What clutch kit - Yamaha Grizzly ATV Forum
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post #1 of 7 Old 06-22-2015, 04:06 PM Thread Starter
 
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What clutch kit

I've burnt my belt out on my 700 Grizz. Only done 1000 miles. I competed the Croatia Trophy last year. Which is a hard trail riding event. Since then I've done a lot of road miles. Last week I spent a week in Scotland riding some very technical trails with a lot of winching involved. Which I know is bad.
I have a set of 28" Kenda Bearclaws, which are actually 27" when measured. It's snorkelled. A rad relocate kit. Apart from that it's stock.
I was thinking about a basic EPI kit and severe use belt. Is the belt worth it? Or should I fit the clutch kit and a standard belt?

My riding is mainly fast trails with a bit of winching and a bit of mud.

What do you experts think and recommend?

His

12 700 Grizz in Camo,
Winch,
Soft rear bag,
Ricochet belly armour

Hers

08 700 Grizz in Camo
Winch
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post #2 of 7 Old 06-22-2015, 05:38 PM
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Google "Coop45". He does primary machining, which is your best bet for gaining low end power. That'll give you a 2.9:1 ratio.....stock is about 2.5:1.

You'll also want a purple secondary spring at a minimum.

These two parts combined are much better than any "kit" and cheaper.
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post #3 of 7 Old 06-22-2015, 05:43 PM
 
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Can only chime in on the belt, but after hours of research, the concensus is that the oem is pretty hard to beat at all.

I'm shim'd, but a machined clutch and spring is on the list if I ever find a sugar mama...

(A go fast boat and a helicopter wouldnt hurt either)

Am I the only one who cant sleep at night, wondering why John Wayne walked that way ?

2011 Grizzly 700 FI - Yamaha Blue - 14" M12's with 27" ITP Mudlites - Brake Lockout Bypass - 1.4mm Tractor Supply Shim - Auxiliary Fan Switch - Rotella T6 - KN204 - Lucas 75/90 - Water Wetter
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post #4 of 7 Old 06-23-2015, 08:35 AM
 
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Quote:
Originally Posted by markw View Post
I've burnt my belt out on my 700 Grizz. Only done 1000 miles. I competed the Croatia Trophy last year. Which is a hard trail riding event. Since then I've done a lot of road miles. Last week I spent a week in Scotland riding some very technical trails with a lot of winching involved. Which I know is bad.
I have a set of 28" Kenda Bearclaws, which are actually 27" when measured. It's snorkelled. A rad relocate kit. Apart from that it's stock.
I was thinking about a basic EPI kit and severe use belt. Is the belt worth it? Or should I fit the clutch kit and a standard belt?

My riding is mainly fast trails with a bit of winching and a bit of mud.

What do you experts think and recommend?
Make sure that you are getting enough air to the belt. If your snorkels are to small that may have overheated the belt causing it to fail.
Gates G12 belts are very good or OEM. Never buy a Dayco belt. Don't know who makes the EPI belt.
EPI kits are over priced. Order a spring and some shims off of ebay. I have seem someone in the UK that is machining sheaves, I'll try to find them.

Got any pictures of the race??

Twin sister 16 Kodiak EPS 700 Dirty Egg Salad (Camo)
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Hers 16 Kodiak EPS 700 Camo
25" Reptiles
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2013 Ole blue 700
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grezzzless clutch.


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post #5 of 7 Old 06-23-2015, 10:03 AM
 
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The shim will raise the pulley ratio. This makes it easier on the wet clutch and multiplies the engine torque to the belt.
Also the stock secondary spring doesn't provide enough pressure on the belt for the taller tires.
You should be able to get 1.5 mm's of shim in your 700 without rubbing, and with the spring you can experience the improvement. Then think about the machining for more improvement.

Jim,
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COOP45 Primary, 1.5 mm shim, -1.5 mm belt, Purple Secondary Spring,
21 gram weights, weight covers reduced to 29 mm diameter and a 2 mm Cut Cam Plate.
2 heat range hotter plug, Warn Winch, Passenger Foot Rests, Rock Deflectors, Heated Grips and Hand Mitts,
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post #6 of 7 Old 06-23-2015, 11:14 AM
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Didn't see that he is in the UK, lol. Shipping to Utah would be very expensive, lol.

The shims are probably your best bet.
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post #7 of 7 Old 06-24-2015, 02:50 AM Thread Starter
 
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Not a lot of quad action from Croatia, There were only 5 quads entered. And about 50 cars. WHen I say cars I mean LandRover based, tube buggys and home built monsters. I know of a team that competed in 2011. They openly admitted spending £140,000 on a truck for this event. Shortly after they sold it. Running a big LS engine though and sounded sweet.

If you google Croatia Trophy 2014 you'll find loads of vids. We ran in Trophy class. So with the big boys. The terrain is AWESOME.

Here is a picture tribute to as he put it "those mental guys on quads" from a Belgian photographer

https://www.facebook.com/media/set/?...9301442&type=1

His

12 700 Grizz in Camo,
Winch,
Soft rear bag,
Ricochet belly armour

Hers

08 700 Grizz in Camo
Winch

Last edited by markw; 06-24-2015 at 02:57 AM.
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