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Hi all,
There has been umpteen discussions on how emissions are affected by porting two-strokes. I have heard too many times that two-strokes for all the fun factor, are not very clean bikes. I wanted to share my experience and invite yours.
Here is my story. I bought a second hand RX135 5-speed. After a thorough service and decarb, I took an emissions reading with the cat-con hot (11 KM ride). I think i did not leave any loop-holes. It came up with 1.11% CO.
After porting, the cat-con was no longer usable because it did not flow well. I went in for chambers (RDD porting, so RDD custom chambers). This time the setup was nowhere near perfect yet. The carburetion was imperfect. The engine was running rich (running in). I have mild piston slap (This is a super-street setup and cant be completely warmed up by normal riding) With all this, WITHOUT a cat-con she now reads a 0.85% CO.
The secret I know is the digital CDI (Yeah, the same ole' RDDreams Digital CDI everybody is talking about) and I have emission certificates to prove this but i dont have access to a scanner to attach them here yet. I hope SKSy_Biker can help me with this.
I dunno how this compares to others. I want to know how the experience has been for the other members on this forum. Please post your feedback.
I would really appreciate it if the feedback is as detailed as your knowledge permits. Please do mention ported / non-ported, CO readings before and after, what type of exhaust you have, cat-con non-cat-con or chambers. If they are chambers and you know the source(KRP, local mech etc), please include that detail.
Thanks in advance,
Ajith
P.S. : Rajazz, i earnestly hope this makes you feel a little less bad about me polluting mother earth's atmosphere with my stupid stroker
. I wish I had a choice of a bike which gives me the kicks without paying a penalty on the pollution front, but I think I have done the best I can do within my reach.
There has been umpteen discussions on how emissions are affected by porting two-strokes. I have heard too many times that two-strokes for all the fun factor, are not very clean bikes. I wanted to share my experience and invite yours.
Here is my story. I bought a second hand RX135 5-speed. After a thorough service and decarb, I took an emissions reading with the cat-con hot (11 KM ride). I think i did not leave any loop-holes. It came up with 1.11% CO.
After porting, the cat-con was no longer usable because it did not flow well. I went in for chambers (RDD porting, so RDD custom chambers). This time the setup was nowhere near perfect yet. The carburetion was imperfect. The engine was running rich (running in). I have mild piston slap (This is a super-street setup and cant be completely warmed up by normal riding) With all this, WITHOUT a cat-con she now reads a 0.85% CO.
The secret I know is the digital CDI (Yeah, the same ole' RDDreams Digital CDI everybody is talking about) and I have emission certificates to prove this but i dont have access to a scanner to attach them here yet. I hope SKSy_Biker can help me with this.
I dunno how this compares to others. I want to know how the experience has been for the other members on this forum. Please post your feedback.
I would really appreciate it if the feedback is as detailed as your knowledge permits. Please do mention ported / non-ported, CO readings before and after, what type of exhaust you have, cat-con non-cat-con or chambers. If they are chambers and you know the source(KRP, local mech etc), please include that detail.
Thanks in advance,
Ajith
P.S. : Rajazz, i earnestly hope this makes you feel a little less bad about me polluting mother earth's atmosphere with my stupid stroker
. I wish I had a choice of a bike which gives me the kicks without paying a penalty on the pollution front, but I think I have done the best I can do within my reach. 
. No stroker friends here?
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