This is a follow-up to my original post concerning fitting the GIVI top rack and side racks to a 919 equipped with Sato exhausts.
A quick look at how the Satos are attached to the 919 shows the problem: check out Michael Wheeler's Sato installation page inside www.919.org/sato
. Scroll about halfway down the page, and take a look at the exhaust mount bracket supplied by Sato. You will see conspicuous differences in how the Sato attachment set-up differs from stock.
On the stock exhaust system, each exhaust simply hangs from the upper hole. The Sato, however, attaches to the bike sub-frame at this upper hole, but uses a second hole beneath it to hang each exhaust canister. Additionally, the face of the lower fitment point is angled, whereas the stock junction between frame and exhaust hanger is flat.
So the stock GIVI top rack won't work here for those two reasons: the "hang point" of the Sato exhaust is too low to use the hole drilled in the rack as supplied by GIVI, and the stock attachment point on the GIVI rack where the exhaust is connected to the bike is vertical while the location it needs to go to connect to the Sato exhaust mount bracket requires an angled contact face.
The photo below shows the end of the stock GIVI top rack rail that attaches to the exhaust mount. The slight bend in the bracket is normal: it allows the bracket to pass over the top of the silencer.
The next photo shows how the end of the bracket needs to be angled out to mate properly with the Sato mount. I used a hammer.
Creating that angle solves one of the fitment problems. The other problem is the GIVI-supplied hole to bolt the rack to the bike's sub-frame is too high for use with the Satos. I drilled a 3/16 inch pilot hole where I wanted to drop the bolt hole.
I enlarged the pilot hole to 3/8 inch.
Once the angle of the end of the GIVI top rack was modified and the hole for the attachment bolt was lowered, installation of the rack was straight-forward and normal. The next photo shows the top rack and side racks on the bike.
Fitment of the luggage reveals no issues. The modified rack system does not rub the bike's frame or bodywork anywhere. There is also plenty of clearance around the Satos.
There must be more than one way of adapting the GIVI materials to work with the Sato exhaust. I'm satisfied that this way will work for me.
For individuals having other aftermarket exhaust systems, inspection of how the aftermarket exhaust hangers attach to the bike's sub-frame and comparison with the GIVI rack geometry will most likely reveal a way to hammer, drill, or cut the GIVI unit into a cooperative posture.