F4 312R Exhaust looks a little low at the back - MVAgusta.net
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post #1 of 17 (permalink) Old 07-16-2013, 04:12 PM Thread Starter
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F4 312R Exhaust looks a little low at the back

I did the the drilling mod on my pipes recently and now with the exhaust back together and back on the bike, I can't help but think the tips look a little low at the back.

I saw an F4 1000 S today and the gap above the tips was definitely a little smaller.

As far as I can see i've but the tips back on correctly and the riveted them through the original holes, its as it the whole silencers and tips are lower.

The 'height' of the silencers is dictated by the 'hangers' that drop down from the sub-frame. These are correctly attached.

The seam line running down the outside of the silencers isn't quite parallel withe the bottom of the seat unit plastic, with the gap increasing by about 3-4mm by the back of the bike.

What has happened?

I have photos, but I got banned last time I posted any, so i'm getting my post count up first this time.
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post #2 of 17 (permalink) Old 07-16-2013, 04:12 PM Thread Starter
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post #3 of 17 (permalink) Old 07-16-2013, 04:20 PM Thread Starter
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post #4 of 17 (permalink) Old 07-16-2013, 04:26 PM
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I've found you can make small adjustments with the hangers. Slight twists will raise or lower the exhaust. Make sure you loosen the plate under the exhaust so they can move a little easier (for alignment). Also, you exhaust does look a little low, but you don't want to get it too close. Those tips get pretty hot and I've heard they can melt the paint or plastic. Also, remember that it will change slightly as it heats up and cools down (expansion blah, blah, blah).

Best of luck!

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post #5 of 17 (permalink) Old 08-17-2013, 06:42 AM
Still can't figure this out. Any other ideas?
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post #6 of 17 (permalink) Old 08-17-2013, 06:56 AM
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Originally Posted by lloyd_christmasMV View Post
Still can't figure this out. Any other ideas?
Post a picture with the seat raised...

joe
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post #7 of 17 (permalink) Old 08-17-2013, 07:15 AM
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post #8 of 17 (permalink) Old 08-17-2013, 08:16 AM
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The distance from seat to tail pipe is held by the "dog bone" looking device. I'd try loosening both allen head bolts (one is through the hole in the heat shield) on both sides of the exhaust, push up on the tail pipes, and re-tighten.

It is possible, I suppose, you are missing a rubber insert in one or the other sides.....

I can see the top one on this side, but the others you will have to check.

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post #9 of 17 (permalink) Old 08-17-2013, 08:18 AM
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It does look too low indeed. As if the angle is not right. Maybe you should look if they go far enough in the midpipe...

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post #10 of 17 (permalink) Old 08-17-2013, 08:21 AM
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There is no mid-pipe on the 312R. The whole of the exhaust is one welded piece up to the slip on. You could try pushing the slip-on father onto the exhaust pipe and that would move the slip-on forward creating some angle on the "dog-bones" and raising the tail pipes.

There should also be two metal inserts in each rubber mount...one outside and one inside.

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'07 F4 312R, '10 B4 1090RR, '15 B3 800RR
'07 Ducati Monster S4Rs, '07 Ducati Monster 695
2010 Harley Davidson Ultra-Classic Electra-glide CVO FLHTCUSEBLK
'63 Honda C100A Cub
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