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Building a $6500 4-stroke mountain animal

BigUglyMan said:
The one thing that I don't like about my '03 is that the stock exhaust cooked the toe out on my good winter boot! After the first $300 pair of boots gets BBQ'd the money to go with a under seat exhaust seems well worth it.
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I am DYING to know what your riding position is that would cook your boot on the stock exhaust. We have "rider-forward" is your's "rider-prone"? :)
 

I cooked the toe of my boot too with the stock exhaust. While climbing or boondocking up on one knee my boots ended up over the end of one pipe or the other depending on the slope.

Frosty
 
Frostbite said:
I cooked the toe of my boot too with the stock exhaust. While climbing or boondocking up on one knee my boots ended up over the end of one pipe or the other depending on the slope.

Frosty
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Oh! I get it! I didn't think of that position because I only end up on my knee when I lose my balance and I stand back up as soon as I recover. Not as funny as I was hoping.
 
update how many of u are bogging down when climb in pow that is some wat wet where it packs really good this is because of the undertunnel exhaust is gettin the snow to block the exhaust an so we have come up with numerous plans wat i have done to mine is i put a little sheet of metal that goes around the tip of the exhaust so snow cant get in their seems to be working good
 
Well.......we've had some unique snow conditions this year, at least for us. We had massive dumps every day for a month. Our soft snow was over 6 feet deep at times and we started seeing something we had never seen. With deep, deep, soft, snow we would see our sleds gradually bog down while climbing. I thought it was faulty fuel pumps in revelstoke, but it popped up again in McCall in "over the hood" powder. I first thought it was jetting but eventually ruled that out. I could make a few hot passes up hills and and then could not build rpm's. Let the sled sit and then blast up the hill you could climb but gradually you would loose top end. At times i even buried my sled to the point it would stall the engine. For the last day in McCall I bolted on a 9 inch chrome exhaust tip with a downturn to the end of my undertunnel exhaust, and I made it though an entire day without bogging once. It seemed to get the exhaut out behind where the snow carries back over the track. Ton number 4 rode with us without the tip and experienced bogging. I think the extension may be the ticket, but currently our 15 foot deep snow is set up like concrete is not going to let me test it out for sure. I know two strokes experience exhaust blockage in certain snow conditions so guess we can too. It is just weird that we have not experienced it before.
 
new looks

Just thought I would share some pics of what weve been working on in Idaho. This thread has been a blast to read. Thanks for all the input. Black sled comes in around 500lbs.
 

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Turbo's been running fine. Carbing is dead on and runs consistant and strong. I hit elevation and open my icemaker valve 3/4 turn and a/f is dead on. But I only run it maybe a quarter of the rides, for a number of reasons. First, it dynamited belts. Went through two in 300 miles, always when climbing hard, always made a mess. One time took out the cooling hose and jammed up the primary, and had to tow out. Realized belt was mis-aligned and slipping, plus I realized the funny noise I was hearing climbing was the rev limiter. I finally went to heavier weights(it has a Polaris primary), lighter primary spring, aligned clutches, and have gotten three rides without blowing a belt. From the start it did not handle near as well as our stockers. A real tank at times. We kept tucking the suspension up in, lowering the back, and loosened up the front and now it handles pretty close. It definitely feels longer(drop and roll and 162), and a little heavier, but we've got it to sidehill and boondock fairly well. At least I'm not afraid to drop into tough stuff, anymore. Bottom line, when I'm heading way out and need reliabily, or snow is hard, I've taken the stocker. Turbos getting better but has been the sled for the deep snow, big hill climbing, but can tow out easy, days. My son took it out the last couple of times, and is now addicted to the power. He can toss it around pretty good and does'nt mind the sick, steep, monster hills, it will take you up, so I think it will be ridden more and more.
 
I wasn't logged in and didn't see the photos.......Yamadog, how are you getting the weight off and what are you doing to the front end? Make your own hoods? Love to see more.
 
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