Exhaust = Lean?

[Benson_JV]

Salutations Gentlemen

I've recently got the CBR out of hibernation and put my straight through pipe on. This one.

Now, from what I understand, a gutless pipe like this will cause the bike to run lean, I know it needs a rejet as it's taken all the midrange but what I'm concerned about is doing damage.
Is this pipe likely to cause any damage to the bike between now and when I get dyno time? (Perhaps next paycheck)
I'll stick the stock can back on if so.

Thank you
Benson
____________________
Willson - "If you go out on that CBR600 in the winter, you're going to do more miles on your side than on your wheels."
Riding: CBR600FW Driving: Audi A6
Previous Bikes: '96 Bandit 600, '96 GPz305

[Copycat73]

a lean mixture can cause exhaust valve burn out.

pic is off a car but you get the idear
____________________
Whatever I post I have no citation and no intention of providing one..
caveat emptor

[Benson_JV]

Not good. I can understand that happening if I set the mixture lean but would an end can do such a thing?

The other thing is (and I will be doing a plug chop next chance I get) but if does smell quite heavily of petrol which I thought was a rich mixture thing, however I've been told that gutless can = lean.
____________________
Willson - "If you go out on that CBR600 in the winter, you're going to do more miles on your side than on your wheels."
Riding: CBR600FW Driving: Audi A6
Previous Bikes: '96 Bandit 600, '96 GPz305

[haroman666]

Lean = more heat which = pre-ignition = detonation.

I should note that = means "leads to" rather than "is equal to".
____________________
The mistresses: 2000 Honda CBR600f, 2000 Honda VTR1000

[P.]

Unlikely. Mine states no rejetting is required, as does yours.

[Kickstart]

Hi

Entirely possible it will screw up the mixture in different ways at different revs. Could easily be lean in some places and rich at others.

All the best

Keith
____________________
Traxpics, track day and racing photographs - Bimota Forum - Bike performance / thrust graphs for choosing gearing

[Benson_JV]

Thanks gents.

Paddy, I know it states no rejetting required and I went along with that but a friend of a friend said that I'm going to damage things if I didn't, if you haven't had any problems though then I'm happier knowing it'll be fine until I can get it done.

Cheers
____________________
Willson - "If you go out on that CBR600 in the winter, you're going to do more miles on your side than on your wheels."
Riding: CBR600FW Driving: Audi A6
Previous Bikes: '96 Bandit 600, '96 GPz305

[haroman666]

Is it a carbed bike? Or FI?

If carbed; you can make the mixture richer on the needle jet which is what I did when I fitted my can to the Bandit.

Carbs and needle jets are explained here.

At least that will richen up the mixture when you've got the throttle on 3/4's.
And to richen up idle you can screw out the pilot screws a couple of turns.
____________________
The mistresses: 2000 Honda CBR600f, 2000 Honda VTR1000

[Benson_JV]

Old '98 carb bike.

Will have a look at that link, thanks! Though I'm not sure about making it run richer across the whole rev range, I may just wait until I can get some dyno time and get the pro's to do it!
____________________
Willson - "If you go out on that CBR600 in the winter, you're going to do more miles on your side than on your wheels."
Riding: CBR600FW Driving: Audi A6
Previous Bikes: '96 Bandit 600, '96 GPz305