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Perennial upgrade question, to can or not to can?

Discussion in 'Riding Gear and Bike Accessories/Parts' started by robsalvv, Mar 30, 2005.

  1. Tried to do a search but it's a bit hard to narrow down the topic. So...

    I was wondering what the general wisdom is about retuning your bike if you fit an aftermarket performance exhaust?

    I recently highsided my bike and the can is still sound but fairly damaged. A replacement OEM can is twice the price of a Yoshi - so an aftermarket can seems the way to go. BUT!! A can not specifically tuned for the system might result in flat spots or other problems.

    I hear that most folk with carby'd bikes put in a jet kit with a new can and adjust the float level, but the 9R has plenty enough power for me, most of which I'm already not using!! ? ['029R is a carby bike]

    SOOO, what are folks' experiences with fitting slip on cans? Must you retune? If yes, should I spend the money on a dyno tune rather than let a mechanic tweak the mixture screws by ear? Does a rejet become almost mandatory with a new can? Is it better to let a performance shop like "Balls" handle the job rather than a more general bike shop? [though I'm reasonably happy with my local shop "Race Replica"]

    Advice please!



    ps. I cannot wait to get this plaster of my right wrist!!!!!!!!!!
  2. If it's just an end-can and not a full system that is meant for the road then you should be fine without any tuning. That's not to say the bike wouldn't run better with a PC and a Dyno-run but even running a standard pipe that would still be the case.
  3. I got a whole new system fitted on to my zzr.. I couldn't afford to get a re tune straigh away so I waited six months untill my next service.. And to tell you the truth the bike didnt really need to be re tuned... It ran fine after I got the exhaust and exactly the same after I got it re tuned...

    Lisa :twisted:
  4. Go the aftermarket. For the money of an OEM can you should be able to swing a full system. All you do then is get a PCII, tune it and away you go. PCII and dyno time will run somewhere between $650-$900 depending where you get it done. Most places will tune for free when you buy it thru them. Its worth it. Sounds great, gets rid of the flat spots built into the bike at the factory, and gains HP.

    Go the Yoshi too. Sounds great on a ballsy motor like a ZX9.
  5. Whether it will need a tune or not is rather bike specific, sometimes even the same model bikes will vary. Depending in your cash flow I would recommend that you get your mechanic to give it a tune with the new pipe anyway. That way, regardless of whether it needed it or not, you can be sure that the bike is running as well as can be expected.

    As far as power goes. There are those who swear that a change of pipes will increase power. But reality is that it totally depends on the bike, the pipe and how it is tuned after the two are joined. Some combinations will do nothing but sound different/better (?). Some will actually give you an increase. But again, depending on the bike, you may or may not notice it.

    So essentially, unless you are advised by the mechanic that the specific combination and a tune will increase power, don't expect it. If it does, great - bonus! But the odds are the you won't notice anyway because as you say, most of us don't use the full power of our bikes and the extra few HPs won't be noticed.

    If you do want to get an increase garenteed, then by all means goto the tuning specialists and see what they suggest in terms of cans and tuning. They are the ones who do it every day.
  6. Thanks for the considered replies folks.

    I spose I can suck it and see.

    When I got the bike, I had it dyno runned to produce a chart. What a well sorted bike, no flat spots or lumps... virtually linear from top to bottom. Hopefully a more open pipe wont mess that up.

    I did hear of a highly recommended tuning guy near the bolte bridge... might have a chat to him.


  7. Whats his name?

    A couple of top notch places are Balls Tuning, Phil tainton Racing and Dynobike.
  8. BTW. You should see decent gains on a '02 ZX9. Theres plenty of info round. Any of the well known brands should work a treat.

    But from my completely biased POV go the Yoshi RS-3. Great quality product that gives, in my opinion, one of the best sounds around. Yoshi + PCIII + K&N Filter = wooooooooo!!!!!!!!!!
  9. Cowboy, don't know the guys name... but the bike dude who extolled his virtues described him as someone who was absolutely passionate about getting the most from a bike engine. He's on either lambeth or stubbs roads, just back from the western link/bolte bridge.

    Balls are also highly regarded in the West.