hi,are bike engines rubber mounted in anyway in the car chassis,looks from some photos i've seen that maybe a bit like metalistic suspension bushes,cheers wayno!!

depends on the manufacturer as to wether it is solidly mounted to the chassis or poly bushed between cradle and chassis, no right or wrong way

Rich

mines poly bushed BTW

As recently discussed my ST1100 is attached to the engine cradle via polybushes and then the cradle is attached to the chassis via RS2000 engine rubbers.



The ST1100 is a heavy torque old engine so it's probably sensible. Usually BECs are just polybushed....

Those RS2000 engine rubbers are quite heavy BTW!! The two weight about 1kg!!

I used Landrover engine bobbins - really stiff so they limit movement more than most.

The 05 r1 in my stuart taylor chassis is mounted solid, no rubbers or bushes.

If you're using a gear linkage (as opposed to a cable) then you really want to mount the engine quite solidly otherwise you could start getting imprecise gearchanges with the engine moving around under acceleration etc, which can lead to all sorts of nasties happening in the gearbox.

My blade engine was partially solidly mounted with a couple of poly bushes as well, the R1 is completely solid.

Isn't that really noisy? I would have thought you need at least a little bit of isolation or the vibes will be horrible.

Makes bu**er all difference, all BECs vibrate like mad regardless!

If you think about it though, most are solidly mounted in the bike to become a stressed member of the frame, and the bikes don't suffer from excessive vibrations.

Bikes are alloy frames which don't transmit vibrations like steel does and also the seat, footpegs, handlebars etc are isolated, if you rubber mount the engine then you must also rubber mount everything else as any solid connection will make it sound like a bag of hammers

Cheers
David

Ive not ridden a blade/R1 bike to compare directly, but a bike is a lot lighter and the rider sits a lot closer to the engine with their body touching parts such as the tank and side panels which aren't really isolated, so I'd be suprised if you felt engine vibration significantly less on the bike than in a car.

What I can confirm though is that having had my engine solidly mounted for 3 years or so, despite having bare GRP seats and bare ally panels I haven't found the vibrations to be a problem at all, you don't feel the vibrations when driving, nothing shakes loose, nothing has broken from vibration fatigue and its not noticably different to other BECs Ive driven / been in that might have used rubber mounting.

cheers
Chris

[Edited on 26/1/08 by ChrisGamlin]

I'm with Chris. Solid. No question about it! It's solid mounted in the bike and, as Chris said, you have distance to separate you from any vibrations, although mine is right behind me!

Wyn