I had them on my 2005 MZ125SM as they came as the stock tyre. I LOVED them! here's my report,
They are AWESOME in the rain, and on the dry streets, they are awesome in the dirt, and good to great in the mud, On the little 125 they were fine on the track but I would not run them as a race tyre unless I had many sets and the track conditions called for them IE wet). I replaced them with the GREAT AVon Distanzias, but felt the Heidenaus were as good almost everywhere but felt lighter. Maybe this was because the Heids stock were a 100 130 and I went to a 110 140 on the MZ so bigger is always heavier. BUT, I would and probably will buy these again for the Project XR400R SM since they are such a brilliant tyre for general riding and glorious in the wet and dirt. PLUS they LOOK super bitchin!
I claim to be afraid of Horses, this is only to get out of attending parades. Odd but the horses get it.
2001 Honda XR400R plated and ready for little wheels and tyres!
1985 BMW E28 Dinan 535i, 2004 Focus SVT