ktm dual ignition

[soundbeltfarm]

Have any of you put a switch on your bars for the dual ignition on your ktm?
what wire was it that you cut and joined?
i know you can just pull the connector apart but it makes alot more sense to put a switch on.
also how much of a difference did you notice?
cheers SBF

[SARGE]

havnt done it on a KTM, but my FJ is switchable dual ignition (stock and Dyna)

works well but i can smell my alternator sizzling away

[ruphus]

I've done it on my WR and I can notice the difference. When running on the WR map the power comes on slow but steady but on the YZ map it's wheelie time.

[green machine]

Hey Soundbelt............are you not getting your PM's........trying to fix you up for the APC(sorry for goin off topic)

[camchain]

I Just fitted a Gasser dual curve switch to my EXC200. Only $25 - a lot cheaper and better than the $75 off/on KTM single button. Has nifty no-brainer Rain/Sun icons on switch. No need to cut any wires, it's a plug and play caper but I ended up shortening the very long GG switch wires, just crimped on 2 new bullet connectors. No need to worry about which wires go where at the connection as switch is simply an open or closed circuit. I mounted the switch on R/H side between throttle and brake lever perch. Related to throttle, so made more sense to me on that side, and no fumbling around next to kill switch.

I think the dual curve ignition is only on '07 and later. Wires are the Grey to Black/White loop section that runs out of, then back into CDI. Wiring diagram in owner handbook different, shows Grey to Black/Grey for some reason. Suggest checking all wiring for chafing while you're there. I found a bad spot on section from generator to CDI.

Sorry, unable to describe effect as I'm still waiting for a @#$% piston kit (5 weeks and counting!?), but reports on KTMtalk indicate not a particularly big difference between settings. I figured anything at all that makes the job a bit easier on the slippery stuff (especially when knackered) is worth having though.

Looking forward to trying it out. Button goes on, button goes off, button goes o... Bike hits tree. Doh!

[dammad1]

I have mounted a simple flick switch on mine, but I didn't want it on the bars so I mounted just above the CDI, It is very noticeable on mine alot more perky when in aggressive mode.

Switch cost me about 5 bucks.

[Reckless]

hey great thread guys its now on my to do list. I've read about this but Havn't had the bike long enough to have a go, but now I know what switch to get etc.
I backed off the power valve a turn to suit me but his my mean I can put it forward and run two curves. Oh arn't these KTm's Great you can change power valve opening timings with a simple turn of a nut, Ignition curves with the flick of a switch etc

Thanks!!!!

Update: Just ordered the switch cheers guys!

[dammad1]

hey great thread guys its now on my to do list. I've read about this but Havn't had the bike long enough to have a go, but now I know what switch to get etc.
I backed off the power valve a turn to suit me but his my mean I can put it forward and run two curves. Oh arn't these KTm's Great you can change power valve opening timings with a simple turn of a nut, Ignition curves with the flick of a switch etc

Thanks!!!!

Update: Just ordered the switch cheers guys!

Hey rick I never bother with turning the powervalve nut I just change the springs around , did you get the three springs with it?

Yep they are certainly good you can tune them very easily to suit your riding style and conditions, I tend to smooth mine out for racing and have every thing aggressive when i'm just playing around.

[cheese]

hey great thread guys its now on my to do list. I've read about this but Havn't had the bike long enough to have a go, but now I know what switch to get etc.
I backed off the power valve a turn to suit me but his my mean I can put it forward and run two curves. Oh arn't these KTm's Great you can change power valve opening timings with a simple turn of a nut, Ignition curves with the flick of a switch etc

Thanks!!!!

Update: Just ordered the switch cheers guys!

You should have just hardened up and got used the power of the CR... HAHAHAHA

You coming to riverhead on sunday?

[Reckless]

Hey rick I never bother with turning the powervalve nut I just change the springs around , did you get the three springs with it?

Yep they are certainly good you can tune them very easily to suit your riding style and conditions, I tend to smooth mine out for racing and have every thing aggressive when i'm just playing around.

Haven't got the box yet with all the bits that went with it, so whatever spring he had in it is still in. He wanted real aggressive power so I would imagine its the lighter one that opens the power valve faster.
The power valve nut is real good once you get to know where its set, a turn either way on the day will make quite a difference. Of coarse this only controls when it opens not how fast as your spring changing does. But the last guy had it set so when you canned it along the flat it would raise the front wheel over your head in first, second and third. I've backed it off 1 turn so it holds the front about a meter or so off the ground under full power through first second and into third. About right for my skill level. I've got lots to learn between the power valve springs and nut settings and the dual curve ignition. I can see the day coming once I know exactly the settings are for the nut adjustment where I look at the trail condition and weather and give the power valve nut a 1/2 or full turn either way. Bloody good for a fiddler like me.


You should have just hardened up and got used the power of the CR... HAHAHAHA

You coming to riverhead on sunday?

Haha its about usable power!! I'm the first to admit I was always tentative on the throttle cause the bloody CR always wanted to pull my arms out? I Liked my Cr250 though. I liked the 03 Ktm better and I love the 08Ktm. Once I can afford the correct springs for my fat arse it'll be brilliant!!

Riverhead: Teaching my daughter to ride the 150 so it'll be either my paddock in East Tmaki or a trip down to try the B loop with her at Thunder. Kids first Bugger it! A new bike, xmas and work a bit thin, has left the budget a bit tight. I'll talk to my son see if he wants to do it though, txt you if we go OK.

