Exhaust popping

I have taken the baffles out of the SBK can, and ok the noise is more
pleasant , But I am also getting popping when gearing down.
I have also been told that the mixture may now be too lean , and could
cause engine damage.
Now the noise although a little noisier than before, still isnt exactly
ear bashing, and Im wondering wether its worth it.

Ken
Zx636 A1p.

 

Popping on down shift is fairly normal with an open can, so I wouldn't
worry too much about that. However it will almost certainly be running
too lean if you haven't re-jetted/re-mapped (I have no idea if it's
carb or FI), unless it's a self-adjusting closed loop EFI system
(highly unlikely).

If you had the fueling sorted for the SBK can, it /might/ be ok, but
I'd still get it dyno'd. If you didn't have anything done for the SBK,
get thee to a dyno centre, & prepare to spend around £200-250 if it's
carb, or £500 if it's EFI & needs a Power Commander.

Remember that it's not just about the noise (or at least it shoudn't
be). A race can is meant to give you more power, but if you don't get
the fueling sorted, you'll have less power than with the standard can,
& probably a few flat spots too.


--
Krusty.

http://www.muddystuff.co.uk
http://www.muddystuff.us
Off-road classifieds

'02 MV Senna '03 Tiger (FOYRNB) '96 Tiger '79 Fantic 250

 

Cheers Krusty,
Can was installed before I bought the bike, cant see any receipts for a
dyno though!
Its the first 636 carbed version it doesnt seem to have flat spots , and
my mates Cbr600rr cant keep up. But can anyone tell me of a dyno centre
near Newcastle?

Cheers

Ken

 

http://www.dynojet.co.uk/tuningcentres.php?type=3

any use?

 

Tells me that Malton in N Yorkshire is the closest, which isnt too bad I
suppose, especially as my gf lives in York.
Cheers Matey.

Ken

 

I had this on my old race bike, it was a slight leak in the exhaust system
and when it was tightened it cured it.