Motor mounts

aksnopro · Mar 13, 2012

See what im talking about that motor mount looks like its got a wear mark of bottoming out, when i land a jump i swear i feel a small clunk sometimes like my motors moving but might just be feeling this motor mount hitting the chassis??

Is this motor mount and wear mark on the bulkhead normal or is that motor mount loose?

Cat Bandit · Mar 13, 2012

Looks to me to be moving around, unless there is a little kid running around drawing black circles next to your motor mounts

aksnopro · Mar 13, 2012

hahaha or is it the rubber touching it when it flexes down from landing a jump? we will see what cat says tomorrow.

i fell off the sled with my tether on, the tether was slightly wrapped around the pull cord, pulled it out just enough to grenade my recoil..... lovely.... and piss *** poor spot for the tether cause i cant tell you how many times i have unwound it from the pull rope handle...

first for everything! lol

-Aksnopro

Gxf800sphc2012 · Mar 13, 2012

Cat Bandit said:
Looks to me to be moving around, unless there is a little kid running around drawing black circles next to your motor mounts

Id be interested in finding out if there is a stonger Durometer rubber. correct me if i said that wrong. But has anyone bought, made, or installed different motor mounts instead of messing with the TCL

Going West · Mar 13, 2012

Gxf800sphc2012 said:
Id be interested in finding out if there is a stonger Durometer rubber. correct me if i said that wrong. But has anyone bought, made, or installed different motor mounts instead of messing with the TCL

You mean kind of like this.

Kbakbmr · Mar 13, 2012

I put a 70 Duro kevlar mag side motor mount on my sled. My primary went from moving about a 1/4" at idle to not moving at all. There's a little more vibration transferred to the bars at idle but once you get on it the vibration is gone. Definitely helped

Going West · Mar 13, 2012

Stock the motor flops around like a dieing fish. I also added a heavier durometer to the TCL and the rear mag mount as well. Then I tightened all the bottom mounts which were all very loose. Made a big difference in how much the engine moves but I do have more shake and vibration at idle now.

9071000 · Mar 13, 2012

loose mounts would explain the change in deflection.very good point.if the moter is flooping like what i see here that also might explain wy some are blowing belts and some not.i will be taking my skid plate off and looking.

geo · Mar 13, 2012

Easy to see if you have one of those inspection cameras to look at your piston wash.

I have the same marks but no clunk sounds (yet??).

I went to the trouble of checking my C to C and distance of the TCL to the cross-member every ride for while to see if things changed. They did not on my sled.

I watched some very quality looking engine and TCL stabilization products and mods go across this screen this winter. I don't hear or see a consensus yet.

CatRpillar · Mar 13, 2012

Isn't it supposed to be in contact when it's static like that? Are others who replaced theirs finding them looking like that too? If that's the case I must be missing something. I'll have to get the scope out and look at mine.

KMMAC · Mar 13, 2012

Send

Going West said:
You mean kind of like this.

Ya,, send those to cat..............

aksnopro · Mar 14, 2012

Nice work!

did them motor mounts help your belt temps?

-Alsnopro

RKT · Mar 14, 2012

Going West said:
Stock the motor flops around like a dieing fish. I also added a heavier durometer to the TCL and the rear mag mount as well. Then I tightened all the bottom mounts which were all very loose. Made a big difference in how much the engine moves but I do have more shake and vibration at idle now.

Where can you get the heavier durometer mounts?

Going West · Mar 14, 2012

Well Ive had a few PM's about the mounts I built so here's the deal.

I used two 60 duro mounts up front, Part# 0608-404 and I used two 50 duros in the back, Part# 0608-405 (One replaces the Mag side mount and the other replaces the TCL). The mount on the TCL needs to be machined to allow the bolt to be counter sunk into it and also for the proper thickness.You also need to take some measurements to make sure it is pressed into the TCL the proper distance so you wont effect alignment.

Now on the front mounts I used 2.5 by 3/8 flat bar aluminum, (in retrospect its a little on the beefy side) Then you just need to machine a 2" hole to hold the rubber mount, they are interference fit and the easiest way to put them together is to put the mount in the freezer and the aluminum in the oven at 300, then if your fast they will slide right in. To mount these to the motor you can either fab up something out of angle aluminum or buy the front mounts off of the M8's Part# 0608-549.

This makes a huge difference in how much movement there is (its now comparable to my m1000 with extra mounts) but it does transmit a lot more vibration at idle. I dont have any definitive answers as to how it effected belt life b/c of some motor trouble on the last trip, belt temps are still very high and I did pull some cords on one belt, but it was in rough shape before hand.

Devilmanak · Mar 15, 2012

I am confused, is there supposed to be a gap between the mounts and aluminum?
I have had a clunk since day one, when coasting into choppy corners on teh trail. I thought it was a loose track smacking the tunnel, or something sloppy in the suspension/ski. Guess I should look at motor mounts. .

aksnopro · Mar 15, 2012

me too i notice it when i hit hard on a bump beating down the trail. something seems loose up front.

if i let off the throttle and hit the upside of the next rut ill hear a brutal sounding clack i feel it in the chassis on my feet and it feels like its coming from up front.

that motor has to be moving 1/4 down in order to hit that aluminum.

kbak did you pickup that motor mount from anchorage suzuki?

-Aksnopro

CatRpillar · Mar 15, 2012

Like was stated early in RKT's big thread on blowing belts, check the motor mounts. That spacing just doesn't make sense. Those motor mounts shouldn't be set up like bumper stops. And there's no way the TCL can control things as designed with loose motor mounts.

Going West · Mar 15, 2012

I still have that same noise and i know my mounts are tight. Mine happens when i get in and out of the throttle on a hard big pull. Sounds like metal on metal bang/clang, at first i thought it was the secondary touching the clutch cover but that wasn't it, still cant find the cause.

Devilmanak · Mar 15, 2012

I wonder if that is the nasty sound my clutch was making when moving the sheaves around? Or if your clutch is banging liek they do when going from forward to reverse?

Going West · Mar 15, 2012

Devilmanak said:
I wonder if that is the nasty sound my clutch was making when moving the sheaves around? Or if your clutch is banging liek they do when going from forward to reverse?

Its not the clunk you get from the rollers leaving the ramp. Different noise, more metallic, at least mine is.

Motor mounts

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