Differences between W arm H arm

I was measuring 15 inches center to center on both W and H arms. My riding style is quite agressive trail and a little off trail, I have oem mtn viper drop brackets for the rear.
 

Have my new mounts all fabed up and mounted as per the measurements. When i was putting the suspension together i now know that the front lower shock mount from my 121 skid will not work with the new 144 rails. I see they are different on the parts sque but was hoping to make it work. The shock binds on the bracket and has very little movement at the pivot point. So i guess i need a lower mount from a mountain sled aswell.
 
problem is not the bracket, its the location of the bracket in relation to the rails. it needs to move back on the rails.

problem is how much? when i first started doing these conversions on the 97-99 mtn maxes as well as a few shorties, i was moving that mount back a full 5". not needed in your case with the 144 rails, i would guess half that distance.

couple things come to mind as to *** kickers at this point will be the length of the front shock assuming your using the srx shock. its shorter as the srx had less travel than the mtn sleds. next will be finding the sweet spot on the rails to mount the shock bracket.

i would do a mock up as best you can before drilling. use clamps, blocks, wedges, or whatever it takes to hold the lower mount in a position prior to committing to a hole drilling at the rails. a little swiss cheesing on the rails wont hurt, theres plenty of meat there, but you dont want to make it look like a full on trial and error attempt.

your lower mount will work, its the location. at least it has worked for me on similar projects relocating. back when we didnt have access to longer rails, it was all done by moving stuff on the rails and in the tunnel and adding rail extensions. your solution is in front of you, just need a little more r&d.
 
Everything i have is long travel from a viper. The 144 rails and H arm should work with a viper shock, should it not?


snowdad4 said:
problem is not the bracket, its the location of the bracket in relation to the rails. it needs to move back on the rails.

problem is how much? when i first started doing these conversions on the 97-99 mtn maxes as well as a few shorties, i was moving that mount back a full 5". not needed in your case with the 144 rails, i would guess half that distance.

couple things come to mind as to *** kickers at this point will be the length of the front shock assuming your using the srx shock. its shorter as the srx had less travel than the mtn sleds. next will be finding the sweet spot on the rails to mount the shock bracket.

i would do a mock up as best you can before drilling. use clamps, blocks, wedges, or whatever it takes to hold the lower mount in a position prior to committing to a hole drilling at the rails. a little swiss cheesing on the rails wont hurt, theres plenty of meat there, but you dont want to make it look like a full on trial and error attempt.

your lower mount will work, its the location. at least it has worked for me on similar projects relocating. back when we didnt have access to longer rails, it was all done by moving stuff on the rails and in the tunnel and adding rail extensions. your solution is in front of you, just need a little more r&d.
Click to expand...
 
should. where is the lower shock mount located on the rails? i would guess it to be at around 18" in a straight line off the rail tips with the limiter strap bar at 4 5/8" back from the rails tips. this off my old notes back when i took really crappy notes.
 
snowdad4 said:
should. where is the lower shock mount located on the rails? i would guess it to be at around 18" in a straight line off the rail tips with the limiter strap bar at 4 5/8" back from the rails tips. this off my old notes back when i took really crappy notes.
Click to expand...


Sounds about right. have to check tomorow.
 
just did a quick check on the fische and the 01 srx and 03 mtn viper share the same lower front shock mount. pt # 8EA-47418-00-00. you should be good there.

nothing flipped over or out of place? your using the mtn h arm? front mount of the skid is 8 7/8" back from the flat edge of the driveshaft to the center? what limiter straps did you use?

i can remeasure one of my mnt tunnels tomorrow if needed.
 
is there something wrong with the stock rear exchanger? thats what i would use, you have it. you will just need some longer hoses for the tunnel extension. depending on which extension your using, mtn max or mtn viper hose covers make for a clean look if you dont want to cut up your stock plastic bumper/hose cover. i have pt numbers for cheaper, well fitting hose covers as the oems are hard to find used and a bit on the pricey side new.

bring us up to speed on your concerns with the extension.
 
Got the extension ready to mount, but from what i read on other posts, my srx rear coolers wont work with my mountain viper tunnel extensions
 
take a closer look. i think its the angle of the hose fittings that makes it tight in the extension. once its in there, it will work. use a die grinder or sanding drum to egg out the extension a bit, the hose covers will cover the alteration.

what are you using for a rear bumper?
 
I was going to use my srx bumper i see there are two holes on either side of the back of the extension, did the mtn vipers have different bumpers?
 
the mtn sleds use an exposed bumper, mtn max and mtn viper are the same. your srx should be covered by the bumper cover and may not fit the extension if you utilize the srx's plastic cover to hide the hoses. in fact, i know it wont, its too short to cover the longer hoses needed for the extension.

your bumper may work, the srx cover wont look right in my opinion.
 
i have mountain max hose covers, trial fitted everyting tonight and it seems to work. Granted i may look into getting a factory tunnel extension off of a 01-02 mountain max so the paint will match. I painted the mountain viper extension to match the tunnel but i dont love the results.
 
yamaha usually gives you a year or two on the color hold. if your going for match for your srx tunnel, more than likely that wont happen unless you run into some old stock.

as yamaha keeps reducing parts supplies for the 2 strokes, options for paint are reduced. more concern with bottom line in the corporate structure than color matches. cant really blame them. i have been happy with the last few raw aluminum ones i have done from yamaha. they match really good once you spend a few hours stripping the paint off your existing tunnel.
 
Stripped tunnel, Air craft stripper is awsome stuff. Have the suspension trial fit in to the new mounts,with one exception. Is the rear Axle narrower on the mountain sleds to accomadate the drop brackets? I see there are two different axles available off of the 2003 mountain viper parts fishe. Just curious as to options before i cut up my short track viper axle.
 
Ive read a post about cutting 1/2 inch off each side, thats probably my only alternative to finding a shorter shaft.
 
how long is your stocker? your referring to the center shaft with the large bogies along with the shock?

i can measure up a mtn shaft and let you know. i would have guessed them as being the same if your using oem brackets as the tunnels are the same width as well as the bracketry thickness.
 
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