Post by stepthrutuner on Jul 15, 2011 16:14:43 GMT -5
Techie queggy here.
A couple of months ago I was assisting a young gentleman in trailering his '97 Yammer FZR, YZF or YTF-ever 0.6 i. bike to the local veteran two to four wheelie thingy expert of 25+ years experience. In around ten months the guy had finally succeeded in totally knackering out his tranny which, since his gain of ownership of the 600, had lacked the ability to select 2nd gear.
Anyway, I was talking to Joe, the shop owner about two strokes (he has a couple of RD350s). He said he and his buddies would make sure the volumes of the xfer chambers left-to-right were matched when fine tuning their competition dirt strokers. I don't recall reading of this in any tuning books but I could have missed it and I've only read a couple anyway. I was just wanting to get some input on the subject if anyone wanted to comment or do some searching.
It makes quite a bit of sense to me in making sure the two (four?) bursts of transferring mixture across the crown of the piston meet there evenly at midline whilst directed away from the exhaust port. The cancellation of energies helps facilitate a growing volume or "block" of entering cool gases that "wedge out" the fleeing hot exhaust gases. The upward aimed flow of the boost port(s) opposite the exhaust port helps drive exhaust gases lingering in the upper chamber toward the exhaust side of the cylinder.
Anyway, anyone heard of evening these things up?
A couple of months ago I was assisting a young gentleman in trailering his '97 Yammer FZR, YZF or YTF-ever 0.6 i. bike to the local veteran two to four wheelie thingy expert of 25+ years experience. In around ten months the guy had finally succeeded in totally knackering out his tranny which, since his gain of ownership of the 600, had lacked the ability to select 2nd gear.
Anyway, I was talking to Joe, the shop owner about two strokes (he has a couple of RD350s). He said he and his buddies would make sure the volumes of the xfer chambers left-to-right were matched when fine tuning their competition dirt strokers. I don't recall reading of this in any tuning books but I could have missed it and I've only read a couple anyway. I was just wanting to get some input on the subject if anyone wanted to comment or do some searching.
It makes quite a bit of sense to me in making sure the two (four?) bursts of transferring mixture across the crown of the piston meet there evenly at midline whilst directed away from the exhaust port. The cancellation of energies helps facilitate a growing volume or "block" of entering cool gases that "wedge out" the fleeing hot exhaust gases. The upward aimed flow of the boost port(s) opposite the exhaust port helps drive exhaust gases lingering in the upper chamber toward the exhaust side of the cylinder.
Anyway, anyone heard of evening these things up?
