Why does my Triumph Bonneville have no ignition?
At this point I checked to make sure all ignition wires were intact, gas in the tank, no leaks, fuses OK, etc. Everything seemed to be in order. I had battery power for lights and signals, and enough to even turn the engine over… just no spark-no start. I figured that one of the main electrical components had failed… coil, wires, plugs, etc.
What causes a Bonneville 790 to have no spark?
As the igniter MUST be getting power if it is present at the coil then, by a process of elimination, you can be pretty confident that a failure to spark is caused by internal igniter failure.
How does the spark igniter work on a Bonneville?
The spark induced fires in both cylinders – one approaching top dead centre on compression, the other on exhaust (so called lost spark). The igniter reads engine speed from the signal and applies the appropriate advance from the throttle position sensor.
What is the default CDI limiter on a Bonneville?
Procom CDI Limiter is set to “Default.” I just realized that I never updated this post after completing my Mikuni carb modification. With the Bonneville Performance Mikuni Carb Kit installed on my setup, I changed my Procom CDI map to #9 which seems to work the best.
At this point I checked to make sure all ignition wires were intact, gas in the tank, no leaks, fuses OK, etc. Everything seemed to be in order. I had battery power for lights and signals, and enough to even turn the engine over… just no spark-no start. I figured that one of the main electrical components had failed… coil, wires, plugs, etc.
As the igniter MUST be getting power if it is present at the coil then, by a process of elimination, you can be pretty confident that a failure to spark is caused by internal igniter failure.
Procom CDI Limiter is set to “Default.” I just realized that I never updated this post after completing my Mikuni carb modification. With the Bonneville Performance Mikuni Carb Kit installed on my setup, I changed my Procom CDI map to #9 which seems to work the best.
The spark induced fires in both cylinders – one approaching top dead centre on compression, the other on exhaust (so called lost spark). The igniter reads engine speed from the signal and applies the appropriate advance from the throttle position sensor.
Is there a CDI limiter for the Triumph Bonneville?
I went online and started searching “bonneville ignition control unit” and discovered there were many posts by Triumph owners with similar experiences to mine. After reading through the various options to fix the problem I decided to try the Procom, Programmable Hi-Performance CDI product available from NewBonneville.
What causes a spark to quit on a triumph?
— Shorted turns in secondary resulting in weak spark. — Spark quits with engine hot, returns when engine cool. — Note: Pickup coil failure is total. There is no random misfire spark loss. — Thermal intermittant with long (15-30 minute) period. — None. Get a spare. — Ohms checks hot and cold.
How does the ignition coil work on a Bonneville?
This signal, along with other feedback (e.g. throttle position sensor) is used by the igniter to calculate the correct ignition timing it sends to the ignition HT coil. The ignition HT coil in turns signals the spark plugs when to fire.
I went online and started searching “bonneville ignition control unit” and discovered there were many posts by Triumph owners with similar experiences to mine. After reading through the various options to fix the problem I decided to try the Procom, Programmable Hi-Performance CDI product available from NewBonneville.
Where to get advice for a Triumph Bonneville?
The best place to get advice for a Triumph Bonneville owner is Triumphrat.net. The members in this board are knowledgeable and very helpful. The feedback I got led me to look into the ignition pickup coil.
Why does my Bonneville spark when out of compression?
As suggested earlier you may be leaving your choke on for too long which is too rich and flooding your engine. If that does not solve it do as Tigcraft has said and change your plugs, there is every chance a new plug could be faulty, it may spark when out of the cylinder but not under compression.
What to do if your Bonneville engine is misfiring?
If that does not solve it do as Tigcraft has said and change your plugs, there is every chance a new plug could be faulty, it may spark when out of the cylinder but not under compression. Then look at plug leads, plug caps etc. Changing only one thing at a time until you eliminate the problem.
How do you remove a carburetor on a Triumph Bonneville?
I jacked up the Bonneville on my floor motorcycle jack. I removed the seat, side covers, and then the gas tank. Next I removed the carburetor brace provided by British Customs in their Airbox Removal Kit. I disconnected the wires attached to the bottom of each carburetor.
Why is my Triumph Bonneville not running properly?
After the piston is back in place and seated correctly all the way around, it is time to reinstall the cover. Make sure you remember to tighten the 4 screws down the same amount. If one is a little loose, outside air will be pulled into the carb and it will run lean, causing the engine to not run correctly.
How does the CVK work on a Triumph Bonneville?
As the piston floats up and down, it raises and lowers the needle inside this main jet. This action is what regulates the gas flow into the carb. After the piston is back in place and seated correctly all the way around, it is time to reinstall the cover. Make sure you remember to tighten the 4 screws down the same amount.
Can a stock carb be used in a stock Bonneville?
To take full advantage of these performance modifications, the stock carbs need to be able to breath more freely to allow for extra airflow. Recently I decided to switch my carb needles back to the stock Bonneville, after installing and testing Thruxton needles for a month or so.
What’s the RPM limit on a Triumph Bonneville?
After a few days of riding with the Procom ICU using Map #9, I’ve realized that the bike runs very well above 1,500-2,000 RPM, but it now runs rougher at low RPM’s and stalls easily on idle. It also will not start after sitting overnight in an unheated garage in near-freezing temperatures.
When to ride the Bonneville around the bottom of Lake Michigan?
Saturday, March 9, 2013 I had an opportunity to meet a friend for dinner and since it was a relatively warm day (in the 40’s), and no precipitation in the forecast, I decided to ride the 2008 Bonneville the 85 mile, 1.5 hour trip around the bottom of Lake Michigan to Journeyman Distillery in Three Oaks, Michigan.
Why does my Triumph Bonneville engine not start?
It was like someone had hit the kill switch while going 80 miles and hour. There was no response from the throttle. I pulled in the clutch and the engine was dead. The starter would turn the engine over, but it would not start.
Is the Triumph Bonneville ignition unit set back to default?
The unit has been set back to “default.” I’ve still been having problems starting my Bonneville in colder weather since installing the Procom. In reading through the Triumph Rat forums, I’ve discovered that cold starting is a problem experienced by other Procom users. It also struggles with a rough idle.
Where to Park a Triumph Bonneville in traffic?
I pulled in the clutch and the engine was dead. The starter would turn the engine over, but it would not start. So, since I was in the left lane and there was traffic to my right, I coasted to the center of the highway and parked near the concrete dividing barrier wall.