J R
austin, TX
H1R
I use Si-7 in my son's 06 125 and H1R in my 250. Both perform great with no problems whatsoever. On tear down there was no scuffing at all. We run the ratio a little fat at 1:32 on both so there is some smoke. The Si-7 smokes a little more than the H1R. I would have to say that the cost of the H1R isn't really worth not having the smoke. The protection benefits are the same. Both bike's power valves are free moving with very little carbon. So little carbon that it can be wiped clean without solvents.
john bockbrader
bowling green, OH
Racing oil
The best my machine has ever run!