Hello, As far as I know, the valve is spring loaded to its open position, in case of a cable problem. At my sf '09 I just unhooked the cable and it just works fine, no more stalls and less tick over. Also no eng. light because the e motor still makes his cycle. Gr, N
On the mts1200 they have been too clever. The valve is still spring loaded open but you will get an ex vlv warning if the motor does not sense spring resistance. Also, on the Mts 1200 it is usually the valve itself that jams due to crud rather than the cable.
Wasting your time with WD40. You need a penetrating oil such as Silkopen. WD40 is a Water Displacer, not a lubricant as such.
It stuck again this morning, it went when I opened the throttle quickly then I set off. But I could tell as it was MUCH quieter at tick over. So the lathering of grease and WD40 (as said above) didn't do any good, the grease has just burnt off. So I will try to get that annoying bolt undone and pull the end can off and get to it properly.
The one on my track bike jammed shut, exactly the same symptoms. You need to pull the motor and cables off and bin the fecker! Reflash the ecu with a new map that has the functon disabled. Chat up Chris W....Hope you don't mind the plug Chris?
I got to to mine yesterday so the valve is gone (except the spindle). I found the exhaust clamp a pig too but after heating it up and applying WD it came undone OK. Heat is probably the way to go plus a long allen key that you can get a piece of pipe onto!
Not forgetting to rotate it inboard at the top as it's located on a spigot (which I discovered by accident!)
Did you drill out the bolts/screws or is it simply a couple of spot welds you ground down with a dremel and then unscrewed? Is the bike louder at idle and motorway speeds?
When you get the tail pipes off all will be clear. Just grind off the screw heads until you can remove the butterfly flap. The rest of the screws were still jammed in in my case so I just tidied them up with the dremel. If they should work their way out in the future they will be ejected from the pipes so not a problem. Have only run the bike in the garage and I didn't notice any difference TBO. As I understand it the valve was open at idle anyway, closing at noise drive-by rpm then opening again. So perhaps a little louder and smoother 2000 to 3000 rpm (I could be a little out on those numbers) is all that could be expected.
