Post by: Ruben92 on April 17, 2017, 03:27:48 PM
First of all i learned a lot because of this forum, thank you all!
Today i was driving on the highway and i couldn't get it faster than 85mph +-.
Also lost a lot of energy on accelerating..
My guess is that it only runs on 2 cylinders?
Already checked:
- Sparks (all 4 sparkplugs fire).
- Fuel in the hose, rail.
- Sprays fuel through the injectors.
Someone who has the knowledge to fix this, let me know! :)
Post by: Chaos on April 17, 2017, 03:51:45 PM
Post by: Martin on April 17, 2017, 03:52:05 PM
What do the spark plugs look like? What is the condition of the air cleaner element? When did you last change the fuel filter?
Regards Martin.
Post by: Ruben92 on April 17, 2017, 04:03:10 PM
I maxed out the gashandle and it felt/sounded like i was trying to cruise on that speed.
Spark plugs are in good condition (changed them last week and have a good color).
Air cleaner element is clean and there is not escaping any air.
Never changed the fuel filter.. so i will get a new one.
The K100 has had some problems and this is the first time in a year that it started. Could that have clugged the fuel filter?
I also added some injector cleaner in the fueltank.
Post by: Martin on April 17, 2017, 04:07:04 PM
Change the fuel filter then let us know.
Regards Martin.
Post by: Ruben92 on April 17, 2017, 04:52:24 PM
Thanks so far.
Post by: K1300S on April 17, 2017, 09:27:54 PM
Post by: Ruben92 on April 18, 2017, 09:19:04 AM
I will get a new fuel filter today and let you guys know!
Post by: Ruben92 on April 23, 2017, 10:48:19 AM
Date on the old fuel filter is 14/07/09 :clap:
Will put the new one in now, i'll keep you guys posted!
Post by: Ruben92 on April 23, 2017, 11:29:48 AM
What i also noticed is that the fuel pump is contantly pumping, while riding.
Changed all the cables for a new set so maybe i connected it wrong? (Not using the connector anymore and i think these cables are from a different year cause of the different colors) Spare fuses are almost all blown so maybe someone knows how to connect it correctly?
[font=.SF UI Text][font=.SFUIText]BMW -> Fueltank[/font][/color][/font][/size][font=.SF UI Text][/color][font=.SFUIText][/font][/color][/font][/size][font=.SF UI Text][/color][font=.SFUIText]Brown - Brown[/font][/color][/font][/size][font=.SF UI Text][/color][font=.SFUIText]Brown/Black - White[/font][/color][/font][/size][font=.SF UI Text][/color][font=.SFUIText]Brown/White - Yellow[/font][/color][/font][/size][font=.SF UI Text][/color][font=.SFUIText]Green/White - Green[/font][/color][/font][/size][font=.SF UI Text][/color][font=.SFUIText][/font][/color][/font][/size][font=.SF UI Text][/color][font=.SFUIText]Thanks in advance![/font][/color][/font][/size]
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Post by: Laitch on April 23, 2017, 01:47:44 PM
Changed all the cables for a new set so maybe i connected it wrong? (Not using the connector anymore and i think these cables are from a different year cause of the different colors) Spare fuses are almost all blown so maybe someone knows how to connect it correctly?Which cables did you change? Which connector are you not using? Type the last text in your post differently so some of use might read it more easily. Please supply photos of the connector and cables you have mentioned.
It's ok for the pump to run when the bike is running. You won't hear it as much if you keep the tank full of fuel and wear earplugs. Just be sure it is the pump that you are hearing and not the fan.
Post by: Steenbeen on April 28, 2017, 08:06:29 AM
Post by: Ruben92 on June 10, 2017, 07:27:43 AM
The bike was leaking oil, fixed that.
Also there was way too much oil inside.
Changed the oil for new oil and put the right amount in.
Bike starting to go faster everyday and begins to have more horsepower.
Still, this is nowhere where it should be.
My guess is that there is oil in places where it shouldnt be?
Found some oil inside the airfilterbox, so im cleaning that out now.
Throttle is not blocked, thanks for the idea.
Post by: The Mighty Gryphon on June 10, 2017, 08:42:29 AM
I had the same situation with a truck about 25 years ago. Took it about 5,000 miles to get it running right.
I suspect that in the case of my K100 part of the lack of power was stuck piston rings that weren't giving the full compression the engine was capable of. The engine used a bit more oil than it should when I got it and as performance improved the oil consumption has also dropped to about half of what it originally was. I suspect that the oil in your airbox is partially the result of the blowby caused by sticky rings.
Running it as hard as possible has seemed to help loosen things up on my bike. Johnny is absolutely correct when he says that you need to get out and get some yeehaa to get and keep these machines running at top performance. Carbon buildup in the cylinder and deposits on valve seats also respond well to hard running. Running at 5-6000rpm is actually good for these engines.
Post by: Filmcamera on June 10, 2017, 09:42:10 AM
My only word of warning would be to do that high rev running in 3rd gear and above. One other member and myself have both recently busted second gear running at 6,000 plus.
Post by: Ruben92 on June 10, 2017, 10:06:30 AM
Thats also my experience. The more i trying to ref the * out of it, the more it runs better.
There are also coming explosions out of the engine, sometimes multiple small ones, sometimes one big bang.
I will use this as my main motorcycle now and i will let you guys know the progression!
Post by: The Mighty Gryphon on June 10, 2017, 11:58:02 AM
Post by: Ruben92 on July 11, 2017, 11:44:19 AM
In the meantime the cardan gear was wrecked, so i replaced the thing.
Also i painted the motorcycle including the exhaust and exhaustpipes.
Yesterday a friend said; " Why did you only painted two instead all four"..
Cause of the heat the paint let loose. Sprayed some water on the pipes..
Only two pipes were hot.
Gonna check the sparkplugs again and i'll let you guys know!
Probably a faulty ignition coil?
Post by: Ruben92 on July 13, 2017, 06:54:23 AM
Huge power increase, but starts to leak oil out of the exhaust, probably needs some miles to flush the cilinder out.
Also uses less fuel now!
Thanks for everything!
Great forum :2thumbup:
Post by: smith913 on July 14, 2017, 12:18:39 PM
Post by: Ruben92 on July 15, 2017, 07:42:42 AM
Front Coil; Blue/Black.
Rear Coil; Red/Black
Both need a ground cable (i attached these next to the screwholes)
Also they both need the Green/Yellow cable, i put these on the slipons closest to the motor (backside of the coil)
Hope this helps you!
Post by: Laitch on July 15, 2017, 08:05:36 AM
can you post a picture of your coil hookup? i am having a similar issue and am curious if it is the same issueHere is a schematic for an early K100 like yours. See if the wire colors correspond to your set. Be sure the plug wire connections are paired correctly.
K100 coil layout from Vogel's K100 troubleshooting guide in the Motobrick.com Repair Guidance Master List.png (20.29 kB . 292x265 - viewed 1627 times)This schematic shows the plug wire pairings.
K100 coil layout from BMW workshop manual.png (104.73 kB . 330x271 - viewed 1763 times)