Posts
70
Joined
9/3/2017
Location
AU
Edited Date/Time
10/4/2024 5:31pm
Hey guys, searching for factory KTM carbon skid plate 00-06 era 125sxs. It’s the main piece holding me up before I start my build. 
Also same as Langston/Hughes US Team
Check out this one https://www.pro-carbonracing.com/ktm-bashplate-skid-plate-125-sx-2003-1…;
i need one as well for my ex team red bull 2003 frame
The Shop
Luxon 4-Post Bar Mounts
$189.95 - $239.95
DeCal Works Huge Plastic Inventory of UFO and Polisport kits.
Free shipping: VITALMX
Think Eline actually was the supplier then
Thanks mate but not quite what I’m looking for. Plus I bought a pro carbon one a while ago and it was pretty poor quality so I sent it back
If I get one I’ll have it copied by my carbon guy who also did my frame guards 👌🏼
Well in that case you might ask from this facebook group if someone would have the skid plate what you are looking for https://www.facebook.com/groups/235400311127066
Decided to make my own skid plate based on photos I had. Fabed up a sheet of 1.6mm aluminium for the internal profile. I’ve sent that off to a friend who will make a mould from that and be able to produce some carbon skids. I also welded on mounting tabs to the frame the same style as the factory did
Also started pulling down my works GP 125 engine. Some parts are surprisingly stock or stock modified and others are super cool. Sand cast cases with some beautiful port work. “GP 03 05” engraved on the left case which means GP 2003 engine #5. 12° Vertex piston. It also runs a 95-04 YZ125 V Force reed block under a billet cover. Cylinder is stamped SXB 05 12. Which I believe means it was ported by Alex Blantz (KTM Motorsports) 2005, Cylinder #12 It was used as a go kart engine for a few years before I got it.
That crankcase looks super trick!
Sweet! Keen to see the carbon version of that skid plate once your friend is finished with it!
Very nice.
Interested if you do a run in carbon!
Got any pictures of the cylinder porting?
Yeah man, it’s pretty nice. Has a detonation ring in the top of the cylinder aswell.
Is it based on a stock casting or is it a factory casting that is different from stock?
It’s based on a stock casting. 95% of it is the same as a stock set, as almost any part can bolt onto it. The reed block flange is completely different and the intake would have much more material left for porting. Some of the threads are M6 instead of M5 also
Pit Row
Detonation ring? What in the?
Not following that either. No exhaust port bridge on Ktm,s must eat rings fast. I saw quite a few of these at millennium to get plated.
I’m not 100% sure on the reasoning but I think it’s that bronze conducts heat better than aluminum, reducing detonation hot spots. And also it’s easily replaced instead of having to scrap or rework the cylinder.
Also the same reason for 12° piston crowns and inserts. Again to reduce temp and the edge of the piston and stop det.
No issues for eating piston rings with KTM's. I have have ridden 125SX/150SX since 2005 and with dual ring piston I can ride about 30hours before the the piston and rings needs to be replaced. Much better than the Honda's port bridge design which requires lubrication holes drilled to the piston and still with those Nicasil plating is wearing out pretty fast on the exhaust bridge (and yes I have been ridden Honda's too) .
The bronze is tougher than aluminum and dissipates heat better so you can have more ignition advance on the verge of detonation to have more power. The bronze ring can also be replaced separately with out whole cylinder ending to the trash can. Using bronze detonation ring is pretty common practice with highly tuned two stroke road racing engines for a long time
Yeah Hondas exhaust port bridge is brittle. Millennium does a great job repairing them and building them up stronger. How much stronger is your engine ovr a stocker ?
Grant,s 2000 Champ 125 really sounded mean threw the mid and upper mid. I hv the 2000 125 season on vhs.
In 03-04 the factory ktm 125’s produced around 41-42whp on VHM’s dyno in The Netherlands.
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