M7 Track Speed?

What is the targetted track speed in a deep pow climb, at 9,000 feet?

I have an 06 153 camoplast, stock exhaust with rk head and lower gearing - 55/65. I really never paid much attention to track speed before the regear but this weekend I was keeping an eye on it and it was holding strong at 35. And with the lower gearing it seemed to hold the speed and rmps better then stock. Just curious if that is good or if I should be getting better. Also I was riding 8,500 to a little over 9,000.

Thanks

Primary - 66 cat weights, SLP maroon spring (can't remember exactly the manufacture on the spring), and Thundershift ABC kit

Secondary - stock 36 helix and sheeves (not the 10.4), cat green compression spring, shift assist, rock rollers, and bdx belt deflection adjuster

When I was really watching - we were at 9,280 feet on a short run and pull in pretty deep untouched pow. It would hold sold at slight over 7,700 rpms and 35 track speed.

I did notice when were around 8,500 feet, maybe slightly lower, the rpms would hold higher, slightly over 7,900, which i beleive is where it should be right? But I was not watching the track speed closely then.

The RK head has domes for 6-9,000 feet.

All geared up I probably weigh 230 pounds

With the clutching, setup and my weight; I figure I might be slighly under performing at 9,000+ feet.

Just curious what others are seeing and if I'm off on my thoughts. Or if I should be doing something different.

Again this was the first trip out with the lower gearing. Definitely has a little more snap on the bottom, but also it seemed to hold a lot stronger on pulls and not get loaded down as easily vs. the stock gearing. Wish I would have paid more attention to track speed with the stock gearing. RPM wish I didn't really notice a change with the new gears.

Thoughts?

mtbrizzy said:

I weigh about 165 with all of my gear on.

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Hum, we might be getting where my true curiousity lyes. Happen to know how much your riding buddy weighs or at least a best guess? Have you guys ever switched sleds to see what results you get then? Is he holding the same RPMs, 7,950? Is he running the same head or a stock head? Also what tracks are you guys running? Ultimatley, I'm wondering if it's more my body weight and the load I put on the sled; and if there is any fine tuning i can do, clutch wise, to compensate or have I basically reached my max with how much I weigh. Does a riders weight have that much impact on track speed? I'd assume yes. Seems logical a rider weighing 160 would obtain more track speed vs a rider that is 230. But how much of any impact would that have, maybe not much, or is altitude the bigger player. Next trip I'll definitely pay more attention at lower altitudes.

mtbrizzy said:

I ride an 06 M7LE 162" with a milled head and speedwerx can. Stock gearing (can't recall what the gear ratio is) and clutching was done before I bought it so I'm not sure what weights I'm running. No shift assist and stock belt deflection adjuster. I have been waqtching RPM and track speed and at about 9200 feet I am pulling around 7950 rpm and 42 to 48mph track speed in deep powder.

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It would be awesome if you could take a closer look and see if you can tell what weights you have. What springs are you running in the primary and secondary? If you didn't know, even the color would be helpful. Your sled is an LE, so I'd assume it's the titanium in the primary, which I heard is a good spring.

Send me a PM if you don't want to give any secrets away to your riding buddy. :face-icon-small-win

I appreciate the post, thank you!

mtbrizzy said:

I checked the clutching last night and I'm running a yellow/white primary spring (0646-229). Couldn't tell what gram weights were on it. On the secondary it has a Titanium 110/260 white spring and a 36 degree cam (0648-765A). This sled would have had a titanium primary spring stock but the clutch has been replaced so they must have changed it.

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Thanks for looking into that. Don't know what it is with these sleds, why one runs better then the other, equally setup, but they do. My old man has the exact same sled as mine, completly stock mine had the low end bog his did not. Really can't compare the two any longer, he doesn't ride mountains anymore and its setup with the low altitude kit, but one of these days I'm going to steal his ECU....hahaha! :behindsofa: