Kill the vibration

[Bikeuser]

You need to have the bike frame mechanically isolated from the the motor. the motor needs to be isolated from transmitting vibrations. The rubber you use must be a sufficient hardness and thickness to hold the weight and dampen things.

 

[motor puzzle]

Anybody try this?

Just saw the below on ebay. I personally can't use it cause I have a chopper mount for the engine. Has anybody tried one of these. What about the type of rubber SORBOTHANE?

http://cgi.ebay.com/VIBRATION-KIT-M...hash=item160261267624&_trksid=p3286.m14.l1318

 

[Marktur]

This looks very interesting, and I spent a good 5 hours yesterday making my own "soft mount"...I have a bolt going through the frame in the front, so I made a sandwich of 3/4" flat fender washers, with 2 rubber grommets inside. I only have rubber bike tube on the back, and what's listed above looks pretty nice. I may try it.

The end result was that up to about 20mph or so, you don't even feel the motor, which is great, but getting closer to 30, there's a lot more vibration than before, I think. Maybe the rubber I'm using is too soft?

I also found rubber "corks" at HD, so I bought a couple of those, too, but didn't do anything with them. They're 3/4" tall, and maybe the same width at the top of the bigger end. I can drill them out, and maybe slice a bit off the top and bottom, and sandwich the frame in between...so that I'll try later on in the week because I have to go to Atlanta for business in the AM.

I'll post again then if I change up my install.

 

[ozzyu812]

Just saw the below on ebay. I personally can't use it cause I have a chopper mount for the engine. Has anybody tried one of these. What about the type of rubber SORBOTHANE?

http://cgi.ebay.com/VIBRATION-KIT-M...hash=item160261267624&_trksid=p3286.m14.l1318

:-/ "Bidding has ended for this item":-|

 

[OBX Fisherman]

I'm going to give these a try out. They thread right into the engine.

http://www.mcmaster.com/#item/9232K15

I'll just need to fab a small bracket to weld to the frame to support them. I hope they won't tear. Only time will tell!

 

[fastboy9]

That looks quite a pretty good solution, you need a substantial barrier between the metal on metal. Looks pretty good to me, you would have to be careful to put as little tension stress on the rubber as possible though.

 

[Cordogg]

can any one reccomend a good type of rubber for dampening? any experiences from using a flimsy bike tube up to some type of hard rubber?

 

[CorpralFever]

nice

I think its nice. but I was thinking when the spring is compressed by vibration or hiting a larg pot hole there would be for a split sec a gap ether at the top where head of bolt meets the mounting plate or at bottom were bole meets frame I think I would and a nut and washer under plate forceing the gap to go to bottom and then add a very small spring there just under frame so when this happens the nut at bottom won't slam against frame what you think

 

[CorpralFever]

Hi again sorry about my spelling in my above post but I think you know what I mean. LOL the problem with trying to make a little cash from your invention is that most of us could fabricate our own just by looking at a pic but if you made it cheep or better yet part of an upgrade kit then I think you would have a chance my friend just made a great spring loaded tention pully for the chain I will get him to make me one and post a pic its supper smooth and if your chain is a little jumpy from hole in sprocket being a little off center it takes care of that too LOL

 

[fastboy9]

can any one reccomend a good type of rubber for dampening? any experiences from using a flimsy bike tube up to some type of hard rubber?

How about, getting rid of the aluminium mounting blocks and making them out of a chopped up rubber brick, the type you use when you learn to swim. Not sure if you all have those sort of things in america, they look like this: http://www.lifesaversdirect.co.uk/catalogue/browse/pid/142/

Fastboy