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  #1  
Old 09-27-2012, 09:22 AM
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Default CRV valve holding me back when fitting cylinder back

Hello

I changed piston to my CR250R 1996.

Cylinder wont go back, im sure its the CRV holding those few millimetres...

What i need to do for the CRV valve to get cylinder back and i can tighten the nuts? I really got no idea. I got much 2 stroke experience but its from rotax engines, and i would say this power valve system is so much more complicated than rotax one...

Also some kind of tap came away from the CRV case. I found a suiting place and just putted it back with fingers and when turning the system it looks like its correctly setted and works fine when checking through exhaust valve. So i think the tap found its place?

Regards
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Old 09-27-2012, 09:49 AM
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Use a mirror to line up the pin and crowfoot, or loosen the pivot arm
which will allow the upper shaft to move around until you can get it
in position.

As far as the "tap", some pictures would be helpful.

dogger
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Old 09-27-2012, 09:52 AM
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Loosened one bolt and now its placed.

Is it normal that CRV is open when bike is not running? I mean when i turn the lever thats when power valve shuts down?
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Old 09-27-2012, 10:38 AM
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Quote:
Is it normal that CRV is open when bike is not running?
Just the opposite. The flap valve and two sub exhaust valves are closed
at low RPM. They open at higher RPM to alter the exhaust timing and
volume of the exhaust chamber.

dogger
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Old 09-27-2012, 10:42 AM
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heres the video. My manual says there shouldnt be any loose on the lever. Looks like there is? I cant link the video cause i dont have 5 posts. So im gonna gather them lol.

---------- Post added at 08:42 AM ---------- Previous post was at 08:39 AM ----------

Quote:
Originally Posted by dogger315 View Post
Just the opposite. The flap valve and two sub exhaust valves are closed
at low RPM. They open at higher RPM to alter the exhaust timing and
volume of the exhaust chamber.

dogger

So you mean theres something wrong with it cause its working opposite?

Video youtube.com/watch?v=dofgBQwnH_Y&feature=youtu.be

The tap that i was talking about was pointed in around 7 seconds with finger, it just falled away and i put it back there. Everything should be fine?
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Old 09-30-2012, 04:12 AM
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What did i might have done wrong when power valve is all the time open, and closes when i pull the lever? So its working wrong way?
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Old 09-30-2012, 10:32 AM
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I don't think it's possible for the power valve to be 180 degrees out.
As long as the rotory valve under the inspection cover on the Left
side is pointing to the "I" hashmark at low rpm and turns to the "II"
hashmark as the RPM increases, it is set up correctly.

dogger
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