Well just got back from a 60 mile run and man what a difference. The bike vibrates less, excellerates harder and I can cruise 5 mph lower than before. So yes it elimated bobble/surging at lower speeds. All the TPS does is retard the timing below 6000 rpm dissconnect it and you get full advance at all rpms.rearviewmirror said:I've heard a lot of discussion on this regarding the Husky 610 but I've never heard it mentioned for the 625SMC.
Please do elaborate.... It's beyond me why a bike with a carb needs a TPS anyways, unless it's to retard the timing/iginition curve somehow.
Lastly, I imagine tracing down the TPS is easy enough, but if you would please do a write up and/or post some pics.
I wonder if the TPS could be causing the bobble/surging mine feels at constant throttle around 45MPH.
MotoWillis.. Please list your bike's setup... (Jetting/exhaust/airbox mods)
Cool..I'll go disconnect mine now, I really do think it's useless on a bike w/ a carb. I hope this does sort out the surging at constant throttle because I was about to get really creative with the jetting and fuel mixture.MotoWillis said:Well just got back from a 60 mile run and man what a difference. The bike vibrates less, excellerates harder and I can cruise 5 mph lower than before. So yes it elimated bobble/surging at lower speeds. All the TPS does is retard the timing below 6000 rpm dissconnect it and you get full advance at all rpms.
Give it a try you'll love it. the bike even sounds better.
Take your seat off and you'll see hte TPS on the left side of the carb follow the wires and it has a 3 wire plug and dissconnect it
It's makes sense that it should be disconnected considering our bikes have the same carb setup as the Husky. Well, I'll find out later. MotoWills, let me know how your bike is setup.. Exhaust and jetting wise...MotoWillis said:you'll notice when you crank it and let it warm up that it also has better throttle response
Wow.. Your's is quite different than mine.MotoWillis said:Got supermoto endcaps
KTM airbox screen
195 main jet
stock needle in the 5th position
48 pilot jet
air screw 1 3/4 out
Not sure of the thought process behind it, but it's definitely useless. I wonder if there is a cover plate you can put on the FCR to remove it permanently.B. Roe said:Why would KTM think it was necessary to put a TPS on in the first place? Emissions or noise at a certain rpm to pass DOT regs, maybe? :headscrat
I hope this is not the case, even at higher revs you were feeling pinging? Or just constant throttle cruising?lawdawgYZ400FSM said:It does pull a little harder but I was getting pinging until 4,000rpm and it surges bad at constant throttle. But I will give you it does pull harder and longer into the upper rpm but I don't think the trade off is worth it (Pinging = new piston sooner than later) and yes I was running 91 octaine