Theoretically, fitting such mods should not directly affect you warranty; it certainly shouldn�t invalidate it. The only thing that a dealer/Yamaha could quibble with, if you needed to make a warranty claim, is if the mod/accessory could be attributed to, or was the direct cause of the problem. For example, if you fit DNA Stage 3 filters and then melt your piston because it�s running lean, then you won�t get any joy with the warranty. But fitting DNA filters isn�t going to prevent you making a legitimate claim, let�s say if your regulator/rectifier packs up or your spokes go rusty.

If you fit a Kev mod, O2 controller, DNA filters and an exhaust, assuming they are properly fitted and tuned, then you shouldn�t have a problem. It is though, as you mention, down to individual dealer�s discretion and what their take is on any problem is should it arise. Some dealers are good with things like this and others are quite draconian. My suggestion would be to go and have a chat with yours and ascertain how they feel about such things.

You could of course keep all the stock parts and refit them if you did have a disaster, then no one would be the wiser!

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