[B0000M]

can someone explain how this tunable power valve works?

in theory the CR powervalve & ignition could be very tunable if someone were to dick around with it, seeing as it uses the throttle position to adjust the ignition map and power valve, in theory you could have some sort of variable resistor that works in conjunction with the tps sensor to give gentle maps / valving thru to the full on aggressive glory


cheese? your domain?

[cheese]

Slightly more to it than a variable pot.

Should we research it adn build EFI for our bikes?

[barty5]

can someone explain how this tunable power valve works?

in theory the CR powervalve & ignition could be very tunable if someone were to dick around with it, seeing as it uses the throttle position to adjust the ignition map and power valve, in theory you could have some sort of variable resistor that works in conjunction with the tps sensor to give gentle maps / valving thru to the full on aggressive glory


cheese? your domain?

just but a fuckin 450 4 stroke problem solved

[B0000M]

na thats a gay as idea

[kezzafish]

just buy a fuckin 450 4 stroke problem solved

ha ha, genius

[Reckless]

can someone explain how this tunable power valve works?

in theory the CR powervalve & ignition could be very tunable if someone were to dick around with it, seeing as it uses the throttle position to adjust the ignition map and power valve, in theory you could have some sort of variable resistor that works in conjunction with the tps sensor to give gentle maps / valving thru to the full on aggressive glory

I'm going to keep this really simple and short, in so, leaving myself open to the usual KB Knit picking and fault finding but here goes.

The 2 stroke power valve closes off the exhaust port they basically work by spring pressure. On all my kart engines (Yamaha, Kawasaki & Cagiva) there is a shaft driven off the clutch basket (Ktm may do it differnetly but the principle will be the same). There are weights on this shaft as it spins faster the weights put pressure on a spring which is attached to a lever which opens the power valve. Faster the engine speed the more the port is opened. Little bit like strangling performance down low. Pretty simple but very effective mechanical activation system.
So different springs open the power valve at a different rate and also adjustment on the activation means it opens later or sooner. In our Karts we used to machine the clutch basket off the drive cog (so no clutch at all draining power) and re spring the power valve mechanism so it opened faster. You could re spring the power valve mechanism with your CR 250 to achieve the same thing. Its just Ktm in their wisdom have decided to design a system that has replaceable springs of different tensions (3 supplied with every new bike) and an adjustment system that allows us to decide when we want the HIT as well.
Combine this with different electronic mapping in the ignition and you basically have what we are talking about above.

just but a fuckin 450 4 stroke problem solved
Again combine the above with different pipe designs and fly wheel weights and I repeat what I've always said you can do anything with a 2smoker the japs just don't want too as the factories and dealers make much more money out of 4 stroke valve tune ups and replacments. In saying the above I'm not sure if you could make a 2smoker as linear in power delivery as a 4 stroke but they could come very close I reckon. My 200 tractors from down low better than my CR did. Thank goodness for the Euro's keeping strokes alive and developing!!

[B0000M]

You could re spring the power valve mechanism with your CR 250 to achieve the same thing.



the bulk of your statement is true. except that the 03 (could be 04) and newer CR250 has a electronic solenoid which is operates 2 cables which operates the powervalve or 'rc valve' as they called it. so the whole power valve is controlled by electronics, hence my idea

[Reckless]

Ah yes B0000M the bulk of my experience is with earlier engines so I have no knowledge of your model. Looks like that Ktm have stuck with the spring pressure system. It seems that there's much more flexibility for Ktm in the older mechanical type system. In their wisdom Ktm may have decided if it ain't broke don't change it. Looking at the manual it looks very similar to what I've seen in past engines on my 200.


Hey rick I never bother with turning the power-valve nut I just change the springs around , did you get the three springs with it?

In picking up the manual to have a look at how the power-valve activation looks like the 200 doesn't have changeable springs like the 250/300 does. I thought you had discovered a new feature of the 08 vs the 03. The changing springs section only is for the 250/300 bikes. I'll have to investigate further I've only had the bike a few weeks. But turning the power valve nut makes a huge difference on its own. I think the 200 engine has been a little winner for a few years and the haven't touched it I'm thinking the 03 and 08 engines are the same. Somehow though, they've made the power delivery softer it certainly climbs much better than the 03 does could well be flywheel weight and powervalve spring settings I suppose. Who knows I'm not that good LOL!!!

[camchain]

I think the other reason power valves work is you're raising/lowering port timing. My guess is KTM went with a different PV design for the smaller engine as it's a bit more manic so more subtle adjustments required(?)

KTM are strange buggers for adding the dual curve ignition and then keeping it secret by not adding a switch. Even the dealer reckoned mine didn't have it, so I did a double check and found it.

BTW, anyone know where you can get the proper dirt bike clear/soft waterproof electrical connection sleeves? Re-wiring mine to be more like the much simpler XC wiring so would like to keep things tidy and crud free.

[warewolf]

In picking up the manual to have a look at how the power-valve activation looks like the 200 doesn't have changeable springs like the 250/300 does. I thought you had discovered a new feature of the 08 vs the 03. The changing springs section only is for the 250/300 bikes.AFAIK you are correct - I didn't think the '08 was different otherwise there'd be lots of talk about it. The 125/200 engine has only spring preload adjustment whereas the 250/300 engine has the 3 spring rates. They are two distinct 'families' of engines.