I just picked up a 05 450 SMR. Im doing all the normal service but had a question. In the manual it shows that after removing the filter box cover that there in another hard cover (throttle cap) that goes over the filter. Is that right because mine just has a filter no cover. Is that a normal mod, to leave that off? It looks like stock jetting and the pipe is stock so I wouldnt see a reason to leave the cap off.



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