2007 EC300 loose engine

[Col]

Hi,

I have a 2007 EC 300 that has a lot of movement at the mounts where the swingarm bolt passes through the engine.
I know there are hat type bushes that push into the swing arm but should there be anything similar that goes into the cases?

Appreciate any help

Cheers
Col

[Davehuge]

Hi Col

No there isn't anything that goes inside the engine cases.

See the attached image taken from the Parts List, I've arrowed the two 'Swingarm Bushing' part 43, I think that's the part you mentioned. Are these fitted correctly?

What about the the other parts I've arrowed, part 9 'Right Rocker Arm Support' and part 12 'Left Rocker Arm Support'. Are these fitted correctly? The swinging arm pivot bolt passes through these. See the dotted line I've marked on the 2nd picture.

It should be a snug fit when you push the swinging arm into place, with maybe just a bit of movement, then once you tighten the swinging arm pivot bolt to the specified torque, the play should disappear with no movement possible of the engine and no sideways movement of the swinging arm. The swinging arm should pivot nice and smoothly on it's bearings as if the suspension was moving.

All the best, Dave.

Swing.jpg

Dotted.JPG

Here's a photo with the Right and Left Rocker Arm Supports arrowed. These also act as spacers, so if they're not in place you will have too much play.

pivot.jpg

[Davehuge]

Also...

The swinging arm pivot bolt usually has a flat on it's right side end, stops it rotating, check this is in it's correct position.

flat.JPG

[Davehuge]

Are you in the middle of refitting the engine and swinging arm back into the frame or have you just suddenly noticed there's movement?

[Zman]

Is it possible that you do not have the original engine or frame? The bikes before 2000 or 2001 had engines and frames that used a smaller diameter swing arm axle. I also heard the bottom engine mount was relocated after 2006.

I put a 2004 engine in a 2000 frame one time and needed to machine some aluminum inserts to put into the engine case to take up the gap for the smaller swingarm pivot shaft. I found that a Maglite AA flash had a correct interior diameter for the shaft but the outside needed to have a little material removed to fit in the cases.

I guess it is also possible that if the bike was ridden with a loose swing arm shaft that it could wear the engine cases and make them a loose.

[risk74]

The rocker arm supports previously mentioned have a habit of wearing out on high mileage/hour bikes. I've had to buy several replacements over the years.

You definitely want to solve this problem before running the bike any further. I have an engine that actually has a wear hole in it because these were not replaced in time.