ruffryder
TY 4 Stroke Junkie
Nikolai said:
I hope yamaha puts some new stuff into the drive train for the next years sleds. There is a bunch of weight they could loose by redoing things.. like figuring out a reverse mechanism that doesn't add 10 lbs..
beeze455
Expert
I am so tempted to remove reverse.
ruffryder
TY 4 Stroke Junkie
I wouldn't do it. Even though it doesn't work that well, I LOVE having reverse!!! 10 lbs is nothing to the ability to go backwards on the sled.... I mean backwards on purpose!!beeze455 said:
Supa Dexta
Expert
Off Trail Mike
Gone Riding!
Great thread guys, as I had totally forgot about rotating weight effects.
So if we can't find a lightweight brake disk, what about removing the fan fins on the brake disk? I hadn't thought of it until now, but do other sleds actually have fan fins on their brake disks?
I didn't check my xtx to see if the brake was the same (probably is) but do we actually need forced air brake cooling, and all the air drag that comes with it?
On steep mountian decents, I can certianly understand the need, but for those of us who ride on relatively flat terrain????
I can honestly say I am not a big user of brakes at the best of time, especially with engine braking on these sleds being so good, and I can't ever remember brake fade being an issue with snowmobiles, thus the question.
OTM
So if we can't find a lightweight brake disk, what about removing the fan fins on the brake disk? I hadn't thought of it until now, but do other sleds actually have fan fins on their brake disks?
I didn't check my xtx to see if the brake was the same (probably is) but do we actually need forced air brake cooling, and all the air drag that comes with it?
On steep mountian decents, I can certianly understand the need, but for those of us who ride on relatively flat terrain????
I can honestly say I am not a big user of brakes at the best of time, especially with engine braking on these sleds being so good, and I can't ever remember brake fade being an issue with snowmobiles, thus the question.
OTM
beeze455
Expert
my 2011 rotor has the fins.
natedawgedog
TY 4 Stroke Guru
yea the xtx does have the fans on the break rotor and I would think it would take off alot of the weight by doing that also. I wonder if they put those on there because some of there test riders ride the breaks so much it did some damage... but if your trail riding or really doing anything at all do you use the breaks that much to get them that hot? Idk about that! some of the break pads and rotors that Ive had on previous sleds had very little wear on them after 3-4 years, and the ones on my xtx still look brand new!
Off Trail Mike
Gone Riding!
Another reason for the fins might be the park brake. The caliper is pretty sloppy on the rotor, so I am wondering if it heats the brake disk under normal driving conditions as it bangs around. I seem to have alot of brake dust on my xtx, and as stated above, I'm not a heavy brake user.
Well, add the park brake to the list of items to remove, and replace it with MPI's delete kit.....more $$$'s
OTM
Well, add the park brake to the list of items to remove, and replace it with MPI's delete kit.....more $$$'s
OTM
beeze455
Expert
Off Trail Mike said:
I made my own parking brake delete. This has not seen snow yet.
Many simply remove it all together. I started looking at it and grabbed an old arctic cat brake lever with the parking brake on it. I found you could simply cut off the parking brake holder tab and bolt half Yamaha to half arctic cat right up. Shorten the Yamaha bolt for the hydraulic line and splice ac's red to the yamaha wire with a red line and the yellow with yamaha's other. I got this lever for 5 or 10 dollars and it is lighter then just removing the setup because AC's lever is all plastic.
ruffryder
TY 4 Stroke Junkie
beez455, that is awesome!!! Good job. Loosing weight, increasing functionality, and cheap!! My kind of mod!!
Beeze, can you take more detailed and clear pictures of your mod? Maybe start a new thread about it..
Beeze, can you take more detailed and clear pictures of your mod? Maybe start a new thread about it..
lund
Pro
Very nice, i like it. Yamie's idea of a park brake imo is abit of a JOKE.
I don't know if you lost much in weight but you definitely improved your brake system 100%.
Thinking i might just do the same...THX
I don't know if you lost much in weight but you definitely improved your brake system 100%.
Thinking i might just do the same...THX
Nikolai
TY 4 Stroke God
I'll remove the fins on mine this week and see what the weight savings is. I'm not riding much anyway so I don't care.
Another inexpensive weight loss on the drivetrain is the steel 10 mm bolt holding the speedo gear on. Replace it with a $7 aluminum bolt that's 1/3 the weight. It's a small loss, but any less rotating mass is a good thing and it all adds up. http://www.probolt-usa.com/Products/Individual_alloy_race_spec Need the M10x30mm, $5.94.
Another inexpensive weight loss on the drivetrain is the steel 10 mm bolt holding the speedo gear on. Replace it with a $7 aluminum bolt that's 1/3 the weight. It's a small loss, but any less rotating mass is a good thing and it all adds up. http://www.probolt-usa.com/Products/Individual_alloy_race_spec Need the M10x30mm, $5.94.
yukon yamaha
TY 4 Stroke Master
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I agreed I dont think that a light weight rotor will do much but if you could cut the weiht off those fins or even machine a light weight fin system that would be huge savings 
Off Trail Mike
Gone Riding!
Beeze, you're brilliant! That is the easiest and best fix for the brakes I've seen yet. I ordered an AC brake off ebay today.
Nikolai, thanks for trying the fin delete.....I might try too if I can figure out how to do it without destroying the rotor in the process. BTW, hope that limited ride time is temporary....
OTM
Nikolai, thanks for trying the fin delete.....I might try too if I can figure out how to do it without destroying the rotor in the process. BTW, hope that limited ride time is temporary....
OTM
beeze455
Expert
A good mod and i think it will work just fine. You have to cut most of the threads off the yammy brake bolt. I put some lock tight on the threads and tightened it in the AC assembly. Parking brake was very tight for me, but did work.
untested.
untested.
