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Author Topic: klx450/kx500  (Read 87571 times)

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Offline motopunk

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Re: klx450/kx500
« Reply #120 on: December 05, 2013, 11:44:44 PM »
waiting for results...  :mrgreen:
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big 2 stroke bikes are weapons for real men, who donīt fear death or devil. ;O)
ī83 kx250, ī87 kx250 (with 360 big bore), 87 kx500, ī93 kx500 sfc

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Offline ylwgtr

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Re: klx450/kx500
« Reply #121 on: December 06, 2013, 03:11:33 AM »
Hi cbrfrenzie...I missed your post,I also thought of trying that aswell!!!!
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Offline ylwgtr

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Re: klx450/kx500
« Reply #122 on: December 06, 2013, 07:21:06 PM »
ok gents....i found the problem.....the pick up isnt strong enough to operate at the rpm the engine is cranking at (maybe 20-30 rm less then the ktm) i took an old pick up,cranked the engine and waved a piece of tool steel past it with a plug in the engine and one in the coil cap and sure enough everytime i passed the pick u i got a spark....so now i need to find a more powerful pick up or make the existing one stronger by drilling a hole in the back and putting a small strong magnet directly on the back of the core
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Offline motopunk

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Re: klx450/kx500
« Reply #123 on: December 06, 2013, 08:44:54 PM »
sounds good... youre now on the straight way to the goal...  8-)
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big 2 stroke bikes are weapons for real men, who donīt fear death or devil. ;O)
ī83 kx250, ī87 kx250 (with 360 big bore), 87 kx500, ī93 kx500 sfc

---  www.der-motopunk.de.tl  ---

Offline duudu

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Re: klx450/kx500
« Reply #124 on: December 07, 2013, 12:53:19 AM »
The oem ktm 300 starter is notoriously bad. Please get the uprated 2013 + version . It has 410w of power as opposed to the 350ish watts of the pre 2013 starter .
Also , check the bendix and gears. You might need to re-shim .

:)

It looks like a very interesting modification . I would have used a bigger , 600w starter if I were you .
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Offline ylwgtr

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Re: klx450/kx500
« Reply #125 on: December 07, 2013, 03:20:17 AM »
Hi duudu....if you read a bit further back I'm using the new starter....I don't see no problems with this starter assembly apart from filling up with mud/dust/water through the original breather hole with an unlubricated system then someone leaning on the starter wondering why it's not working when I've just discovered that a KTM that's slightly down in cranking RPM is NEVER going to fire because its NEVER going to spark!!!!!!I believe I have the answer to a majority of the starter failures out there...from an engineering aspect,the mechanics of this system are fine....but it does have design flaws(breather hole,lack of lubrication) From an electronic point of view,it also has a problem....combined together  leads to detrimental harm to the mechanical components ....bottom line is they or any other starter motor wont stand a chance when the engines never going to fire without spark ....no good cutting your leg off then trying to put a bandaid on it
« Last Edit: December 07, 2013, 03:22:31 AM by ylwgtr »
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Offline ylwgtr

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Re: klx450/kx500
« Reply #126 on: December 07, 2013, 03:45:58 AM »
I also think that this isn't getting spotted because when you think "oh it's not starting on the starter,I'd better check to see if its sparking" out comes the plug,shove it in the cap crank it now with no resistance on the system and whammo it's got spark..."oh it's got spark the problems not electrical" when as sure as my arse points to the ground....the problem is electrical!!!!
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Offline ylwgtr

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Re: klx450/kx500
« Reply #127 on: December 08, 2013, 09:16:19 PM »
motopunk.....just having a think about your friend with the ktm300 starter issues....i reckon i know what they done....the powder coat on the engine cover is very very thick....so another issue i just thought about today (not with mine but ktm300 owners) the starter,charging coil and all the other gear thats bolted to the cover cant get an earth properly....On a standard powdercoated cover the only earth they have is two dowel pins and the starter gears themselves....im guessing a fix for this is to run a thick cable from the starter body which is raw alloy finish to the chassis.....or atleast clean the bolt surface from the case cover so the bolts transmit earth
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Offline motopunk

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Re: klx450/kx500
« Reply #128 on: December 09, 2013, 05:49:21 AM »
i canīt remember what exactly was done by the shop... the bike was sold 2 years ago... 

what i still know is that they made an isolation between the startercover and the crankcase.
after this, the bike started properly with an good spark and the problem was gone... 
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big 2 stroke bikes are weapons for real men, who donīt fear death or devil. ;O)
ī83 kx250, ī87 kx250 (with 360 big bore), 87 kx500, ī93 kx500 sfc

---  www.der-motopunk.de.tl  ---

Motorrad

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Re: klx450/kx500
« Reply #129 on: December 09, 2013, 08:07:15 AM »
Quote from: motopunk on December 09, 2013, 05:49:21 AM
i canīt remember what exactly was done by the shop... the bike was sold 2 years ago... 

what i still know is that they made an isolation between the startercover and the crankcase.
after this, the bike started properly with an good spark and the problem was gone... 

What was the cover made of??

Team green had issues with ignition once due to stator cover
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Offline motopunk

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Re: klx450/kx500
« Reply #130 on: December 09, 2013, 09:26:11 AM »
Quote from: Motorrad on December 09, 2013, 08:07:15 AM
Quote from: motopunk on December 09, 2013, 05:49:21 AM
i canīt remember what exactly was done by the shop... the bike was sold 2 years ago... 

what i still know is that they made an isolation between the startercover and the crankcase.
after this, the bike started properly with an good spark and the problem was gone... 

What was the cover made of??

Team green had issues with ignition once due to stator cover


in this case it was the stock cover of the ktm300 with the e-start, same like ylwgtr is using in his project. not sure if it is aluminium or magnesium made... 

hmmm.. as far as i know, team green never used electric-starts at the k5 .. interesting... what kind of problem was it exactly?? 
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big 2 stroke bikes are weapons for real men, who donīt fear death or devil. ;O)
ī83 kx250, ī87 kx250 (with 360 big bore), 87 kx500, ī93 kx500 sfc

---  www.der-motopunk.de.tl  ---

Offline ylwgtr

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Re: klx450/kx500
« Reply #131 on: December 10, 2013, 12:19:05 AM »
Not much to update except I will have a "CDI dyno" before the end of the week....I will be able to bolt all the parts to it and dial in any amount of RPM and see what all the components are doing at any given RPM....it's about to get real interesting!!!
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Offline motopunk

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Re: klx450/kx500
« Reply #132 on: December 10, 2013, 06:29:00 AM »
also interesting:  the diference between kickstart rpm and e-start-rpm...   8-)
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big 2 stroke bikes are weapons for real men, who donīt fear death or devil. ;O)
ī83 kx250, ī87 kx250 (with 360 big bore), 87 kx500, ī93 kx500 sfc

---  www.der-motopunk.de.tl  ---

Offline ylwgtr

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Re: klx450/kx500
« Reply #133 on: December 17, 2013, 01:56:11 PM »
Ok boys....I've picked up the CDI "dyno" it's going to get interesting here...I'm need to make a mounting jig for the KTM stuff and do a few runs to see what it does...I will also run up the standard kx500 stuff and I wouldn't mind running up one of those other ones you guys are using....will be interesting to see all the outputs/spark maps on all of these units...stay tuned :)
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Offline ylwgtr

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Re: klx450/kx500
« Reply #134 on: December 17, 2013, 02:00:36 PM »
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