Hi all.
I have a 2 into 2 Supertrapp exhaust on my 3CV. I do not require it to be overly tuned for high end performance/horsepower but need a starting point as to the number of tuning discs I require. Currently there are 5 discs on each side... It is not overly loud but would like to know if this number is creating too much back pressure or rich condition?? I acquired the bike last year and this is how it was set up. Can anyone who has this exhaust give me some guidance?
Thanks!
Dean
Oh, and the jetting is 110 mains and 42.5 pilots with 2 1/2 turns out on the mixture screws... The airbox is factory.
Thanks,
Dean
What do the plugs look like?
Quote from: Tor-King on April 06, 2017, 10:03:50 PM
Hi all.
I have a 2 into 2 Supertrapp exhaust on my 3CV. I do not require it to be overly tuned for high end performance/horsepower but need a starting point as to the number of tuning discs I require. Currently there are 5 discs on each side... It is not overly loud but would like to know if this number is creating too much back pressure or rich condition?? I acquired the bike last year and this is how it was set up. Can anyone who has this exhaust give me some guidance?
Thanks!
Dean
From another source, an '86 with a similar system as yours:
I have the stock airbox with a Yoshimura exhaust system and I run:
#42.5 pilot jets
#117.5 main jets
Stock needle shimmed .035"
************************************************
I have an '87, that has a 4-1 SuperTrapp on it with six or seven discs on its can. It has size 40 pilot jets, 112.5 standard mains, and standard air jets. I can't recall how many turns out the pilot air screws are. It has always run fine, and I have put some good miles on it.
I had a Supertrap 4 into 1, it had 12 disks. I used a Factory Pro jet kit.
Kurt