Maintenance & Technical > KX500 Original
Project "I needed to clean the air filter so I blew the motor"
sandblaster:
Alward25, I'll check what I have and get back to you if I need one.
Motorrad:
awesome CB.. glad Im not out in left field here....
another thing I was thinking about.. on my triangle ports. is make it so they DONT open (unshroud) till RIGHT after the transfer ports uncover. in my mind, making the piston act more as a PLUNGER and getting more pressure and air moving through the transfers before it has a chance to suck through the windows keeping the charge that is in the crank case from pushing back out of the window and ending up around the reeds, as the piston compresses the new charge,, (gets the flow directoin moving in the right way first)
this will also make the boosters start sucking before the piston windows pull anything... once again. getting the flow moving in the right direction first...
thoughts?
Motorrad:
you following all this USMC? this is your motor after all...
USMC 500:
--- Quote from: Motorrad on May 22, 2013, 05:35:53 AM ---you following all this USMC? this is your motor after all...
--- End quote ---
I'm following as best I can.......I have to sit here and close my eyes to picture the flow characteristics that everyone is talking about but I'm good.......I'll ask if there are any gaps in my brain to fill. :wink:
I think sticking my piston might have initiated a new way of modding this piston and I am glad to have sacrificed my K5 engine "For Science"!!! :-D
Motorrad:
once again. this is all just REALLY REALLY ROUGHed out stuff. dont judge radius's, exact shape, size etc etc etc..
here is what I was thinking from the yz250 pistons.
this bottom cut CLOSES just as the transfers open...... which should keep it from starving the lower floor port and the boosters...
(last 2 pictures taken right as transfers open)
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