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Post by drc174 on Nov 6, 2016 22:17:47 GMT -5
Exact, keep the gear in there as a spacer but remove everything else, belt and oill pump, easy to, should take 30-60mins
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Post by 190mech on Nov 7, 2016 18:36:59 GMT -5
Diameters are way easier to figure than circumference,,Looks like the first short headpipe section is straight,so this is an educated guess,,,Max RPM 10,300,head pipe a bit long(39%-ideal is 30-32%).Diffuser a bit short,but combined they come out to a perfect 68%..Baffle cones are decent angles,outlet pipe(stinger) is 22.6mm,might just make a good 90+ street pipe!!
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Post by oldgeek on Nov 7, 2016 19:37:56 GMT -5
Diameters are way easier to figure than circumference,,Looks like the first short headpipe section is straight,so this is an educated guess,,,Max RPM 10,300,head pipe a bit long(39%-ideal is 30-32%).Diffuser a bit short,but combined they come out to a perfect 68%..Baffle cones are decent angles,outlet pipe(stinger) is 22.6mm,might just make a good 90+ street pipe!! Thanks for the assessment. Sorry about the measurements, I forget things a lot. LOL! So do you think the durations of 193 and 131 are a little too aggressive for this pipe? I could tone it down just a bit if necessary. 70cc Piaggio |
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Post by 190mech on Nov 7, 2016 19:55:32 GMT -5
No,I'd shorten the headpipe to up the max RPM it likes..What do you think that builds max RPM will be??
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Post by oldgeek on Nov 7, 2016 20:43:17 GMT -5
No,I'd shorten the headpipe to up the max RPM it likes..What do you think that builds max RPM will be?? Have not really thought about the max RPM. Stock crank, stock flywheel and iggy, stock oversized CVT components. I think the quality of this stuff may let me see 12K. I dont really know. |
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Post by drc174 on Nov 7, 2016 21:09:54 GMT -5
Diameters are way easier to figure than circumference,,Looks like the first short headpipe section is straight,so this is an educated guess,,,Max RPM 10,300,head pipe a bit long(39%-ideal is 30-32%).Diffuser a bit short,but combined they come out to a perfect 68%..Baffle cones are decent angles,outlet pipe(stinger) is 22.6mm,might just make a good 90+ street pipe!! Thanks for the assessment. Sorry about the measurements, I forget things a lot. LOL! So do you think the durations of 193 and 131 are a little too aggressive for this pipe? I could tone it down just a bit if necessary. 70cc Piaggio I am lazy, dont want to read all. You want to replace the pipe? I did around 12000 with a MHR Racing pipe for about 219 new at 189/131, but single exhaust port. With the R, you dont want to go over 9000, and really, 193 is WAY to tough on that. C16 or more. |
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Post by oldgeek on Nov 8, 2016 7:23:36 GMT -5
drc174 This was a stock Piaggio motor, that I wanted to do a BBK and a pipe. I bought an airsal single ring aluminium single ex port kit, and a Yasuni R pipe. The Airsal kit did not set up too well so I bought a S6 MKII sport to try. The S6 did not set up very well either. On both kits if I space the cylinder out to get the piston flush with the bottom of the transfers at BDC the squish is huge and the durations are high.
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Post by drc174 on Nov 8, 2016 10:46:08 GMT -5
drc174 This was a stock Piaggio motor, that I wanted to do a BBK and a pipe. I bought an airsal single ring aluminium single ex port kit, and a Yasuni R pipe. The Airsal kit did not set up too well so I bought a S6 MKII sport to try. The S6 did not set up very well either. On both kits if I space the cylinder out to get the piston flush with the bottom of the transfers at BDC the squish is huge and the durations are high. Couple of options: Drop the squish. I had mine at 0.87mm with 189/131 if i remember correctly. Not 100% ideal, but far more than enough. However, what do you mean did not set up well with the Airsal? My sport MK2 ran decent enough with a sill QTRE pipe. Are you sure your carb/cvt adjustments are correct? Drop the squish to 0.9, put the R back on and play around with 5.5-6.5 gr (19x15.5) |
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Post by oldgeek on Nov 27, 2016 21:44:20 GMT -5
I started thinking about where this build was leading me to. I originally just wanted to throw an aluminium kit and a mild pipe on and tune it just a bit. But since both cylinders I have end up with long duration's if I space them up to where the transfers are flush with the piston at BDC, the Yasuni R pipe I have will not work well. So I took advantage of a holiday sale and ordered a Yasuni C16. After all said and done I got the pipe for about $180. Hopefully the stock crank and CVT components will hold up for a while.
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Post by ryan_ott on Nov 27, 2016 21:46:22 GMT -5
Sweet deal, I'm sure you'll be happy with it.
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Post by oldgeek on Nov 29, 2016 15:19:30 GMT -5
 Yasuni C16 for a piggy 
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Post by spaz12 on Nov 29, 2016 15:44:53 GMT -5
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Post by 190mech on Nov 29, 2016 19:06:25 GMT -5
Those smooth press formed head pipes are sooo nice!!  |
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Post by drc174 on Nov 30, 2016 0:28:47 GMT -5
I started thinking about where this build was leading me to. I originally just wanted to throw an aluminium kit and a mild pipe on and tune it just a bit. But since both cylinders I have end up with long duration's if I space them up to where the transfers are flush with the piston at BDC, the Yasuni R pipe I have will not work well. So I took advantage of a holiday sale and ordered a Yasuni C16. After all said and done I got the pipe for about $180. Hopefully the stock crank and CVT components will hold up for a while. I have NEVER seen a Piaggio crank break, so do not worry. (well I melted one once, but that's a DIFFERENT story) Piaggio CVT: The Malossi one is insanely good. I do infact have a MHR CVT laying around, PM me if interested. What I would get however is a different clutch. The original Piaggio clutch is lame af, A FLy, Delta if you have the budget or even a Motofrce one are really good and give you that extra oomph off the line |
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Post by oldgeek on Nov 30, 2016 6:52:32 GMT -5
I started thinking about where this build was leading me to. I originally just wanted to throw an aluminium kit and a mild pipe on and tune it just a bit. But since both cylinders I have end up with long duration's if I space them up to where the transfers are flush with the piston at BDC, the Yasuni R pipe I have will not work well. So I took advantage of a holiday sale and ordered a Yasuni C16. After all said and done I got the pipe for about $180. Hopefully the stock crank and CVT components will hold up for a while. I have NEVER seen a Piaggio crank break, so do not worry. (well I melted one once, but that's a DIFFERENT story) Piaggio CVT: The Malossi one is insanely good. I do infact have a MHR CVT laying around, PM me if interested. What I would get however is a different clutch. The original Piaggio clutch is lame af, A FLy, Delta if you have the budget or even a Motofrce one are really good and give you that extra oomph off the line Thanks for the good news about the stock crank, I was pondering an upgrade since now I MIGHT split the cases for some port matching. I just so happen to have a HIT clutch and a Stage 6 clutch that I could use on this. Is the stock CVT any good? The rear pulley looks decent but what about the variator? |
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Yasuni C16 for a piggy
