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Post by Delpzie on Mar 6, 2018 15:52:20 GMT -5
Hey guys i wanna buy stage6 racing modular stock it has 18,4hp on the wheel in tests with c30, i have yasuni c21 i would like to port it so i can achieve like 20-22hp what timings would be good ? I saw guy on youtube runing 197/131 with voca combat exhaust.
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Post by Lucass2T on Mar 6, 2018 18:38:01 GMT -5
Hey guys i wanna buy stage6 racing modular stock it has 18,4hp on the wheel in tests with c30, i have yasuni c21 i would like to port it so i can achieve like 20-22hp what timings would be good ? I saw guy on youtube runing 197/131 with voca combat exhaust. Many many many factors are involved and port timings arent holy. But id start with 195 ex and 130 transfer. Stock is around 190-130 depending on base gasket thickness. |
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Post by Delpzie on Mar 6, 2018 20:38:30 GMT -5
Stock the exhaust is 21,3mm and other ports 30,6mm, with these timing it will be 19,55mm exhaust and 30,2mm other ports. This guy runs this on voca combat exhaust www.youtube.com/watch?v=CtBMvkURjbM |
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Post by Delpzie on Mar 6, 2018 20:41:45 GMT -5
Here is stock timings.  |
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Post by Lucass2T on Mar 7, 2018 16:41:48 GMT -5
Here is stock timings. That spreadsheet is in Dutch. Where did you find it? Scooterfreaks or scooter-forum.net? I think those timings are accurate....but measured without a base gasket. I did a port timing check on my 47,6mm Athena Racing (metrakit SP3 actually) a few years ago with the 0.3mm gasket installed (if i remember right, check my 70mph build thread to be sure). Used a degree wheel printed on a 12 inch LP record (accurate). I measured 190ex, 130trans. Forgot what the boost port was. I think a Yasuni c20/c21/c30 is a tad overkill. You should stick with a Yasuni C16 or S6 R1200. |
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Post by Delpzie on Mar 7, 2018 18:00:06 GMT -5
How it is overkill when i drive it now with stage6 sport pro ported and it rips ..... its kinda funny that u say this overkill. What ever i will be thinking more into this timings i think even 197/131 wont be enough for 21/22hp at the wheel.
Edit: P.S 70mph is way too low for that cylinder i was getting 125km/h gps with the sport pro thats like 78mph, with this will be much more .
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Post by Lucass2T on Mar 8, 2018 2:08:48 GMT -5
Bravo
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Post by vlayco985 on Mar 21, 2018 17:47:59 GMT -5
Damjan,don't worry,buy your self c30 or roost sprint and you will have horsepower you want...
Just be careful not to lost your carburetor riding your bike.😝😂😂
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