeg (with bent brackets) and a dented chamber.

And so ended my 2 day race meeting before midday on Saturday as I was too sore to ride the MV. Thanks ass hat.

My questions are:
Should I have expected any clutch slip or do I need to investigate further?
And should my undies be this brown?>
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StephenRC45
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Mon Mar 24, 2014 9:09 am » Post: #2 » Download Post

When dry clutches go, they go.

Take it apart and have a look at the steels. We've fixed ones at trackday by de-glazing the steels.

Also on the dry clutches, in the steel pack, there is one thinner steel than all the others. This can be replaced with a "normal" thick one to increase the preload. We do this on all our trackday engines.
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Neal

 
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Mon Mar 24, 2014 12:36 pm » Post: #3 » Download Post

The things you need to check like previously said is the 1 extra thick steel plate needed . Look if there is any oil residue on the steels . You can blast the steels to revive them . Check that there is enough free play on the lever , when the clutch heats up things expand and it could be part of your issues .
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Suntum
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Mon Mar 24, 2014 1:59 pm » Post: #4 » Download Post

If your plates aren't knackered then it could be that little annoying seal on push rod thingy? Not sure what it is called in English
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nxrsr20

 
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Mon Mar 24, 2014 5:09 pm » Post: #5 » Download Post

and to answer the most important questions, yes change your underwear!

Did you clean your steels before re-assembly and it was done with clean hands/work surfaces?
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