miss when throttleing hard

martinrhys · 09-26-2009, 6:48 PM

Hi
I have a 2000 fireblade 929 injection.
Problem is when throttle is opened fast it misses ang bogs terribly for a few seconds and then clears and revs fine until you shut off. Very annoying when trying to accelerate past anything.Changed plugs and changed coil caps.
Martin

shark954 · 09-26-2009, 7:04 PM

I take it the bike is nice and warm when you try to do this??

martinrhys · 09-26-2009, 7:35 PM

Yes at normal operating temp.

bladeracer · 09-26-2009, 11:15 PM

Quote:

Originally Posted by martinrhys

Hi
I have a 2000 fireblade 929 injection.
Problem is when throttle is opened fast it misses ang bogs terribly for a few seconds and then clears and revs fine until you shut off. Very annoying when trying to accelerate past anything.Changed plugs and changed coil caps.
Martin

This is with the revs above 4000rpm?
Is the HTEV still hooked up?
It's probably worth pulling the vacuum line off the fuel pressure regulator and make sure it doesn't have fuel in it.

martinrhys · 09-27-2009, 4:21 PM

HI
Dont think i have one on there, as the bike is fitted with a full micron pipe.
Am i write in saying the HTEV is the adjustable valve in the exhaust controlled by the servo motor.
Will try the vacuum pipe to see if it has fuel in it.
Thanks

bladeracer · 09-28-2009, 12:10 AM

Quote:

Originally Posted by martinrhys

HI
Dont think i have one on there, as the bike is fitted with a full micron pipe.
Am i write in saying the HTEV is the adjustable valve in the exhaust controlled by the servo motor.
Will try the vacuum pipe to see if it has fuel in it.
Thanks

My point really was is this a problem above 4000RPM? Below 4000RPM it doesn't sound abnormal.
Yes, the HTEV is the exhaust valve.

martinrhys · 10-19-2009, 6:03 PM

HI yes it does clear after about 4000rpm. Sorry havent got back in touch sooner been away for a while.

bladeracer · 10-19-2009, 6:23 PM

Quote:

Originally Posted by martinrhys

HI yes it does clear after about 4000rpm. Sorry havent got back in touch sooner been away for a while.

Sounds perfectly normal then.
It's a motorcycle so it isn't designed to accept hard throttle below about 4000RPM.

martinrhys · 10-25-2009, 5:41 PM

still doesnt seam write never had this problem with any other motor bike i have had ?

bladeracer · 10-26-2009, 4:25 AM

Quote:

Originally Posted by martinrhys

still doesnt seam write never had this problem with any other motor bike i have had ?

Can you ride another one for comparison?

martinrhys · 11-03-2009, 4:22 PM

Dont know anyone with the same bike. my mate has an older carburetor model and that doesnt do it.

bladeracer · 11-03-2009, 11:18 PM

Quote:

Originally Posted by martinrhys

Dont know anyone with the same bike. my mate has an older carburetor model and that doesnt do it.

If it's got a PC maybe try some different maps and see if it makes any difference.
Or post a video perhaps, although I'm not sure how effective that will be.

martinrhys · 11-10-2009, 6:35 PM

HI
Not sure i now what you mean by PC or about posting a video.
Could you please explain.
Thanks

bladeracer · 11-11-2009, 2:21 AM

Quote:

Originally Posted by martinrhys

HI
Not sure i now what you mean by PC or about posting a video.
Could you please explain.
Thanks

PC is a Power Commander for adjusting the fueling.
If you post a video of the bike doing whatever it's doing then perhaps somebody might be able to help diagnose it better.