Comberjohn wrote:Firstly, you can eliminate the TPS by unplugging it and trying the bike.
It's designed to help anti pollution measures but will run without it.
When decelerating, it cuts the fuel until below 2000 rpm and enriches it at full throttle.
Some find is smoother without it. I did. There are threads about the pros and cons of using it.
Does the misfire appear after the engine warms up?
Could be the ignition triggers behind the T shaped cover on the front of the engine. If you heat them with a hair dryer when the engine is cold and the misfire is there immediately. That's the problem.
Not unheard of.
Other possibility is, are you using resistor spark plugs with resistor leads? 
There'll be be more suggestions soon.
The inmates here like a problem.

• The FICU will operate in partial loade mode while idling. No big problem but you'd need to consider this when tuning the engine.
  
• Base fuel injection will be maintained instead of being cut when 'throttling off' (closed throttle at speed, engine above 2k) which will reduce the effect of engine braking. Some like this because it's a smoother transition when throttling off. You'll get slightly less tyre wear on the rear but you may find the need to use front bakes more. This is really going to be down to personal preference.
  
• Partial load mode will operate as normal but you will not get full lode enrichment when the throttle is fully opened. No biggie either unless you're a rev-head or maybe one day you need that little extra to get yourself out of a situation.
  

Kaptain Holister wrote:After warm up and a base fuel injection time is reached, the FICU has 3 modes, idle, partial load and full load and enrichens fuel injection to suit the demand by increasing injection times. these 3 modes aretriggered by the TPS.

Idle mode is triggered when the throtle is closed and revs are below 2k. There is no enrichment to the base fuel injection times except to compensate for temp and air etc etc. The 'throttle closed' position switch is open (ie continuity). If engine revs are above 2k with throttle off, the FICU cuts injection completely untill below 2k.

Partial load mode is triggered when the throttle is opened. This enrichens the mix slightly to cope with normal running at higher revs. The 'throttle closed' position switch is now closed (ie no continuity).

Full load mode is triggered when the throttle is fully opened. This enrichens the mix further to provide hard acceleration. The 'throttle fully open' position switch is now open (ie continuity).

You can disconnect the TPS without any adverse effect but the 'throttle closed' and 'throttle fully open' switches will in effect be considered closed (no continuity) by the FICU. This will result in...

• The FICU will operate in partial loade mode while idling. No big problem but you'd need to consider this when tuning the engine.
  
• Base fuel injection will be maintained instead of being cut when 'throttling off' (closed throttle at speed, engine above 2k) which will reduce the effect of engine braking. Some like this because it's a smoother transition when throttling off. You'll get slightly less tyre wear on the rear but you may find the need to use front bakes more. This is really going to be down to personal preference.
  
• Partial load mode will operate as normal but you will not get full lode enrichment when the throttle is fully opened. No biggie either unless you're a rev-head or maybe one day you need that little extra to get yourself out of a situation.
  

Hope this helps.

Re the misfire. Worth checking the coils and easy to do. They can malfunction when warm.
Cracked casing will cause earth leak. Lightly sparay coils and leads with water/detergent with garage door down.
Windings may be shorting. There are posts which outline how to test the impedance of the coil winfings and leads etc. Just use the Google/forum search box on the portal tab