Hi All,


Over the past few weeks i've posted about a misfire issue i've had in all gears between 7-8k rpm. The bike has been at the local garage (great guys!) for the past 2 weeks for various diagnostic tests etc but i'm afraid even they have failed to solve the issue!! I'm going to list below what has been done and if no one has any ideas then I think i will be throwing the bike from the nearest cliff!!


Carb rubbers changed.
Breather pip[es checked (Tank and carbs).
Rectifier/Regulator changed to a known good part (from noggy).
Coil packs anf HT leads/caps changed to a know good set (from noggy).
Carbs cleaned and rebuilt 3 times (Rebalanced after every strip down).
Rear wiring Loom changed to a know good loom.
Fuel pump changed to a known good pump.
Generator changed from a known good engine.
Carbs & TPS changed to a known good set of carbs (balanced before testing).
Electrical check of all components (TPS, Rectifier, Coils).


The one and only thing I have yet to change is the ECU/CDI unit, does anyone think this could cause this issue?


I am happy to throw a final few quid in to the fzs black hole to test this but i'm really getting to the end of my patients!!


Any help and advise is welcome.


Regards
Greg

Afternoon all,


I finally got around to trying to diagnose an ongoing issue I have had since owning my Fazer, it seems that the bike runs great up to half throttle, as soon as I go past half throttle it starts 'spluttering' and missing. I originally thought it maybe something electrical, so I recently bought some bits from another foccer on her who was stripping his bike. I changed the Rectifier, coil packs & leads and finally the fuel pump/filter. If anything the bike now seems to pull stronger in every gear, but the issue at nearly full throttle still exists.


Im now thinking that since I had the bike, I fitted Motad stainless downpipes and can before getting the bike T&T'd, i did not however ever think of re-jetting the carbs to accommodate the increase in airflow. Would I be right in thinking that this may cause fuel starvation type symptoms at high revs/half-full throttle? If so, does anyone know how hard/easy the jets are to change?


Any help appreciated.


Greg

Afternoon all! I Finally got the fazer back from the garage today after quite a bit of work. All ses to be running well after an 80 mile ride around Brecon, but I did notice a bit of hesitance at the top end when overtaking a car on the motorway. I took it up to around 9.5k rpm and it was pulling like a train, then suddenly it felt like it hit a brick wall and it started missing, opened the throttle a bit more and a suddern surge of power! It's very strange, was wondering if the HT leads or rectifiers could be breaking down under heavy load??

Greg