Yamaha has made available accessory rear heat exchangers for their 4-stroke models (all except Phazers). These accessory heat exchangers increase the cooling system capacity and are recommended for units that are operated in marginal snow conditions.
Each kit comes with mounting instructions, templates and required rivets. The kits are not covered under warranty, so the kit and installation costs are the responsibility of the sled owner, but Yamaha has made these kits available at a special reduced price to maximize owner satisfaction. The cost of the kit for 121â€ and 144â€ 4-stroke models (8ET-RHECR-KT-00) is only $41.90, with the kit for 136â€ and 151â€ track lengths (#8EP-RHECR-KT-00) is only $85.29. See you Yamaha dealer for more details, to order a kit or have it installed.