Yasuni C21 vs. C30
- Thread starter beta675
- Start date
D
Deleted member 12009
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Yes
Nick L Møller
Danish Tuner 100%
Is the same
EatMyDust
Well-Known Member
(this is a copy of what i've written in other thread)
I have bought both exhausts (for minarelli Hor. LC) and tested with a tuned hebo manston 4 and i can feel the diferences, on all powerband,higher rpm's achieved, yasuni c30 it's a little bit shorter because of the small header, the stinger it's bigger, and if you see the exhausts side by side, you can see the diferences of the cone angles...on my country (portugal), i never seen a dyno for motorcycles, so i can't give you dynographs, but if you search a little on this forum you can find dynograph's like i did, before i buy the c30 i've made a little search to ensure that c30 was better than c21... And it sure is...
http://forum.scooterforum.net/forum/showthread.php?t=98325&page=4&pp=30&highlight=yasuni+c30
click on it to see the graph's
oh, and sorry for my bad english
cheers
I have bought both exhausts (for minarelli Hor. LC) and tested with a tuned hebo manston 4 and i can feel the diferences, on all powerband,higher rpm's achieved, yasuni c30 it's a little bit shorter because of the small header, the stinger it's bigger, and if you see the exhausts side by side, you can see the diferences of the cone angles...on my country (portugal), i never seen a dyno for motorcycles, so i can't give you dynographs, but if you search a little on this forum you can find dynograph's like i did, before i buy the c30 i've made a little search to ensure that c30 was better than c21... And it sure is...
http://forum.scooterforum.net/forum/showthread.php?t=98325&page=4&pp=30&highlight=yasuni+c30
click on it to see the graph's
oh, and sorry for my bad english
cheers
beta675
Well-Known Member
...I see so there's a difference, performance wise i think the gap is not that great but the way it was made (C30) it is much more good looking than the C21....Btw, which one of these pipes is easy to tune?....It will be fitted on a Stage 1 tuned 6TMHRteam cylinder with full Malossi peripheries....
tiba_karotsu
OVERREV TUNING
& i will be the one doing the tuning hehehehe. 
Vissa
PB Guru
pr0ve said:Thank you! You've proven my point!
That test wasn't good.
Between the 2 runs there was a temperature difference of 10 digrees.
That can cost you or deliver you a higher score.
I'm still with my opion: The c21 and c30 are 99% the same.
On every scooter the exhaust will preform different, so
FUracing8
FUracing8
The C30 is definately made better than the C21. The header is also a little shorter and the cone angles are more gradual, making it a free-er flowing exhaust. On the 2F4R motor I built using all malossi gearing and clutch and over-range system, the C30 performed better all around than the C21 and that was after I changed weights for optimal C21 settings. With the C30 and weight set-up, the bike was 1.3 mph faster on the 150 meter stretch than with the C21 setup.
trueOverrev
Well-Known Member
FUracing8 what was the HP of your 2F4R,C30 bike, if you dont mind me asking.
FUracing8
FUracing8
No way of really telling seeing as the local transport control department won't let me have a shot on it's dyno because the bike isn't street legal.....but I'd imagine somewhere around 25/26. This is my first time using the TRT stuff, so I'm being a little gentle with it, and not trying for everything I could possibly get, seeing as I need it to last for the rest of the season down here.
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