Cans that dont need re-jetting ?

[tonyrec]

Thinking about getting a new End Can for my 2002 Fireblade but dont want the hassle of getting it all re-jetted.

Which Cans would i be able to fit to achieve this and are there any nasty ones that i should steer clear off?

[danhay]

Tony,

if you're making the engine breathe more easily, then to be effective, you would normally need to rejet the carbs. However, I think your Blade is Fuel injected, in which case it should compensate automatically?

[rsvnigel]

danhay said:

I think your Blade is Fuel injected, in which case it should compensate automatically?

It should compensate to a certain extent automatically, after that you'll need a power commander to fine tune the fueling.

IIRC micron do some that can be bolted on without needing anything else done.

[a j]

I didn't change the fueling on my R6, i think, as standard it was running slightly rich and the micron can made it run far smoother.

[cazzo]

I'm no expert but it is my understanding that any can that is free-er (sp?) breathing should require adjustment of the fuelling, (more gases out = more gases in & without turning up the fuelling it will simply take more air and so run lean = not good ) some manufacturers claim that they don't need it but if you want the job doing properly then it will need some 'fettling' I don't think any of the Bike injection systems can fully self-compensate.

When I had the 'safety' cans fitted to the Duke I changed the Eprom for the fuel-injection but it still ran lean and needed the fuelling altered - but afterwards it made a big difference to the power delivery, eliminating a flat spot around 5,000 rpm and giving a strong useable power delivery from about 3,000 rpm - 10,000 rpm.

My advice, fit the can and get the fuelling checked/altered - you know it makes sense.



BTW I assume the can is for your bike & not your work bike

[goodlife]

Fettling the fuel/air mix is a job that PDQ in Taplow near Maidenhead have done for me more than once. Top job every time and not too much dosh.

Managed to squeeze a rear-wheel 130bhp from my 1994 Blade with only a full Yoshi system and dynojet kit!

[fergus]

Tony

As has already been mentioned, most bikes are jetted/set up to run slightly rich from the factory, as this offers more protection for the engine and lets it run cooler. Most cans alone don't do very much, and where they do free things up a tad, the leaning off effect shouldn't be too great. Depending upon how you intend to use your bike (on the track only I hope, otherwsie you'll have to nick yourself for no BSI Shite mark ). If you just want the noise, you'll be OK, but as has also been said, a rejet (which is often no more than raising the needle in the carb a position or two and maybe an increase in the main jet a size or two) will be tall that's needed. Until the throttle is open fully the main jet doesn't really do very much, but the part load will be helped by the needle position being raised. There's loads on the web about all of this. If you are happy to tinker with your carb (it's not that daunting really), you can feel the difference if you adjust one thing at a time and try similar tests. What's the bike? Cheers.