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Power loss at 3500rpm
Posted: Sun Aug 09, 2020 6:16 pm
by arkmark
2012rt with 118000miles on the clock. I’ve got an issue that has slowly developed from 3500-4000rpm the bike just Boggs down, no power, but as soon as we hit 4K its right back how it should be. Valves are all within spec plugs are new and I’ve ran fuel injector cleaner all with no change in how it runs. Like I said everywhere else in the rpm range it runs like a monster but from 35k-4K it falls flat on its face. So to the powers that by what are you thoughts?
Re: Power loss at 3500rpm
Posted: Mon Aug 10, 2020 7:04 am
by STeinar
arkmark wrote:
2012rt with 118000miles on the clock. I’ve got an issue that has slowly developed from 3500-4000rpm the bike just Boggs down, no power, but as soon as we hit 4K its right back how it should be. Valves are all within spec plugs are new and I’ve ran fuel injector cleaner all with no change in how it runs. Like I said everywhere else in the rpm range it runs like a monster but from 35k-4K it falls flat on its face. So to the powers that by what are you thoughts?
Check your air filter also !
But BMW are running lean and as most at about this RPM. Could also be low fuel pressure. Check your fuel filter.
STeinar
Re: Power loss at 3500rpm
Posted: Mon Aug 10, 2020 11:12 am
by arkmark
Air filter is new. What is a way to test the fuel filter? Or just get a new one?
Re: Power loss at 3500rpm
Posted: Mon Aug 10, 2020 11:25 am
by STeinar
arkmark wrote:
Air filter is new. What is a way to test the fuel filter? Or just get a new one?
The easiest would be to visit someone that can measure the fuel pressure AND capacity :-)
STeinar
Re: Power loss at 3500rpm
Posted: Mon Aug 10, 2020 12:30 pm
by Beagle
This type of question is common on all forums and whilst they induce several suggestions they rarely result in a pinpoint solution. The only real answer is a diagnostic scan by an appropriate device. Hope you get it resolved.
Re: Power loss at 3500rpm
Posted: Mon Aug 10, 2020 3:57 pm
by simbo
If you have Facebook? Join the "BMW R1200RT/R 1250RT Owners Group" page, there's a very knowledgeable chap called Steve Campbell who knows the twin cam RT inside and out, he'll point you in the right direction.