Came across these mobile 2 piece mounts a while back.
Reminds me of the Pilot/Ody style.
The larger main portion MAY be another alternative?
Anyone out there have a pic with dimensions of their OEM mounts for comparison?
Diablo,maybe another poss option?

I wonder if Helm could make some Engine mounts out of the urethane they use for the a arm bushings?

http://www.atvbushings.com/index.html

If you get the durometer wrong on Engine mounts you end up with too much vibration the vibration transmitted to the frame can cause the frame to crack and fuel in the carbs to froth then you have fuel delivery problems, lean condition, poofkaboom etc.

Remember Lightspeeds Crackart and all his frame repairs his fix was to install the factory Engine mounts and plate. http://www.pilotodyssey.com/cpg/thumbnails.php?album=17

I am sure too soft of a mount can cause problems too?

Try to match as close as you can.

I don't even know what durometer is ???


http://en.wikipedia.org/wiki/Shore_durometer

I guess we need to test a new oem mount so we know what we need.

Any ideas anyone?

I can do a Shore A hardness (durometer) test on a mount here at work if it'd help (?). Just have to remember to bring a mount Weds or Thurs. Can prob do both the cylinder and the "washer" piece. Only takes a few seconds.

Shore A...take a specified cone plunger called a "Durometer" and apply the pointed end to the part with 8.06 N force to get a depth. This depth will be your Shore A hardness, aka: durometer.

ACTUALLY...randomly I have a couple of the washer mount parts in my truck. Let me see what I can do right now...

I took 3 readings and got 59, 50, and 55.9. Average that out and you get a durometer of about 55 Shore A.

Had to grind back a little bit of steel to get to the rubber since the rubber is recessed from the steel washers.

Here's the part:


Here's the machine:





Note: This is an estimate only. Part was in a box in my truck that was about 65'F, relative humidity 60-65% and was not able to acclimate to the lab's controlled environment. Proper method would be to test 3+ samples in "puck" shape with no steel liners.

Good thing is that this range of hardness is within the polyurethane spectrum and looks like that catalog page you showed offers a mount in 55A.

McMaster-Carr actually sells pourable urethane in 60A hardness (medium hard) that cures at 168'F. Most kitchen ovens will only go down to 170'F on the "warm" setting, so it'd work just fine. Not sure how many sets you could make with the $33 of 1-lb batch. In pourable form, it's kinda like pouring refrigerator-temperature maple syrup.

http://www.mcmaster.com/#catalog/119/3623/=mcl3lw

McMaster also sells spray cans of mold release. Search for it on their site.

You can probably make molds out of whatever, as long as its smooth and you can get the molds off.

Also, 3M Window Weld is spec'd at 55-60A hardness. Even simpler! This is sold at Autozone, O'Reilly's, Amazon, etc.

http://www.summitracing.com/parts/trm-8609?seid=srese1&gclid=CN7G7tr3z7YCFdNzMgod624AEg

What about the hardness of the main part of the mount itself?

Rand

Have to wait until tomorrow...

Cool and thanks this will give a guy something to shoot for or a ball park idea, I used the OEM mounts that I had refurbished or 'hoserized' with my 440 mount system at a certain RPM I get what I feel is a slightly excess vibration from the Engine that the Honda Engine never had, don't think its enough vibration that will ever do any damage but still notable, I got lucky guessing and suing the OEM mounts that were modified to give slightly less movement than stock.

Nice thing about the Pilot setup is the Engine and trans are married together so the Engine and trans floats as one unit and their is no worry about the clutch/belt alignment under loads or breaking, the FL250 and FL350 can flex between the Engine and trans slightly.

Thanks for the testing DMoneyAllstar if you see a chunk of silicone sealer laying around please test it also.

That's a shame you had to grind back your washers type.Thanks from all of us here.
It hurt just looking at the fresh pic.
Lucky it was'nt for one of our nuts!
Don't they have some sort of extension for the meter tip?
Now we just need the OEM spec/dimensions to see for a poss matchup.

I'll get you all some more info today, including...

Noon EST...
- Durometer test on the rubber mount cylinder

This afternoon...
- Sketch of the rubber mount cylinder w/ dimensions
- Sketch of the rubber mount washer w/ dimensions
- Interface dimensions
- frame mount spacing
- Engine case female ID
- Engine case female width

Then all of the info will be documented in this thread...at least for the FL350R.

Can't get enough free time for my buggy project, but I can do some quick measurements and feed my addiction. I, too, would like to find or make a replacement Engine mount set since some of mine look worn and aged, and I'd like some other options for the Rotax swap.

Wasn't easy to measure, but I got the same range of hardness on the mount bushing as I did for the washer...in the 54-57 shore A range. The bushing I used had a tear on the flange, so I just tore a piece off and tested it in a couple spots.

how about these.....i saw them on my TRX350.... they look like the same out side OD ...you would have to turn down the total length but might be easier that sourcing a non honda part????

http://www.ebay.com/itm/NEW-07-12-HONDA ... f9&vxp=mtr

Hi guys just thought i would put my two cents worth
Check out these mounts i found on ebay
Sorry i cant post the link (wouldn't have a clue how to anyway)
But just type in
Honda cb 1000 rubber Engine mounts
They look exactly he same to me and cheep
There must be a few of these bikes kicking around over there
I think i might by these now and put them away or youse them to make replicas !

Just found another couple of sets on ebay
Looks like even the honda cb700sc uses that type and by the looks of it they use 6 mounts on that Engine

These http://www.ebay.com/itm/Honda-CB1000C-C ... 8f&vxp=mtr

And

http://www.ebay.com/itm/CB700SC-Engine- ... 41&vxp=mtr

Just cut and paste the page link into your post to post a link

We need LEE to help us here with dimensions but looks like a good find even if you had to modify them.

Thanks

For the stock FL350R mount dimensions, see attached sketches.


And the following...

The Engine case...
- Mount Hole ID: 1.260"
- Thickness of leg: 1.045"

Frame tabs...
- Inner spacing: 1.556"

Note: all dimensions were taken on off one sample and samples are used parts.

Enjoy!!


4/19 EDIT: I added metric dimensions as well.