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August 7th, 2019, 05:19 AM   #761
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I Ride: '07Exc 525 & '07 FS 550.Just sold ' 08 Ktm 450 sxf.
What kind of cams are they going to be? Am I right assuming that they'll be for racing? I have read good things about 08 cams. I would be interested in something similar that would be good in low and mid rpm.
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August 11th, 2019, 01:06 AM   #762
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I have finally got hold of o-rings! I did a 2 bar pressure test to make sure the o-ring is in the right location and compressed enough. The o-ring is a tad too large/long for the groove, but if I pack some persistence along with the covers , I think you can make them stay in the groove too! If not, you can cut 2mm off and superglue the ends back together. Does that work for you?

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August 11th, 2019, 01:20 AM   #763
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All good for me ...I usually fit o-ring with grease to make sure they stay in the grove when pressing them works every time
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August 11th, 2019, 01:08 PM   #764
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Yes that won’t be a problem...even with my fat stubby fingers and diminishing eyesight !

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August 11th, 2019, 06:37 PM   #765
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I Ride: '07Exc 525 & '07 FS 550.Just sold ' 08 Ktm 450 sxf.
I am good with that too.
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August 12th, 2019, 01:46 AM   #766
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So am i
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August 12th, 2019, 05:41 AM   #767
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It's ok.
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August 12th, 2019, 07:51 AM   #768
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Originally Posted by polska View Post
What kind of cams are they going to be? Am I right assuming that they'll be for racing? I have read good things about 08 cams. I would be interested in something similar that would be good in low and mid rpm.
I'll be doing one set of cams with the same profiles as my existing. Inlet duration 270deg @ 0.050", max lift 13,0mm and LC 102deg ATDC. Exhaust duration 261deg @ 0.050", max lift 12,0mm and LC 106deg BTDC. I do not recall the "08" data. I used the "62" cam when racing SOHC cylinder head.

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August 13th, 2019, 04:34 AM   #769
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I Ride: '07Exc 525 & '07 FS 550.Just sold ' 08 Ktm 450 sxf.
I don't have any information about "08" cam. I only read that lots of people liked that one. It refers to cam style or type not production year. Would someone chime in on this if you have spec's on the "08" cam? I've read that it supposed to be good in low and mid rpm.
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August 13th, 2019, 12:34 PM   #770
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Another part where there seems to be room for improvement, are the valve covers. They are also on the weak side, needs frequently to be removed for checking valve clearance and has a fibre gasket. If such a cover would work with an o-ring, and be milled from a solid piece of aluminium, I guess that might also be of interest?

But first, let´s get these impeller covers completed!
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