| Author | Message | ||
     Blackm2 |
Ok, since most of the failures come from the shearing of rubber along the bottom rim of that mount, what about this? A washer that reduces the shearing load along the bottom rim. The thick washer that normally resides there will still contact the bottom of the shaft. I can make it happen with my hand strength let alone 60ft/lbs It does not take up any extra room. All the correct washers are in place, just that one washer is supporting the bottom of the mount. Worth a shot?   | ||
| Buellistic |
Remember that the front motor mount HANGS from this isolator ... The SMALL spacer would go in first and then the LARGER washer on top of it ... | ||
| Blackm2 |
No I understand that, but if the small washer went first there would be no support for that bottom section of rubber. As I stated above, and you can see in the top photo, there is very minimal distance from the shaft to the washer. So the middle shaft will still bottom on the washer that goes in that position anyway. | ||
| Buellistic |
Picture is a little deceiving, so give it a try and let us all know ... | ||
| Gowindward |
I think once the load is applied to the top of the isolator it will simply push the steel insert sleeve down and your washer moves with it and doesn't give the support you are thinking it does. | ||
| Blackm2 |
Here it is installed, torqued, and weight of the engine on it. I ran it and it seems solid, but still allows plenty of movement. I'll leave it, time and mileage will tell. FYI-the washer is from my '95 Grand Cherokee 4x4 front wheel bearing/axle. I didn't modify it.   | ||
| Dave_02_1200 |
Looks to me like it might help. What size and thickness are the washers? Keep us posted. Thanks, Dave | ||
| Limitedx1 |
but that part say do not remove!!!! the HD police are gonna come looking for you! lol | ||
| 5liter |
Snubbing washer??? http://www.vibrationmounts.com/RFQ/VM07013.htm (Message edited by 5liter on March 05, 2009) | ||
| Blackm2 |
Yea exactly Jim. In the other isolator thread where the link was to Barry, the one page that had the mount similar in design said that it was "fail safe with a snubber". I saw that washer sitting there in my garage this morning and it fit perfectly. I figured.. What the hell? I rode it this evening and sat there and watched it after the ride, and it seems to do the job, like I said, time and mileage will tell. Dave- Outer diameter is 1.6 inches Inner diameter is 15/16 of an inch Thickness is 5/32 of an inch YOU can convert that to metric  Oh yea, guess I'll be frequenting the XB forum too, wife just rode her ALL BLACK 2009 Xb12Scg home tonight. Looks like a mini-bike next to the Cyclone! | ||
| Joesbuell |
I think you may have the solution there Dave I'll try it on mine too  | ||
| Natexlh1000 |
So the idea here is to limit the travel of the inside? | ||
| Blackm2 |
I don't think it is so much limiting movement of the inside. The majority of the failures seem to be on the front of the bottom of the isolator where the rubber is attached to the outer metal ring that protrudes through the bottom side of the frame. The large extra washer I think will just help support the outer perimeter of that rubber, slowing down the shearing process, hopefully. | ||
| Riviera |
Would an iso with the lower half rubber held captive in a shell work? Like this piece turned upside down and with a mounting flange? Lot a "ifs" here!  | ||
| Riviera |
From here: http://www.vibrationmounts.com/Store.asp?Page=Prod ucts7.htm | ||
| Blackm2 |
Yea that would probably work great if it was built out to the right specs. Might be tough to tell when it did go bad but excessive shaking is always a good indicator. | ||
| Phelan |
I just ordered a replacement iso; I may have to try this as well. | ||
| Blackm2 |
I think it will work out well Ross. The weak link seems to be the bottom portion of the isolator. The D-washer supports and distributes the load on top, The only un-supported aspect is the bottom half and it seems a majority of failures are ripping where the metal ring is vulcanized to the rubber along the bottom. So there is a shearing force happening around the center shaft and the unsupported rubber on the bottom. Many seem to be going with the ...79D Harley iso, drilling it out and flipping it over so the flat washer is supportive on the bottom. Supportive above and below I think will be the key as long as the motor is still riding on rubber. | ||
| Sleez |
similar to what is in the JP catalog, 2009 pg 522. http://www.jpcycles.com/Search/ProductDetail?sku=431-385&N=2761610%202761612%2028002076%2028002146&Ne=72635&Ntk=All&Ntt=&Ns=image  description; • Finish: Polished• Material: Billet Aluminum• Sold in Units: Each• Brand: Hotop Designs®• Made in the USA: fitment; 1995 - 1996 Thunderbolt S2 1995 - 1996 Thunderbolt S2T 1996 - 2002 Lightning 1997 - 2000 Thunderbolt S3T 1997 - 2002 Cyclone 1997 - 2002 Thunderbolt S3 1998 White Lightning from the catalog; "2-piece billet aluminum disc kit restricts excessive movement of the engine in the motorcycle frame. Especially useful for big inch motors. Installs with OEM hardware. Note; motor mount and bracket not included." |
