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Old 11-10-2011, 06:10 PM

Join Date: Dec 2010
Posts: 60
Default rsv4 technical update- fuel breather modification

I got my notice in the mail and according to Aprilia what it does is change the check valve used for the EVAP system and also modifies the check valve for the fuel filler cap and they believe this will stop the tanks from bulging/rippling.

Unfortunately, I've not had the Evap canister nor the check valve installed since I brought the bike home and my take has rippled on the left side.

Since I don't use ethanol I attribute this bulging more to the fact that the engine sits closer to the frame on the left side then the right.
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