With most boats selling for msrp they don't have a lot of incentive to renew or make many changes.
Maybe with increased production capacity, if they don't sell a particular model there will be room for discounts.
The business model Yamaha has been following has been to produce just enough to allow dealers to clear out stock annually. It also keeps values up without discounting. They have done this over the past few years in other lines as well. This is very important with a seasonal product line.
Not that it is a good comparison, but the snowmobile industry has really been hit the last few years with some MFG's over producing and leaving dealers with piles of stock they have to discount in the off season. This is a poor business model that is forcing them to pull back inventory and liquidate through the high volume dealers. The dealers, many times, don't own the stock.
The vicious circle is the consumers are flocking to the volume dealers assuming those are standard discounts even further hurting the low volume dealers and killing overall value of the product. Now both Yamaha and Arctic cat have spring order only models, that require the consumer to spring order a new model year sled, as inventory will not be on the dealer showroom floors in season. This lessens the available inventory, increases profits on lower volume and cuts the cost of inventory for the MFG and the dealer. And used prices will remain up, as it may be the only option for consumers in season.
This is an extreme last ditch effort by the two lowest marketshare holders (Arctic cat and Yamaha) to reduce inventory and regain profitability. Yamaha has proven that their low inventory model with boats is profitable, and dealers are very strict on ordering proper quantities based on demand. Consumers do not expect to see steep discounts other than the sales we saw prior to new model release late in the season.
So don't expect these plant additions to turn Yamaha into a high volume producer, and change their model. It's just not good business for them. I think they are probably ramping up for increased demand, but I bet the model remains close to the same.
The launch of the 275 was smart and two-fold, by only producing what was ordered at first. Allowing them to ramp up production once the demand is proven, and when they can create the space to do it. There is is very good chance that they may be making plant changes to accommodate that new hull production. They may have had enough space to produce those initial orders, knowing that they could not go full production till the expansion took place. Producing a different, larger hull at the same time as all the others takes space.