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So I took out my front exchanger last year on my 1st and only ride when the track broke @ 80mph+. Was really fun just waiting to come to a stop. Luckily I was at the head of the pack. So now I need to fix asap for this year. Yes, I'm a procrastinator and has been a busy year. My question...

I'm curious who has a tune that's MAP based instead of TPS. I've just started tuning my MPI Stage 1 Apex/Attak. After getting several base tunes from ppl on here and a very reputable tuner, they are all TPS based. Why? Remembering from my car tuning days with HP Tuners, boosted guys used MAP...

Anyone with this combo, and how did you wire it? My problem is that sometimes when I start the sled, it clears out the memory, and all my settings for gauges and such are reset to factory default. It did it on the LCD-200, and my screen and or buttons wouldn't work 1/2 the time, and it was so...

After 2 years, I've finally been able to get this out in the snow and try to tune it. I'm still working on getting the fuel tables correct, but they are close. I've been unable to find much info on what to use in my ignithion tables though. The map I got from Allen was a great starting point...

Finally got ahold of a riding friend that can recharge shocks, I'm going to try that before I get it rebuilt. Question is what pressure do I fill it to?

My rear shock is dead. Is this a factory yamaha shock, or does someone else manufacture it? I would like to do rebuild this myself. So looking for info andparts on doing it. Not sure if it needs new seals, or a recharge, but either way I want to be able to do it myself. I do all my own...

Can anyone tell me if these can be easily replaced. Going through preseason checks and found several rivets either loose or completely let loose. The crossover tube brackets being 2 that completely broke free some time last season and partially wore through the tube where it goes through the...

Anyone know what aluminum is used? I'm going to make a new one, and was going to go with 7075 if it's already 6061,or jump up to 303SS. Mine was already bent from the previous owner. I straighten it out, but obviously it's not strong enough. MPI S/C @10-12psi

Need to replace one of my wheels on my kit. What size are these, or where do I find just the wheel. Don't really want to purchase a whole kit just for the wheels. Sent from my SM-N910V using Tapatalk

Any know what it's supposed to be exactly? I have 2 apexs. One stock, one s/c. The s/c I bought used and has I think bender rails on it. They are slightly thicker. I was trying to figure out why my axle nut doesn't go on as far as the stocker, which rail thickness will affect. I had bought a...

Anyone have one of these? Looking for a pic of the cable that goes into the Power commander. I managed to rip my wires out and don't know what wire goes where. 4 wires. Red, green, blk, and yellow I think. Sent from my SM-N910V using Tapatalk

The sled I bought was setup to run 10-12lbs, but I don't care to run race fuel all the time like the previous owner did. So I'm setting it back up to the original 5-6lbs. Unless I can get away with a bit more? Changed ignition to PCV-PTI and added the ignition module. I read somewhere to pull 1...

No charts I seen or posts I've read on here have helped. I know my sled takes the 8FT kit. But does this one goes towards the rear? I'm wanting to install a set up front on the rail curve also. What kit is that? Or is that the 8FT kit and I need a different one for the rear? Sent from my...

converting ignition over from GEMS to dynojet. Got the PTI version that came with it. Bosch 0281002845. Problem is it doesn't come with a flange to weld onto to intercooler. Anyone make one? I've had no luck finding one.

I'm switching my sc apex over to pcv-pti. I bought it with the exhaust already installed. I can't find much info on the exhaust. Is it stainless? And where is the best place to install the bung? It has a crossover pipe that might be a good location. Space is limited on these sled, and I'd like...

Anyone know what the factory bearings are rated at?(chain side) C3s seem alot cheaper, or are the tolerances too high? Just curious as to what quality yamaha uses. Would going to C0, or C2 going to gain service life? Sent from my SM-N910V using Tapatalk

07 Attak w/ MPI stage 1. Bought sled used. No shim. He was running 10-12 pulleys w/ 50/50 mix. Old gems controller. Sled starts and runs great. But I want to switch to a PCV setup and would also like to add a knock sensor so I can maximize boost w/ pump gas. Mainly trail ridden. What I've read...

I'm new here to the forums. Just got back into sleds and got an 08' Apex LTX. Rode it on a few trips and loved it. Never a 2 stroke again. Well last night I picked up a S/C 07' Attak GT. 26xx miles. $5950 (good deal?) Everything looked ok with. Alot of aftermarket parts. The kit he put on it is...

Looking for suggestions on a sled for the wife. I just got back into snowmobiling, so I picked up an 08' Apex LTX and love it. Now I need something for her. Want to stick with a 4 stroke with reverse and electric start. Nothing too powerful. She's never rode one before,and she 5' 0".