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04 raptor 660. 686 big bore with open airbox/k&n. Big guns slip on exhaust
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Discussion Starter · #1 ·
As stated working on a 04 dvx400. Total top end rebuild with new valves and I got the dual overhead cams timed right but when I check the valve clearance it's off. Have never really dealt with shims before, just tappet arms. I measured and adjusted the exhaust to the biggest size that comes in the hotcams kit of 3.50mm and I'm still too loose on the clearance. The intake was still in spec even with the new valves. Is it possible that the shim buckets have just worn too much or am I overlooking something.
 

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The buckets should not have worn that much, cam lobes will show it if they are.
I would go back and double check everything first, make sure you're on the right stroke to be checking/adjusting them.
And as you probably know, the 400 engine is the Suzuki/Kawasaki engineering team build.
And at that time Suzuki manufactured all the engines for Artic Cat.
So there is alot more info on Suzuki sites and forums than Kawasaki or Artic Cat.
 

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04 raptor 660. 686 big bore with open airbox/k&n. Big guns slip on exhaust
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167 Posts
Discussion Starter · #3 ·
Didn't see much wear on the lobes of either cam. Maybe your right that I was on the wrong stroke, I normally verify by putting my finger over the hole to tell but this one is so sunk down into the head I can't reach it.
As far as the engineering of the engine I had noticed that it's all the same parts as the ltz400/kfx400 so guess that makes sense.
Just thought I'd ask around here since you guys are very knowledgeable. Thanks for the response six.
 

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Put a straw in the plug hole and watch it, it reaches where fingers can’t.
 
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04 raptor 660. 686 big bore with open airbox/k&n. Big guns slip on exhaust
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167 Posts
Discussion Starter · #5 ·
That Works well for telling TDC but I don't think it's gonna seal enough to tell me compression or exhaust stroke
 
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