Thought I would post my results from grinding my 415's.
It is easier than I expected using a bench grinder, dremel, and sander.
I used one of the pins that hold the ramps in to pin the 3 together, clamped them, then used the bench grinder to take off some metal. I used a sharpie to make a sweeping s curve starting at the bottom and finishing about 1/8-1/4" under the top of the ramp. After grinding them together with the bench grinder, I switch ramps (outside to middle, left to right) a few times and used the dremel for the rest so I could make sure they were all equal. Finished them off with sanding for a fine finish.
I wanted a lower engagement, to get a little more track speed at lower rpm's for boon'in, and get a faster upshift. I also wanted to steepen the finish ramp up to increase my WOT rpm's so I could ride in clicker 3 instead of 4-5. Here is my results from 2 days of deep powder testing.
Started on clicker 1 on the trail up. Parked around 1400 feet and rode trail up to 4300. Engagement is around 3800 (used to be about 4500) and I was doing 40mph at 6000rpm and 45mph at 6500 (uphill). Once in the deep (dry baseless over the hood), I found that it still wanted to clicker up to 4 or 5 but it sure ripped. Held very steady rpm's and I never got the drop off after WOT runs. I wasn't doing any long, long climbs though, mostly boon'in but I did make a few 45 second runs. I sharpied both clutches and the primary is shifting out to within 1/2"-3/4" of the outside and the secondary seems to be shifting in almost all of the way. I think it definitely upshifts faster and I like the crawlability better. I have Big John's secondary kit so it has always had amazing backshift but now it has both. Can't ask for much more than that.
I reground the ramps again tonight to take off just a little more after checking and cleaning the clutches to make sure everything was ok. I will report after I ride again.
I am running full pins with a black 185/410 primary, ducks floating seconary, and BJ's secondary kit.
It is easier than I expected using a bench grinder, dremel, and sander.
I used one of the pins that hold the ramps in to pin the 3 together, clamped them, then used the bench grinder to take off some metal. I used a sharpie to make a sweeping s curve starting at the bottom and finishing about 1/8-1/4" under the top of the ramp. After grinding them together with the bench grinder, I switch ramps (outside to middle, left to right) a few times and used the dremel for the rest so I could make sure they were all equal. Finished them off with sanding for a fine finish.
I wanted a lower engagement, to get a little more track speed at lower rpm's for boon'in, and get a faster upshift. I also wanted to steepen the finish ramp up to increase my WOT rpm's so I could ride in clicker 3 instead of 4-5. Here is my results from 2 days of deep powder testing.
Started on clicker 1 on the trail up. Parked around 1400 feet and rode trail up to 4300. Engagement is around 3800 (used to be about 4500) and I was doing 40mph at 6000rpm and 45mph at 6500 (uphill). Once in the deep (dry baseless over the hood), I found that it still wanted to clicker up to 4 or 5 but it sure ripped. Held very steady rpm's and I never got the drop off after WOT runs. I wasn't doing any long, long climbs though, mostly boon'in but I did make a few 45 second runs. I sharpied both clutches and the primary is shifting out to within 1/2"-3/4" of the outside and the secondary seems to be shifting in almost all of the way. I think it definitely upshifts faster and I like the crawlability better. I have Big John's secondary kit so it has always had amazing backshift but now it has both. Can't ask for much more than that.
I reground the ramps again tonight to take off just a little more after checking and cleaning the clutches to make sure everything was ok. I will report after I ride again.
I am running full pins with a black 185/410 primary, ducks floating seconary, and BJ's secondary kit.
