T
TallBoysWRF
Member
OK, if you have an explorer kit, and have the round cone style spacers connecting the ski to the brake caliper mounts, BEWARE! I have this style on my Yamaha WR400 and it has broken two sets of forks now. First time out I bottomed out the front suspension, and the cones failed, breaking off the top of my caliper mount (see pictures). I diagnosed the situation as the cones are too small of a diameter and that caused the failure. Denis at AD Boivin thought I didn't get the bolts torqued properly. I went along with that and he sent me new parts and I bought new forks because I never got a response out of Denis when I asked him to help me with the forks. I made sure I torqued the bolts to the proper spec and when checking with an allen wrench, I was actually able to tighten them a little more, so they were definitely torqued the first time. So I figure OK, I'll give it another shot.
I purchased my kit though Mike Comisac, and on his "Tour de North" he stopped by my town. On the way over to meet up with him, I casually jumped the snow bank at the end of the road to get the trail (see pics). I bottomed out the front end again and what do you know, I bend the darned cones again. This time it didn't completely break my caliper mount off, but it bent the crap out of it. I took it over and showed Mike, and apon examination of his bikes, about all of his are doing the same thing, though not to the extent of mine. Mike worked with me to get a solid plate machined to replace the cones, so kudos to Mike!
The damage to my upper caliper mount was that it twisted it, and bent it slightly up. I was able to untwist it, but it was bent up far enough that I could not get the brake caliper back on. In the process of heating the end of the fork and trying to bend it back down slightly, it snapped off. I had a feeling it would, but it was useless in the summer when bent. So, the deign flaw has destroyed two forks on my bike now, and I haven't heard one peep out of Denis at AD Boivin in regards to helping me replace the second set. With my "block" installed I won't be breaking any more forks, but that doesn't fix my broken fork.
If you have the cone spacers, my recommendation would be to start contacting AD Boivin and demanding they fix the kits before your fork break and you kill yourself because the ski completely folded around the axle. Hopefully I can save you the expense/headache I've been going through.

I purchased my kit though Mike Comisac, and on his "Tour de North" he stopped by my town. On the way over to meet up with him, I casually jumped the snow bank at the end of the road to get the trail (see pics). I bottomed out the front end again and what do you know, I bend the darned cones again. This time it didn't completely break my caliper mount off, but it bent the crap out of it. I took it over and showed Mike, and apon examination of his bikes, about all of his are doing the same thing, though not to the extent of mine. Mike worked with me to get a solid plate machined to replace the cones, so kudos to Mike!
The damage to my upper caliper mount was that it twisted it, and bent it slightly up. I was able to untwist it, but it was bent up far enough that I could not get the brake caliper back on. In the process of heating the end of the fork and trying to bend it back down slightly, it snapped off. I had a feeling it would, but it was useless in the summer when bent. So, the deign flaw has destroyed two forks on my bike now, and I haven't heard one peep out of Denis at AD Boivin in regards to helping me replace the second set. With my "block" installed I won't be breaking any more forks, but that doesn't fix my broken fork.
If you have the cone spacers, my recommendation would be to start contacting AD Boivin and demanding they fix the kits before your fork break and you kill yourself because the ski completely folded around the axle. Hopefully I can save you the expense/headache I've been going through.




