Any Idea why it does this, some times it quits when it first bogs down, today it idled ok once the rpm dropped. When it dies I have to give it throttle when restarting and after a couple of twist on the throttle it idles fine, runs great when warmed up. Has new plug wires and plugs and new silicone vacuum lines on throttle bodies. maybe needs new 02 sensors? 2013 ST 998cc. Was not touching the throttle.
Any Idea why it does this, some times it quits when it first bogs down, today it idled ok once the rpm dropped. When it dies I have to give it throttle when restarting and after a couple of twist on the throttle it idles fine, runs great when warmed up. Has new plug wires and plugs and new silicone vacuum lines on throttle bodies. maybe needs new 02 sensors? 2013 ST 998cc. Was not touching the throttle.
Did you look at your valves through the throttle bodies when you had the air box off? Was there any oil residue in the air box? Did you spray down the internals on the throttle body with Chemtool or similar? The valves can get pretty nasty. Especially if there is oil vapor coming out of your crankcase vent into the airbox. Putting the engine at TDC closes all valves and you can then soak them with Chemtool to clean things up.
Running a good fuel injection cleaner in the fuel can help if the injectors are a bit boggy.
Did you look at your valves through the throttle bodies when you had the air box off? Was there any oil residue in the air box? Did you spray down the internals on the throttle body with Chemtool or similar? The valves can get pretty nasty. Especially if there is oil vapor coming out of your crankcase vent into the airbox. Putting the engine at TDC closes all valves and you can then soak them with Chemtool to clean things up.
Running a good fuel injection cleaner in the fuel can help if the injectors are a bit boggy.
I admit I did not look down the throttle bodies with a mirror, I did spray Chemtool down them but it was not a straight shot in. And yes the air box was full of oil, but cleaned that up and ran the Crankcase vent out the bottom of the bike, passing through the glass tube with the foam inside. I have run both Sea Foam and Throttle Body Cleaner through it. Sounds like I need to check the valves and soak if needed.
Last edited by Peter Aawen; 11-24-2022 at 04:01 PM.
Reason: Caps + rann - run ;-)
2013 Spyder ST-SE5
US Army 1971-1973
Army Guard 1990
Air Guard 1991-2010
2012 & 2013 engines had throttle body issues requiring cleaning and/or replacement. Maybe that's what you're dealing with. Sorry, I don't remember the details. There was a TSB about it.
2014 Copper RTS
Tri-Axis bars, CB, BajaRon sway bar & shock adjusters, SpyderPop's Bumpskid, NBV peg brackets, LED headlights and modulator, Wolo trumpet air horns, trailer hitch, custom trailer harness, high mount turn signals, Custom Dynamics brake light, LED turn signal lights on mirrors, LED strip light for a dash light, garage door opener, LED lights in frunk, trunk, and saddlebags, RAM mounts and cradles for tablet (for GPS) and phone (for music), and Smooth Spyder belt tensioner.
2014 Copper RTS
Tri-Axis bars, CB, BajaRon sway bar & shock adjusters, SpyderPop's Bumpskid, NBV peg brackets, LED headlights and modulator, Wolo trumpet air horns, trailer hitch, custom trailer harness, high mount turn signals, Custom Dynamics brake light, LED turn signal lights on mirrors, LED strip light for a dash light, garage door opener, LED lights in frunk, trunk, and saddlebags, RAM mounts and cradles for tablet (for GPS) and phone (for music), and Smooth Spyder belt tensioner.
I admit I did not look down the throttle bodies with a mirror, I did spray Chemtool down them but it was not a straight shot in. And yes the air box was full of oil, but cleaned that up and ran the Crankcase vent out the bottom of the bike, passing through the glass tube with the foam inside. I have run both Sea Foam and Throttle Body Cleaner through it. Sounds like I need to check the valves and soak if needed.
You don't need a mirror. You can see right down into the throttle body to the valves. If you had oil in your air box. (very common) It would be a good idea to check out those valves. They may be pretty heavily loaded with carbon. If you ran your crankcase vent down to where oil drips out the bottom. Be sure to check your oil level fairly often. The vent mod can be installed so that oil is returned to the crankcase.
You don't need a mirror. You can see right down into the throttle body to the valves. If you had oil in your air box. (very common) It would be a good idea to check out those valves. They may be pretty heavily loaded with carbon. If you ran your crankcase vent down to where oil drips out the bottom. Be sure to check your oil level fairly often. The vent mod can be installed so that oil is returned to the crankcase.
I forgot to mention I did install the unit in a upright position like it was going towards the air box then curved it back down and out the bottom, so the oil will run back into the engine.
2013 Spyder ST-SE5
US Army 1971-1973
Army Guard 1990
Air Guard 1991-2010
Any ideas why it sometimes quits on a Cold start?
Reply With Quote
Originally Posted by happyspyder2039
I printed it out, will be a good winter project for me to do 
