Best Mod,s for a 660 Grizzly

Discuss Best Mod,s for a 660 Grizzly in the ATV & DIRT BIKE RELATED DISCUSSIONS AND INFORMATION forums; Just recently purchased a '03 660 griz, and wondering what are the best mods for more power. It has 28" ...


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Old 08-31-2009, 11:12 AM   #1 (permalink)
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Best Mod,s for a 660 Grizzly

Just recently purchased a '03 660 griz, and wondering what are the best mods for more power. It has 28" mudzillas, clutch kit, and a K&N air filter. Do they make a chip or cdi box for this year?
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Old 08-31-2009, 10:58 PM   #2 (permalink)
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Re: Best Mod,s for a 660 Grizzly

you can get a CDI box. Pipe it. If your looking for low end power, do a mud buster cam.

More power, the more likly you wil break the little grizzly axles. Beware.
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Old 09-03-2009, 09:56 PM   #3 (permalink)
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Re: Best Mod,s for a 660 Grizzly

Put a pipe on it ,you will notice a difference
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Old 09-07-2009, 01:29 PM   #4 (permalink)
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Re: Best Mod,s for a 660 Grizzly

Thanks, What type of pipe and cdi box would you recommend? I don't want it too loud.
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Old 09-14-2009, 12:06 AM   #5 (permalink)
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Re: Best Mod,s for a 660 Grizzly

Best mods done to mine were the pipe (HMF Penland), Mudbuster cam/Wiseco piston combo, clutch kit (EPI mudder) and snorkles. Not much of a difference with cdi box (removes limiters wich is nice but doable for much cheaper). I also have a stroker crank in mine but now have to run race fuel blend cause of added compression.
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Old 12-17-2009, 09:00 AM   #6 (permalink)
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Re: Best Mod,s for a 660 Grizzly

Originally Posted by 06 Dragon View Post
Thanks, What type of pipe and cdi box would you recommend? I don't want it too loud.
Dragon, have you done the mods to yer Grizz yet ?? I have also have an 03 Grizz & here's what I have & would highly recommend.

The Pro Design K&N air fliter kit
EHS air box lid
Leo Vince X3 pipe (I really like this & it's not loud at all)
I put a machined sheave for a 660 Rhino in from Fix Power Sports Hunterworks.com Greaseless clutch kit (also for a Rhino)
Hauck Power Sports CDI (gives you about 1000 more RPM they say)

And I just installed a 686 Big Bore Kit with a Raptor cam along with some mild porting & polishing ... I really like this set up.
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Old 12-17-2009, 07:20 PM   #7 (permalink)
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Re: Best Mod,s for a 660 Grizzly

Originally Posted by 06 Dragon View Post
Thanks, What type of pipe and cdi box would you recommend? I don't want it too loud.
I have the two brothers pipe and it is not real loud.Makes a difference in power for sure
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Old 12-20-2009, 09:39 AM   #8 (permalink)
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Re: Best Mod,s for a 660 Grizzly

With Large tires My Mod#3 will be the best bang for your buck! this lowers the take off ratio by 6-7%, so now you will be starting off in 1st gear, instaed of 3rd because of the taller tires.
This mod will not hurt your top speed like my Mod#1 shim mod did.
If you are interested, check out my web site.
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Old 12-20-2009, 09:41 AM   #9 (permalink)
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Re: Best Mod,s for a 660 Grizzly

Originally Posted by Gunny View Post
Dragon, have you done the mods to yer Grizz yet ?? I have also have an 03 Grizz & here's what I have & would highly recommend.

The Pro Design K&N air fliter kit
EHS air box lid
Leo Vince X3 pipe (I really like this & it's not loud at all)
I put a machined sheave for a 660 Rhino in from Fix Power Sports Hunterworks.com Greaseless clutch kit (also for a Rhino)
Hauck Power Sports CDI (gives you about 1000 more RPM they say)

And I just installed a 686 Big Bore Kit with a Raptor cam along with some mild porting & polishing ... I really like this set up.
What kind of fuel do you have to run through that beast!
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Old 12-22-2009, 12:21 PM   #10 (permalink)
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Re: Best Mod,s for a 660 Grizzly

Gunny-

My God man- by the looks of the pics, you should be able to push the shuttle to the moon and back. You do all of this yourself? I'd have that thing put together and never run again. LOL.... LMAO..... LMFAO...... when I get mine running again- me no touch! Did I say that?
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Old 01-05-2010, 02:11 PM   #11 (permalink)
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Re: Best Mod,s for a 660 Grizzly

Originally Posted by Coop45 View Post
What kind of fuel do you have to run through that beast!
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Liv'in at 4300 ft & do'in most my rid'in at about 6500 ft to 11,000 ft, right now I'm runn'in Permium gas, 91 octane ... and once in a while I throw some octane boost in for S&G's !


Originally Posted by grizwaldo View Post
Gunny-

My God man- by the looks of the pics, you should be able to push the shuttle to the moon and back. You do all of this yourself? I'd have that thing put together and never run again. LOL.... LMAO..... LMFAO...... when I get mine running again- me no touch! Did I say that?
Why ... Thank You, Thank You very much ... yeah, I did all the work my lonesome ...

Oh, what's the fun in putt'in all those purty parts in & then not rid'in it ... ya gotta see if ya put it back together right or not ... Savvy ??
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