grey haired git Posted June 4, 2011 Posted June 4, 2011 Spurred on by the 02 mod success I have been looking at Yamaha Airbox mods. The usual way is to drill 75, 1/8th holes in the plastic surround. With my drilling skills I decided to try alternatives, I bought 4, 1/4in wide rubber tap washers and longer airbox bolts, cut three pieces of heavy duty foam and fixed them to the inside of the cover to make sure the air filter was still pushed flush to the back surround, put the washers between the chrome cover and the black base and tightened down. This leaves a 1/4 inch air gap around the whole of the airbox. Results... smoother running and best of all the sound is now superb with a real growling noise when accelerating. I realise that if riding in heavy rain you could get a problem but the major part of my riding is now fair weather so with a bit of luck I should be ok. After these two mods the bike now feels right, previously after riding the XVS650 for a few years the move to this machine was not what I expected with the hunting at low speeds and the lack of a smooth pickup on sharp corners and roundabouts. But after the 02 mod and air box, huge difference.
clarke Posted June 5, 2011 Posted June 5, 2011 Sounds like a good mod - I've been thinking of modding mine but reluctant to do a permanent mod so may well give this a try. Any chance you may be able to post some pics? Also if it's ok with you I may post this on another forum for others to use. Ride safe, Graham
grey haired git Posted June 5, 2011 Author Posted June 5, 2011 Hi Graham, no problem publishing elsewhere. Pictures as promised, they just show the foam on the inside of the cover to make sure the filter is still tight against the back surround. The bolts are 1/4 inch longer than original and the rubber grommets are 3/8 inch tap washers. The visible gap is only small but the sound is far better than normal. Hope the pictures are ok, first time I have uploaded images.
Moderator Airhead Posted June 5, 2011 Moderator Posted June 5, 2011 keep an eye on your spark plugs because this type of mod could cause lean running
clarke Posted June 6, 2011 Posted June 6, 2011 Thanks for the photos - looking good I think I'll give that a try this weekend... (I'm guessing there's no issue with clearance against your leg?) I believe the FI processor re-calibrates for the extra air but let me know if you discover any issue with the plug. Graham
Moderator Airhead Posted June 6, 2011 Moderator Posted June 6, 2011 It sounds like a very good idea instead of butchering the cover with holes, like was done extensively with the little DT's of yesteryear.
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