250-500cc Ducati Ignition specs

It's been almost a year since I had shoulder surgery and I'm considering getting back on the bike, but I have to address the no spark issue. I don't want to spend any time or money on the Ducati ignition. I'm going to kick it as far as I can. I can't remember the thread, but someone posted about HPI and I contacted them about their ignition system. They have one listed for the later WR250 and he said they should work but asked about the Ducati rotor size and wanted to know if there was a drawing for one. I can't find much info, if any on the net. Is there anyone that has any real specs on the Ducati setup? Ignition curve would be nice to see also.

http://www.hpi.be/item.php?item=068K159
http://www.hpi.be/item.php?item=210K159

I hope it works

It says wr250 2001-2013? I'm interested in how this works out.

I took my flywheel and stator plate off and took some measurements and pics for HPI. I'll let you guys know if it works out and I get it running again with the HPI stuff. Once I get it running, I'll be sending out the suspension to get revalved, so it will be some time before I even think of riding again.

send it to WER and you will have it back in a week or very close to it. they get ON it, packed much nicer than how you send it.

Right now, lighting capabilities aren't on the top of my list and I know nothing about ignition curves. Can anybody tell from looking at these curves how they will perform? It would be nice to know what the stock Ducati curve looks like.

Without lighting


With lighting

Have you considered replacing only the stator with a new oem or other? A year ago after hitting a stump fairly hard my '11 300 began stalling out after it would reach normal running temps. Thought it was a fuel delivery issue or other electrical issue as I had spark at low temps but not a normal operating temps. I consulted Bill at BMP in Salem Oregon and he suspected the trigger wire in the stator may have been damaged. As a last resort I ordered and installed a new oem stator from him for about $150 and the problem was fixed. No more spark lost issue. Starting also improved.

I'm not sure what went out and there isn't any real info on troubleshooting the Ducati ignition. I did have an oily substance on the bottom of my CDI, so I suspect it. However, I don't want to through a bunch of money with the shotgun approach at a system I don't have confidence in. I ordered the HPI kit with the lighting option. Hopefully, it will work. If not, I'll try to locate an earlier analog system from a WR or CR.

Good luck and keep us posted. How much for the HPI unit, and does it come with a new stator or do you send them your oem one?

Everything is brand new. 195 Euros($210 as of today) including VAT and shipping. I don't know what the wattage of the stator is, though. It looks quite a bit smaller than the Husky one. It might be an waste of time, but I'm curious to see how it works out.

I received the HPI stuff yesterday. I was quite surprised on the fast delivery from Belgium. The flywheel is quite a bit smaller than the the WR's. It's definitely going to need a FWW. The HPI stator plate measures 94mm where as the Ducati measures 110mm. The slotted holes in the HPI stator don't line up with any bolt holes on the bike. Besides the 2 holes(yellow) for the Ducati stator, there appears to be 2 other bolt holes(red) that I'm guessing are used by the CR stator. There are 2 holes(red circles on black stator) that seem to line up with those holes, but there is a raised portion(blue arrows) next to the holes on the bike that are there to center the OEM stator and don't allow the HPI stator to sit flat and I won't be able to adjust the stator since those holes aren't slotted. I've got an email into HPI, but sometimes he answers right away and sometimes it takes a few days. I have to go out of town for work for a few days so I won't be able to attempt to install for a while.



WR vs HPI flywheel



WR stator vs HPI. Instructions say it's a 60 watter.

not liking the fit so far of course but keep us posted. the stator looks so simple!

Either im going mad or my eye sight has failed me completely - But im seeing the hole in the new flywheel as being much larger and has no key way !!!

Same size hole but yes, no keyway.

I got a reply from HPI. Apparently, I should have received the 110mm stator plate. They offer a 300g flywheel weight, so I ordered that and they'll send the stator plate, also.

The mounting holes you circled in red are for the kokusan ignition husky used thru 2010.

I was wrong.
Any trig experts here? I got the 110mm adapter plate and went to install everything and realized the HPI rotor(flywheel) has a different taper. I'm hoping there is someone much smarter than I that can figure out the degree of the taper. Unfortunately, HPI doesn't put any part numbers on their stuff and I'm trying to figure out if they sent the rotor that they think fits the Husky or a wrong part.
Measurements are approximate, but close enough to get an estimate of the taper.
Ducati flywheel
Large end 17mm
Small end 13.35mm
Length 22.25mm

HPI Flywheel
Large end 19.50mm
Small end 15.75mm
Length 28mm

From your measurements they have sent the wrong flywheel.

I realize that, but I'm trying to figure out if the the flywheel they sent matches their online specs of the part they list for the Husky or if they just sent the wrong part that has different specs. I'll just have to wait to hear back from HPI.

This is frustrating. I really don't want to install another 11+ ignition system and so far the HPI stuff has been a struggle to get bolted up. Communication with them has been a little annoying. I'm getting responses to my emails, but not the answers I'm looking for.

HPI sent me a template with different tapers and it appears that the taper is not 4 degrees like HPI says it is. It's closer to 5.7 but not quite. I think the 5.5 degree might be closer fit.

210R098 (no cone) 11.00mm 9.75mm 0°
210R234 MBK 14.95mm 9.75mm 3.0°
210R313 SM51 17.80mm 9.75mm 3.0°
210R317 Montesa 21.85mm 9.75mm 3.0°
210R323 Garelli 12.75mm 9.75mm 4.0°
210R149 KS80 16.85mm 9.75mm 4.0°
210R278 Sachs 17.15mm 9.75mm 4.0°
210R357 Husqvarna 430 18.30mm 9.75mm 4.0°
210R281 Husqvarna 250 18.80mm 9.75mm 4.0°
210R283 KTM 19.50mm 9.75mm 4.0°
210R345 Morini M1 12.70mm 9.75mm 5.5°
210R347 Garelli NOI 13.10mm 9.75mm 5.5°
210R030 Wallaroo 13.65mm 18.45mm 5.5°
210R260 Minarelli v1 14.45mm 9.75mm 5.5°
210R276 Camino 15.50mm 12.75mm 5.5°
210R034 Puch Maxi 16.00mm 9.75mm 5.5°
210R031 Piaggio 16.00mm 17.00mm 5.5°
210R218 Ciao 16.20mm 9.75mm 5.5°
210R277 FS1 16.90mm 9.75mm 5.5°
210R036 Suzuki 17.80mm 9.75mm 5.5°
210R037 RD250 AC 18.85mm 9.75mm 5.5°
210R279 CR250 19.35mm 9.75mm 5.5°
210R035 NSR 20.50mm 9.75mm 5.5°