Exhaust valve main shaft

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smuggler
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Exhaust valve main shaft

Post by smuggler »

How do you hold the main shaft when removing the 10mm nut on the gear on the left side of the engine? I subscribed to cyclepedia but it seems they skipped that step.
2001 KDX 220
2006 Polaris Sportsman 500 EFI
1996 Polaris XLT SKS
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canyncarvr
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Post by canyncarvr »

**edit**

Ooops...wrong shaft.

I don't recall there being a procedure listed for that.

If you force the LH gear against the subvalve rod, you will likely break a tooth off. That's happened before.

Hold the other end with either something soft-jawed..or use a hunk of leather for a pad?

Access the main rod through the access cover..hold it there?

Is the cylinder off?

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OLHILLBILLY
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Post by OLHILLBILLY »

Even the service manual doesn't say anything about how to hold onto the shaft. It just says "remove nut". :doh:
2004 KDX 200.. Coupla mods
2009 KX250F.. Track Star
2007 Hayabusa.. Street Madness
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smuggler
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Post by smuggler »

Yes cylinder is off. I looking at very lightly applying vise grips and a piece of rag to hold the gear. Will let you know how it goes.
2001 KDX 220
2006 Polaris Sportsman 500 EFI
1996 Polaris XLT SKS
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smuggler
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Post by smuggler »

Worked out ok with the vice grips and a rag wrapped around the gear.I am ready to fire it up again now, but I must read through this site to find the best break in procedure. Thanks CC. ...Oh by the way, the stock piston had several small cracks in the skirt..... guess I got lucky.
2001 KDX 220
2006 Polaris Sportsman 500 EFI
1996 Polaris XLT SKS
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canyncarvr
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Post by canyncarvr »

This is the second cracked skirt 220 in a few days...or maybe I just read your piston story twice.......

Anyway..another internet fairy tale debunked! Some do have the opinion that the only thing wrong with the 220 piston is that a bunch of internet boobs write bad things about it.

Good to hear you caught yours before it destroyed your bike!!

Best break-in. Oh my...another 'everybody has a story' story.


Be careful with it..and it will run like a three-legged dog until you do another top end. Warm it up..ride it like you stole it..and it will run better than any other 'gently' broke in 220!

This guy thinks so anyway.

Good Luck!

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Colorado Mike
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Post by Colorado Mike »

I love internet boobs.

:wink: :supz:
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'04 KDX220
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