Exhaust question for clued up types

Motorcycling
1

Almost certainly a stupid question

I was considering getting a new exhaust for my XJ6 diversion, no sensible reason for it really, I just fancy something shiny :smiley:

I don’t want to lose the centrestand, which seems to be a bit of a problem with some, so I was looking at a Scorpion silencer like this http://www.scorpion-exhausts.com/product-details.html?autoid=46.

Now I’m not doing this for a performance improvement but I had a glance at the dyno graph and it seems to the horsepower drops off much quicker than the standard under about 32mph http://www.scorpion-exhausts.com/siteadmin/site_images/uploaded_documents/207_02~_xj6.jpg.

Is that likely to make a difference do you think, I don’t care about making it faster, but I don’t want to make it slower.

2

improved airflow = more power at the top end as it becomes more efficient at getting air in and out. This has a slight negative effect on torque at the low end of the power band.

Is it massive? nope. I did notice it on my cbr (chopped down micron) however, the noise and top end more than made up for it.

3

one thing it does do though, or certainly did on my GSXR is makes the fueling less smooth. When I took the laser exhaust off and put the standard one back on, the throttle response was much nicer… If I change the exhaust on my next bike, I will definately factor in getting it mapped for it (injection engine obv)

4

Cheers Leon, I thought that fueling would be OK with just a replacement silencer (don’t know what I was basing that on)

This is nice and shiny too, must remember not get carried away with the shiny things or it’s going to be a disapointing xmas for the wife :stuck_out_tongue:

http://www.motorcycle-exhausts.co.uk/MiVV_Double_Gun_Titanium_YAMAHA_XJ6__Diversion_2009_On–product–12265.html

5

it is ‘ok’, and can be left. And if you had only ridden the bike with the new exhaust on you wouldn’t think there was a problem :slight_smile: But both with my cbr600 and my gsxr when I put standard back on, noticed the fuelling was smoother, and throttle reponse nicer thats all.

that miv looks tasty!! get it bought!!

6

id like to know if it makes much sound difference as the cat will still be there,have a look around http://yamahaxj6.proboards.com/index.cgi if you havnt already.