FAQ: Yamapedia - Common Yamaha Terms

[YammyRX1]

This is a new experiment to see if we can expand the FAQ section and reduce the number of repeat questions and searches. I'm not sure where it will end up and how it will look but if you need the info ask, and if you have the info please share. Right now we can't post in the FAQ section so we will need a little help from Tom to figure out how this should work.

I would like to know more about:

Boondocking
Seafoam
T.O.R.S.
Jackshaft

Hopefully when these definitions are created they will stay in one section so that we can reference them quickly without having to search all previous posts.

 

[BlueByYou2000]

Boondocking-A term used for riders who spend most time off trail. Think of it as back country riding, or exploring off the beaten path.

Seafoam-A fuel additive which protects the fuels properties over time. Used when summarizing your sled. It also coats in inside of the engine to protect that as well.

T.O.R.S.- Yamahas "Throttle Over Ride System". A safety feature that recognizes if your throttle lever freezes open. It this happens the TORS will now your throttle is frozen and not allow the sled to accelerate.

Jackshaft-The jackshaft is the shaft which connects the secondary clutch to the top gear in your chain case.

 

[YammyRX1]

Hyfax

AKA: Sliders, slides

Material: Usually UHMW (ultra high molecular weight polyethylene) or may also be graphite.

Where used: The plastic strips that fit onto the rails and provide a slippery surface for the track to spin. Over time they wear and must be replaced. Some have wear indicator strips, others must be measured. Usually held on by one screw at the front of the rail.

Hyfax wear - place .pdf article here
Hyfax replace - see posts on using track in reverse or attaching to vehicle with tow strap
Tech tips - posts about adding wheels to increase Hyfax life?

 

[Mooseman]

Boondocking: turning or cornering a snowmobile in deep snow with one ski in the air under moderate to heavy throttle, usually requires the rider to be standing or kneeling to counter balance weight and prevent rollover. Also usually is followed by successive turns without letting off the throttle.

SeaFoam: A fuel additive which can be used to stabilize fuel for storage and/or clean fuel system and engine internals. Can be used in 2 or 4 stroke engines. In a car engine, you would use 1/3 in engine oil for 1 hour prior to oil change, 1/3 poured into throttle or brake vacuum line while running and 1/3 into fuel tank. Amounts should be adjusted for use in smaller engines.

PS: Ottawa area can get SeaFoam for $8.99 at Max Auto Supply (UAP/Napa is usually at $14.99)

 

[YammyRX1]

Carbides

AKA: wear bars, runners

Material: Usually round steel bar with threaded rod welded to top for mounting and carbide inserts on bottom. Carbide is an extremely hard substance used in high wear applications like cutting tools.

Used under skis as primary contact with ground to prevent wear and help steering. Many lengths and variations available to change steering characterisitics.
-more studs or longer tracks generally require longer carbides to help turn easier
-dooleys are two rows of carbide per ski to reduce 'darting'
-carbides can have different shapes to be more or less like a knife edge (60 degree or 90 degree, etc)
-life expectancy will vary with riding conditions, road running will wear them out much faster than snow

Check carbide wear at least every season and more often if road running.

 

[Woody]

Stretched: this is the process of taking a sled and puting a longer track and suspension under it. For example, I once had a Viper with a 121 inch track under it. I pulled the suspension, changed the drivers that turn the track, put on a 136 inch track on, and put rail extensions on for the longer track. You can also just do a complete skid replacement with a longer skid (suspension/rail assembly). This can be done for any track / skid you have, as I'd like to "stretch" my 136 inch Attak to a 144 inch attak for better floatation in deep powder. The benefits of "stretching" a sled are better floatation on deep powder or when boondocking and smoothing out the studder bumps or moguls in the trail a bit. A drawback would be the added weight of the longer skid and the longer track using more of your horsepower to turn it. Also, if you do not have "tip up" rails or extensions, it may make your sled push in the corners.

Push: The snowmobile doesn't want to turn in the corners and wants to go straight into the trees you're trying to avoid.

Tip Up Rails: Some sleds with mountain or cross over skids in them with longer rails will have the ends "Tipped Up" a few degrees. This will still give you the floatation you need in the powder, however it lifts the last few inches of the track off the ground in hard pack trails, so your sled handles like a shorter tracked sled. For example, a 121 inch sled turns a lot easier than an 162 inch sled in the turns. The new XTX line of sleds has "tip ups" so that a 144 inch sled handles like a 121 inch sled in the turns on trails, but still has floatation in the powder.

 

[YammyRX1]

Studs

 

[rxrider]

Boosted aka turbocharged or supercharged aka forced air induction, makes a good 100% more power in the right application.

AFR = AirFuelRatio - the relation between the amount of 1 part fuel to X parts of air in the air/fuel charge.