Autonerdz forums

I am having issues with a motorcycle we have had at work for a number of months now, Triumph Rocket 3.

It initially came to us as a non runner having been run with either no or low oil pressure. Engine has been almost completley rebuilt, new crank, rods, head, both camshafts, cam chain and tensioner.

After completing the rebuild and in intiail run of the engine the bike is runnign really rough and excessivley rich which we suspect is being commanded due to low map pressures.

Scan tool indicates 770milibar atmospheric and we currently are runign anywhere from 500 to 600 at our rough idle, spec is around 422-480. Injector duration is 4-5m/s which has been proven to be roughly right from another good running bike. Have checked for air leaks, no evidence of. Have had injectors tested and came back as excellent condition. Replaced map sensor with same readings. Carried out oltage cecks and volt drop test on map all ok. Replaced all vaccum lines, Checked compression all good at 175 psi even. Checked cam timing multiple times agianst timing marks, all ok as per OEM manual. Checked valve clearances all ok.

Checked for ignition/ecm timing referanced off crank sensor and map pressures appears same timing as before rebuild. Although when a gap in reluctor teeth is used as referance where in the gap is TDC usually referanced, on this one there are 22teeth with one missing making a 30 degree window for the ecm to register tdc position?

Running out of ideas. Pugs come out heavily sooted and bike runs excessivley rich. Manufacturers technical dept has run out of ideas

What i am interested in is what else could cause low manifold vacuum? which is what we suspect to be causing the rich runing.

Thanks for any input.

Yea sorry forgot to monetion that, removed the silencers with the cats and have run it with just headers, loud but no improvement. Thanks for the suggestion tho.

Right just thought i would update this one. It was found to be 1 tooth out on the crank position. At the time i didnt have the pico and i left this empolyment before it arrived. It appeares, so i have heard that the timing marks on the new parts were not quite accurate on the crank, hence the marks lining up but still being out.

Would have been nice to get a capture with the pico but hey.