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TECHNICAL MOTOBRICK WRENCHING In Remembrance of Inge K. => The Motobrick Workshop => Topic started by: Angus gentleman on July 13, 2013, 09:31:15 AM

Title: Intermittent fault
Post by: Angus gentleman on July 13, 2013, 09:31:15 AM

Right guys here we go ! 1984 k100 rs .
So I drive from London to Scotland to see my parents 470 miles without missing a beat !
Get on the ferry ( parent live on the isle of Arran ! A bit like the Isle of Man but with shitty road surfaces !!! ) arrive with no drama . Next day with tragkorbs lost I go for a razz , ten miles into my fav 50 mile circuit the bike start spluttering !?!? Ticks over fine but as soon as I open the throttle cough cough splutter splutter ! No power !?!?
So pull over , park up and admire the vistas while I think what I'm going to do , ten min later go back to the bike start her up , rev her , absolutely fine ! Gggrrrr
Scuttle back to my parents and begin to worry about my return trip to London .
Two days later after lots of family and whiskey I set of back . The bike is perfect !
When I got back I drained the tank to check for water and debris ( nominal )
The pump did make a few strange noises on my return trip but has not done it again .
My old k100 had a similar kind of problem but it total cut out and it turned out to be the fuel sensor !
Any idea pump? Sensor? Or filter ? Oh and it did it again today on a 8 mile trip !
Help

Title: Re: Intermittent fault
Post by: grant71 on July 13, 2013, 10:44:35 AM

yes. similar problem with me. was fuel sensor. i contacted James Sherlock. sent a good used one. problem solved.word of caution. tricky job to fit inside  tank. use lot of patience. do it slowly and carefully. good luck

Title: Re: Intermittent fault
Post by: Grim on July 13, 2013, 10:58:30 AM

Check the boots between the throttle bodies for cracks. Clean the ECM and fuel pump/tank connectors. The pump connector is known to have issues.

Title: Re: Intermittent fault
Post by: Angus gentleman on July 14, 2013, 02:24:19 PM

Web back to the bike today and started it ! Still ticking over fine but no power !!! Now abandoned at my girl friends house ! Thank god I've got an Africa twin ! It has never broken down and it's over 20 years old ! Will try to by pass the sensor by taking the wires from pump out the to of the tank onto the block under the tank ! Sid this before on my old one and it worked though no fuel light !