flat spot under hard acceleration
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- Posts: 17
- Joined: Sun Nov 07, 2021 7:39 am
- Location: chichester
- Bike Model and Year: r1200rt 2011
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flat spot under hard acceleration
Hi everyone
Bike hesitates on hard acceleration at around 3000 and 6000 rpms. runs fine other than that.
bike is a 2011 38000 miles.
Just bought and fitted 4 new coils thinking it was that.
Today going to buy some injector cleaner to run through the tank.
valve's in speck, exhaust flap working, Throttle Synchronization done by Bmw.
Any idea's please i'am stumped
Bike hesitates on hard acceleration at around 3000 and 6000 rpms. runs fine other than that.
bike is a 2011 38000 miles.
Just bought and fitted 4 new coils thinking it was that.
Today going to buy some injector cleaner to run through the tank.
valve's in speck, exhaust flap working, Throttle Synchronization done by Bmw.
Any idea's please i'am stumped
- Randyjaco
- Posts: 224
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- Location: Friendswood, Texas, USA
- Bike Model and Year: R1200RT 2017
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Re: flat spot under hard acceleration
I had a similar problem with mine. I tried all sorts of fixes over several months to no avail. The final solution was replacing the fuel pump. The problem totally disappeared.
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- Posts: 17
- Joined: Sun Nov 07, 2021 7:39 am
- Location: chichester
- Bike Model and Year: r1200rt 2011
- Has liked: 1 time
- Been liked: 5 times
Re: flat spot under hard acceleration
Thanks guys.
Am I right in thinking this doesn’t have a fuel filter. Some kind of lifetime gauze in the tank.
If it has where is it how do you change it.
Will look into fuel pump price
Am I right in thinking this doesn’t have a fuel filter. Some kind of lifetime gauze in the tank.
If it has where is it how do you change it.
Will look into fuel pump price
- Doctor T
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Re: flat spot under hard acceleration
Have you balanced the throttle bodies?
Trust me I am a retired Doctor and lecturer at Oxford University of Structural and Mechanical/Electrical engineering.
"Blessed are the cracked, for they shall let in the light". Groucho Marx
"Blessed are the cracked, for they shall let in the light". Groucho Marx
- Randyjaco
- Posts: 224
- Joined: Thu Nov 11, 2021 3:18 am
- Location: Friendswood, Texas, USA
- Bike Model and Year: R1200RT 2017
- Has liked: 53 times
- Been liked: 46 times
Re: flat spot under hard acceleration
I agree about the fuel filter. The stock one was crap. I got an aftermarket pump that came with a real canister fuel filter.
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- Posts: 17
- Joined: Sun Nov 07, 2021 7:39 am
- Location: chichester
- Bike Model and Year: r1200rt 2011
- Has liked: 1 time
- Been liked: 5 times
Re: flat spot under hard acceleration
Fuel pump and strainer £51.76. Think I’ll order that for peace of mind.
Balance throttle bodies. Is that the same as throttle synchronisation?
Balance throttle bodies. Is that the same as throttle synchronisation?
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- Posts: 17
- Joined: Sun Nov 07, 2021 7:39 am
- Location: chichester
- Bike Model and Year: r1200rt 2011
- Has liked: 1 time
- Been liked: 5 times
Re: flat spot under hard acceleration
I don’t have the correct tool to unscrew the top of tank. Do I need one or is there some trick or will it unscrew by hand. This is a new place on the bike I’ve not been
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- Posts: 17
- Joined: Sun Nov 07, 2021 7:39 am
- Location: chichester
- Bike Model and Year: r1200rt 2011
- Has liked: 1 time
- Been liked: 5 times
Re: flat spot under hard acceleration
Update to my running issue
Fitted new fuel pump and filter. Took injectors out and cleaned and put back together.
Absolutely brilliant. The bike runs with no hesitation at any Rev range. Was definitely fuel problem. Although it ran a little better with the new coils. But that wasn’t the fix. Thanks to all
Fitted new fuel pump and filter. Took injectors out and cleaned and put back together.
Absolutely brilliant. The bike runs with no hesitation at any Rev range. Was definitely fuel problem. Although it ran a little better with the new coils. But that wasn’t the fix. Thanks to all