Ok so this time I thought well ill try to save some money .. So brought a second hand Yasuni R2 exhaust on Leboncoin, This including postage was 80 euros but the silencer was a bit worn and had a yellow weave for the carbon, so purchased a 50cc Supermoto Max series black carbon for 89.00 euros on Maxiscoot.com ... this took 6 weeks to come .. so USA guys I feel your pain! lol.
The exhaust came in rough so cleaned it up using toilet cleaner.. this worked excellent but oxidisation happened immediately and therefore had to paint it.
after toilet cleaner
after painting
I asked amaya to strip the bike ready and remove the exhaust.. mission accomplished! ( no help at all.. i was busy working!)
Comparing the two together the Yasuni is of course on the bottom, they seem to be the same size but a completely different shape
Thinking that the task was straight forward,it wasn't. The header connection was too long so cut it,but this was actually angled.. so bent the exhaust up s bit to get the tail end connection to line up.. It works but there is some play on it.. maybe that my doing but its working? I did see if the jolly moto parts fitted but unfortunately not, the header connection OD was too big!
It seemed to hook up ok
The tail end was a bit messy aligning everthing, it didnt want to but I got there.
On the jolly exhaust there were two rear fixing brackets.. On the Yasuni, only one so could be another reason for a bit of play?
Et Voila
So now for the start up!!!
One of the complaints from Amaya that it didn't sound deep enough.. Well its a 50cc but changing to the Yasuni it sure took out the tinny sound out of it , feeling the weight of the parts the Yasuni is heavier so that did help a bit , the ting ting in the chamber had quietened down and the sound out the back end was a bit softer.. so she was happy.
Performance and ride!!!
Taking her out for a test drive for sure the rpm limit is better, hitting 12.6k ish before it drops power suddenly and i think,but not sure that its gone up 500 to 1000 rpm before the power kicks in so a bit more sluggish before the power band???? before she could barely do 11k max if I recall correctly.
Maybe it was due to the road/traffic conditions a bit but only managed around 100 km/h so i think a little better than before in terms of speed, I recall at the weekend amaya hitting 96 km/h maxed out?? hummm? This makes me think of going to a 15/53 sprocket as currently I'm on a 14/53??
Thoughts welcome
Cheers.