I received 3 Gates Trail Runner belts from VJB I was reading the 
instructions inside the cardboard that wraps around the belt.

" All snowmobile belts yeld better performance and longer life if they are
broken in under moderate riding conditions. Gates strongly suggest that 
the first 10-15 miles of operation be at maximum of one half of full throttle
amd no more than 50 MPH. During the break in peroid, frequent over the speed 
ratio range is also required (ride so that the transmission system shifts often)."

Pilot belt part numbers 

Other belt numbers

Marshall HT1121 about 22.00 (not as thick as the Honda belt)
Stock Honda Pilot Belt - part #: 22102-HEO-0003 Mitsuboshi, from Hillside Honda 55.39
Dayco Max 1121 cost about $30
Gates Trail Runner 19T4090 VJB was selling them for 25.00 + shipping (not as thick as the Honda belt)
The Max 1042 (Dayco) crosses over to the Gates 6044 for the '84 to '87 350's The Max 1110 (Dayco) crosses
over to the Gates 6310 for the 250's. 
The Max 1110 (Dayco) crosses over to the Gates 6310 for the 250's. 
Goodyear 71113

Stock Honda FL400 Pilot Belt Mitsuboshi. Part #: 22102-HEO-0003 Price: $53.00 Supplier: Hillside Honda, 707-263-9000

Goodyear Powerstreak, Part #'s: 71113 AND/OR 71162 (Don't know the difference between the two) Prices: 71113 -
$49.00 + shipping 71162 - $52.00 + shipping Supplier: Dunepilot, (Post your request on GOL) 

Dayco Max 1121 (Arimax reinforced, not as thick as stock Pilot belt) Part #: 3211048 Price: $30.00 + shipping (I'm working
to get this price down, will post if & when) Supplier: Dunepilot, (Post your request on GOL) 

Marshall HT1121 (Same as Dayco Max 1121 (not as thick as stock Pilot belt) Part #: 3211048 Price: $22.00 + shipping
(Again, working to get this price down, will post if & when) Supplier: Dunepilot, (Post your request on GOL) 

Salsbury - Comet belt Part #: 704058, Get them from Marv at 4X4 Tuff 

Powerbloc Pilot Belt (Kevlar reinforced) Part #: ? Price: ? Supplier: HRD Racing (www.hrdracing.com) 909-875-4150 (Last
time I spoke to Harold, he was out of belts, but might try to get some in if there is interest.) 

Gates Trail Runner (not as thick as the Honda belt) Part #: 19T4090 Price: $25.00 + shipping Supplier: VJB, (Don’t know
if he is still offering, but, post your request on GOL. I can get this belt as well, price is about $33.00 + shipping, post if you
want it.)

Pictures of my Power Bloc Clutch including tech tips.

How does a clutch work? Good information on clutching by Gates

Check out the Gates Snowmobile belt section

Snowbelt Application Catalog
Download your own copies of Gates
Snowmobile Belt catalog pages in
Adobe Acrobat Portable Document
Format (PDF) 

Preparing Your Sled For A Clutch Kit     Good general clutch information.

 Snowmobile TechTips 

          Strength, response critical for racing snowmobile belt.  
         Characteristics of High Performance Vs. Recreational Drive Belts. 
         Troubleshooting Snowmobile Belt Clutch Systems. 
          How does the clutch system work? 
          Optimizing belt fit in the  clutch system.
          Optimizing snowmobile clutch calibration. 
          Impact of secondary gearing on snowmobile performance. 
          Evalutating snowmobile drive performance in the field. 

For additional information about Gates snowmobile belts, email gates@hibbertco.com. 
Please type "Snowmobile Applications 431-2070" in the Subject; your name, address, 
city, state and zip in the Message. Or, call toll free 1-800-678-2358. Ask for"Gates Snowmobile
 Belt Applications" catalog, number 431-2070.

More clutch information  Clutch Weights are the most misunderstood part of a continuous varying transmission