Hi there all!
I have recently bought a 4TX 2001 with 30.000km on the clock.
While installing heated grips I figured out that i would clean up what i thaught was old power thiefs for electrical acessories.
It was a fair lot of unisolated cables with suspicious connectors and I went to work to clean it up.
Unfortunately, I was to eager and cut two cables togheter and shorted something.
After this the bike wouldnt start. I googled a bit and searched this forum a lot and figured that I had cut the wiring from a OEM optional alarm system called Cyclelok.
I also found a RV99 supplementary service manual that shows connectors for the alarm system. Unfortunately, in my possesion the bike have never had this connectors, only a spaghetti look-alike with black-only cables.
I started fault finding with my multimeter and found that the fuel pump was faulty. So I changed that. I have guess-connected two of the cables togheter so the bike will now turn over and the fuel pump works.
I have spark on both cylinders, but they are a bit weak in my opinion ( no previous experience with yamaha).
When i try to start it ticks over fine, fuel pump runs as it should and i have spark, but after a while it backfires tremendously loud out the exhaust.
Any good suggestions ?
Cheers from Norway.
Edited by browncastle, 29 September 2019 - 07:06 am.