The LiquiFires were always finicky... Ran great when they ran, but had issues with cooling, CDI's and later with oil injection. The Trailfires (Fan cooled) were very reliable and quick for their time. I had 6 Trailfires up until the last two years I've been seeling them off and buying newer Polaris sleds as our snow season start to improve. They are all Twins both liquid and trails. JD bought the rights from Kawasaki for the designs, and they ran Kawasaki engines in the Trailfires. I rebuilt the engines and completely went through each one as I bought it and then never had a day of trouble with them. I built lowering(lift) plates to give them more ground clearance. If you learn on a Vintage (read no suspension
) then any newer sled is a dream especially on a chiseled midwest field. As far as parts Dennis Kirk had a lot of parts and have been clearancing out huge quantities lately. Other good source is WWW.MFGSUPPLY.COM
great prices. Nice originals or quality reconditioned Deere's in the Midwest can fetch up to $1000. plus still. If you like the sled they are a good sled. They are great if you have little kids for just pulling a downhill sled around the yard or field.