westf27
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| posted on 18/2/13 at 05:09 PM |
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Two stroke advice needed
got a little 50cc honda two stroke in a moped which has a reed valve fitted to the induction manifold.
a small piece of crud had jammed the valve open which i have since reoved.The question is should the reed be just closed,under slight pressure closed
or just open.
555
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Canada EH!
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| posted on 18/2/13 at 05:27 PM |
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The reed acts the same as an intake valve in a 4 stroke, should be closed when engine not running, incoming air on intake stroke pushes it open, the
reed then closes for compression and exhaust.
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doddy
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| posted on 18/2/13 at 05:31 PM |
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if its open a little you can turn them around to get a better seal
https://www.ebay.co.uk/str/4x4wheels
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MikeRJ
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| posted on 18/2/13 at 06:09 PM |
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The reeds should be fully closed at rest. If they aren't then they have probably been bent by the crud it's inhaled.
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wombat
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| posted on 18/2/13 at 06:23 PM |
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+1 Turn them over.
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RIE
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| posted on 18/2/13 at 07:50 PM |
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quote:
Originally posted by Canada EH!
The reed acts the same as an intake valve in a 4 stroke, should be closed when engine not running, incoming air on intake stroke pushes it open, the
reed then closes for compression and exhaust.
It would be open during compression/exhaust, and closed during transfer (cylinder intake)  Air/fuel charge is in the crankcase, piston descends,
pressure in the crankcase closes the reed valve and forces the charge through the transfer port into the cylinder.
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