exhaust joint gap

[rd400canuck]

Hi guys,

When I put all the bolts in there is this perfect gap all the way around the rubber joint. I checked the old ones the bike had and they are the same length as the ones I got from Yambits.

If I remove the bolt near the front of the muffler near the foot peg I get move it forward and close the gap as the hole for the rear mount near the wheel is oval and allows for adjustment. But... with the other bolt in it... there is that gap. The exhausts have 1A1 stamped on them so I think they are the correct ones.. I wonder if the headers are not originals.

I think the only way I can remember this is drill out the forward mount hole on the exhaust and make it oval as well so I can shift it all forward.

Anyone seen this before or have any ideas why I'm seeing it?

Also... those aluminum inserts that Yambits sent dont seem to want to fit into the mufflers... am I supposed to press them in?

Thanks guys