Rubber mounts

Because most new people barley know how to put a engine on there bike properly and end up having broken studs or engine falling off, thats why its recomended to solid mount the engine to the frame,plus even if you use the rubber to keep the vibrations out of the frame it will go to the mounts causing problems. I do like using rubber cause i know what im doing, but i just don't reccomend it to anyone.

2door is right about NOT using rubber mounts. I originally had thin strips of really tough rubber on my rear mounts and snapped a rear stud off in the engine casing. Fun ends there. I wound up breaking a screw extractor off in the hole and ultimately buying and replacing both engine case halves. Mechanical ability better be one of your top personality traits if you dare adventure into "rubber mount land"
Tim

I am in agreement with 2door. if you were to take a poll of forum members that use rubber mounts and those that mount directly to the frame, direct would probably be the favored response. Sure there are a few that have successfully mounted their motors with rubber mounts but that is after some serious creation/modification. Yes there is some vibration, (annoying as it is) it is the nature of the beast. and as 2door stated you can rubber mount the motor as much as you want all that is accomplished is transferring the vibration into the motor. possibly creating a new point of failure.

There are far more safe mods that can be made to the bike itself to help with vibration, like filling the handlebar ends with socks. Point being made, Rigid mounting the motor to the frame the way it is designed; is surely the best bet.

That is the opinion of this MB builder/rider. As I have said before, Opinions are like A**holes Everybody has one some just stink more than others.

my opinion, based on experience, is solid. i mean solid mounts. i also mean that my opinion is solid, and highly respected by myself.

what i'm trying to type, is after trying both, solid is the best.

also, get rid of vibrations on the bike itself. make sure everything's tight with no rattles, don't use knobby tires on the street, get a good saddle, etc. then the vibes will be distributed throughout the bike and won't be isolated in one place, making your whole ride smoother.

and that's some solid advice for ya...

I'm going to glue my next engine onto the frame with silicone!
I'll never have to worry about breaking a mounting stud!






Just kidding..........

gearnut...dont use silicone...if you use Goop...you can coat the mounts the night before mounting...it will have a slite rubber feel to it when dry...than put fresh coat on and mount the engine...i even go as far as putting goop on the tops of the nuts and bolts when everything is secure...no vibration and nothing loosens up...goop is a impact adhesive...whats in it ???...i put the GE 1 silicone in the frame and handlebars...everything has been tested...work related....great products...Dennis

With all due respect, I was joking about siliconing the engine into place. I would not trust that for a second. I want the engine so secure it's as though I welded it into place.
I am coming up with a custom solid front mount for this build as the frame has a 1 1/2" diameter down tube. So far the commonly sold wide front mount I have fits poorly.
I have all ready modded the rear mount to fit the frame perfectly.

yea i figure you were...but i'm not...i just tighten everything down as usual except for the goop...ha...Dennis

Should you put anything on the frame or just metal to metal? By anything I mean a thin layer of electrical tape, maybe paint a thin coat of plasti dip, anything to protect the frame?

Got it. I will just do one layer of the tape.

A method of protecting the paint under the motor mounts? No offense, but I doubt a layer of electrical tape will help much in the long run.... it will help to prevent scratches during assembly and that's awesome - but given enough time, heat, pressure and use and it'll either chafe through at the pinch points (mounts are never quite a perfect fit), and/or happily pull the paint off later when you pull the motor.

I'm not sayin' to not try it - I'm jus' sayin' don't hold yer breath heh

Something I tried with my last build (others have tried it too - not my idea) was to cut small squares of thin leather (workglove actually) and taped a square to each mount surface itself (prevents movement during assembly). This was not an attempt to make a "soft" mount or isolate vibration as when the leather compresses it becomes rock-hard (requires rechecking mount torque) - but jus' another attempt at protecting paint as I've a shiftkit and you tension the secondary chain by raising the motor.

While it looked stylie and didn't contribute to movement - it still pulled paint off as the pressure happily embedded the leather into the paint *shrug* I'd say if you've a motor permanently fixed in place to not sweat it, the paint under the mounts may be doomed - but you'll not see it. If it gets to the point of corrosion/rust - you'll prolly need a new paint job by that time anyway

OK, I respect all suggestions posted on this form, with that said I wanted a Manic Mechanic motor mount(Not Happening!) so have decided to try some custom made mounts. My frame is aluminum, and have bought four blocks of aluminum that will be milled for proper fit. The two halves that clamp around the bike tube, I figured would benefit from having tough rubber in between, like the Manic Mechanic motor mount. In everybody heres opinion, is this wrong, and should I leave out the rubber, and mill the two halves the exact size of the bike tubes better? I love this forum!

I sliced a bicycle inner tube (standard thickness not a HD one) and wrapped it once around the frame and taped it together to hold it in place... worked just fine and keeps my frame from getting chipped up.