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MountainPerformance.com
THE YAMAHA SUPER STORE
Exclusive Manufacturer of the Year 2000 YAMAHA Mountain Max
Snowmobile Update Kit.
MOUNTAIN TUNNEL KITS, GYT PIPES
... and Discount Direct Accessories |
SETUP INFORMATION FOR MY
1997 (1998 uses same info) YAMAHA MOUNTAIN MAX 700cc
Please E-mail me your comments & experiences randolph@macr.com
 | My Conditions:
 | 7000 to 10,000 feet |
| 0F to 40F |
| Camoplast 2" Track |
| DEEP POWDER RIDING
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| Key Improvement - Yamaha GYT Pipes - See 97 Mtn Max Mods
Page.
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| Primary Clutch (Drive)
| Roller Diameter 14.5mm 8CA-91 w/ Duralon bushing (stock) |
| Weight P/N 8CR-00 w/Duralon
bushing (stock) |
| Rivet Inner 1 10.3 Steel
(stock) |
| Rivet Outer 1 10.3 Al
(modified - none stock) |
| Spring
Pink/Pink/Pink (stock, after update)
(Rate 3.0Kg/mm, 30Kg pre-load) |
| Spring Shims 1 (none stock) |
| Engagement 3700 rpm (3500 stock) |
| NOTES: The sled came with no Rivet in the outer hole and no shim. RPMs are great at
8300, they were a little low (8000 to 8100) before I added pipes.
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| Secondary Clutch (Driven)
| Helix
43deg Yamaha |
| Spring
Green (stock) |
| Pre-Load
70deg |
| Shift Speed 8300rmp SOLID
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| Gearing
| Drive Axle 8
Tooth (stock 9 tooth) |
| Top Gear
21 Tooth (stock 22 - See Note) |
| Bottom Gear 40 Tooth (stock) |
| Chain
70 Link (stock 70L) |
| NOTES: The sled came with 22/40 and 9 tooth drivers, but with Yamaha now recommends the
same 20/40 with 9 Tooth (as we settled on last year). I'm running a 2" track, so had
to replace the 9 tooth drivers with 8 tooth. 22/40 with 8 tooth is the same ratio as 20/40
with 9 tooth. Last years belt had problems and this eliminated them. This year's belt is
great! I
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| Jetting
| Cyl #1 (PTO) 131.3 (chart recommended at 20F and 8K
to 10K feet, but a little fat w/o pipes) |
| Cyl #2 (Center) 130.0 (chart recommended) |
| Cyl #3 (Mag) 130.0 (chart recommended) |
| Pilot Jets (all) 62.5 (stock 8K to 10K feet and 20/40F) |
| Needle Clip (all) 2nd position |
| NOTES: I originally set my Brothers piped MM700 up with the Needles in the 3rd clip
position, this was too rich! The 2nd clip position is also great w/o pipes. Nice burn
rings on each plug (1/2 way down the electrode) at WOT. My center is the leanest of the 3,
but again, they are all real close. My piston wash looks great (4 small corners are clean)
at Wide Open and mid range; a racer would want to be a bit leaner on both, but I like a
little margin of safety. I HAVE GYT YAMAHA PIPES -- See my MM700
Mods Page. |
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