Hi all, I’ve been a long time member, since 2003 when I bought the Fazer, but just haven’t kept up to date with the forum. The old bike is getting long in the tooth although I do pamper it. It see’s little use now I've stopped commuting out of London, maybe 500-1000 miles a year. Anyway, it seems to have developed a misfire. At certain throttle positions the engine hesitates and loses power. The best way to describe it, or bring it on, is to be in top gear part throttle holding a constant speed (the bike is running fine at this point) then slowly open the throttle. The engine bogs down and doesn't pick up speed. Things to point out:
- The plugs are a few years old but haven’t seen many miles, maybe a thousand or so.
- Plug caps replaced not so long ago.
- The TPS failed last year and was replaced with a used part. Tests ok though.
- Fuel filter changed (problem was there before also)
- K&N fitted many years ago. Looks clean and not due to be cleaned.
- Full stainless exhaust system fitted recently (can’t remember the problem being there before this)
- Checked carb heater pipes for blockages. Seem clear.
It’s making the bike unenjoyable to ride. I did have a similar problem back in 2010 although that was only at idle/low throttle. It turned out to be a single blocked pilot jet and is not the same as what I’m seeing now. Other than stripping the carbs (which I plan on doing this weekend), has anyone come across a similar problem?
- The plugs are a few years old but haven’t seen many miles, maybe a thousand or so.
- Plug caps replaced not so long ago.
- The TPS failed last year and was replaced with a used part. Tests ok though.
- Fuel filter changed (problem was there before also)
- K&N fitted many years ago. Looks clean and not due to be cleaned.
- Full stainless exhaust system fitted recently (can’t remember the problem being there before this)
- Checked carb heater pipes for blockages. Seem clear.
It’s making the bike unenjoyable to ride. I did have a similar problem back in 2010 although that was only at idle/low throttle. It turned out to be a single blocked pilot jet and is not the same as what I’m seeing now. Other than stripping the carbs (which I plan on doing this weekend), has anyone come across a similar problem?