[Grizz Rider]

Alright I am turning it over to all you ATV experts! I have my wife's 2008 Grizzly 450 and I am wanting to do some things to it to get more power, however she hates when I spend money on it! Can you guys give me ideas for some cheap, but effective mods I can do to it! It currently on has 26" Mudlites and winch, I am going to try putting the power tip from my 700 on her's if it will fit, because I got a HMF pipe for mine. Thanks for all of your insight!

 

[BATTLEGUN]

Cheap power. HA! We all want that. I'm assuming that Grizz is a CVT. If so, look into some diffrenent weights. That will change how the power it already has is delivered. Then I'd think about adding some TPI Valves from Thunder Products. Inexpensive airbox vents that you can shut down when you want to and yes, I'd add a tip at the very minimum. Just my $.02. Let us know what you do though.

 

[GRIZZLYWIZARD]

Cheapest power is going to be air box and exhaust mods. Add some bigger jets to the carb and you'll be set.

 

[Grizz Rider]

Thanks I will do some playing around, I already am bummed out cuz I was hoping that the power tip from my 700 would fit on her 450 but it won't! BG where can I get different weights and is there a thread on here that talks about changing them, I have been thinking of doing it to the 700 too!

 

[BATTLEGUN]

The weights I had for the Grizz 660 (4-450 weights) came from the dealership and they cost be about $20. Only thing is, I've never heard of anyone doing this to a 450. I'm not sure what you would you use. Side note: be prepared to loose off the top end what you gain on the bottom. Someone correct me if I'm wrong.

Click here for the install thread.

Click here for weight information.

 

[1Bad1000Xxc]

I don't see how you can do anything to weights on the 450 to get more power. The reason I say this is on the 700's, we gained power by decreasing the amount of overall weight. We did so using a compbination of 450 weights and 660 weights. Obviously the lightest of the group are the 450 weights so unless there's something else out there the same size but lighter by chance, that will be the only option.

I have heard of people taking weights, cutting the plastic sleave that's on them off to be a little lighter. There's a chance if you did this to all 8 of the 450 weights, it would decrease the overall gram enough to do what you want but hard to say.

As for the "power" tip, that just really isn't gonna give you more seat of the pants gains IMO. The changes it makes are more audible than anything. Yes, airbox and exhaust mods will return the most gains for the buck, and yes the power tip does open up the exhaust. I just don't think you'll get enough power gain from that to justify the $40 or so the power tip costs.

If I have a spare 450 weight, I could pop the sleave off of it and see what type of weight difference that makes. It's probably your best and cheapest solution.

Buster

 

[BATTLEGUN]

I'm right there with you BW. I agree that the tip seems like all noise. However, if you open the box slightly it would help...right? I also expressed the same concern about the weights, but there is a 350 Grizz Auto. I wonder if these weights are the same diameter as the 450?

Grizz Rider states that his wife hates it when he spends money on the Grizz 450, so I have been really conservative with my talking. If you could talk her into a pipe, airbox lid, and a couple of jets I think you would be in the tall grass. I'd venture to say you could do all this for around $400 (prolly less).

 

[1Bad1000Xxc]

BG, good point on the 350. Hadn't thought of that one and don't know specs on the weights.

I'm doubting that his wife is gonna like a pipe b/c of the noise. A 2r tip will tell him that since it's a lot louder to me than stock,but5 not near as loud as a pipe. I would say airbox mods, a new filter that flows better like the UNI and possibly jets or a dial-a-jet. I've never tried a dial-a-jet but you had one so you can confirm or deny it's abilities. I would think it easier to play with than to continuously pull the carb and jkets to re-jet but you can elaborate.

I took a Kodiak 450 weight tonight and popped the sleave off of it which decreased the weight by 2.5 grams. As stock, the weight, with sleave, is 14.1 grams. Without the sleave, it's 11.6 grams. As stock, the total weight on the Kodiak 450 weights (which I am assuming is the same weight they use in the Grizz450) is 112.8 grams for 8 of them.

If you cut the sleave from half (4) of the weights you drop to 102.8 grams. If you pull the sleaves from all 8 weights, you drop to 92.8, which is an 18% decrease in clutch weight total.

If you want to screw with weights and lower their overall weights like many have found good results on the 700s from doing, I would say first pull the sleave off of 4 and see how it goes. You could even do 2 of them first and put them opposite of one another to begin with.

Just a thought. If it were mine, I would take a chance of wasting 2 first. Then if I see a little something, do 4.

Keep in mind, we are not saying if you do this, you WILL have gains, as we've never messed with weights on a 450. It's just a suggestion on what you could try.

Buster

 

[GRIZZLYWIZARD]

Well if we want to be conservative, and not going real loud with the exhaust, then you would gain may and extra pony or two by getting a jet kit, keeping the exhaust stock and adding some more air with a better flowing filter like a UNI. Most likely due to EPA restrictions the 450 like many others is lean and could benefit by changing to a larger jet size.

Another trick that has always been especially with the Keihin CV carburetors is to clip slid spring inside the carburetor one loop at a time until you have notice maximum gain. (Usually between 7-12 loops). Just be sure you have a back up spring before performing this modification. You can access the spring from the top of the carburetor. You will find 4 screws holding the cover on and the spring Another note: The screws that hold the top cover for the carburetor are very soft phillips screws. I think that they are a 12 mm screw. Take one out carefully, go to a hardware store and match it up with an allen type screw. This will save you some future grief.

 

[BATTLEGUN]

Interesting discovery on the weights BW. I would "think" 18% would be noticable. And as well, on the topic of the spring, would this be the same as adjusting the throttle screw (in a sense)?

 

[GRIZZLYWIZARD]

No BG, it's nothing like adjusting the throttle stop screw. The spring is what provides tension for the vacuum slide in the carb. By clipping it, you will increase throttle response some in certain situations.

 

[BATTLEGUN]

No BG, it's nothing like adjusting the throttle stop screw. The spring is what provides tension for the vacuum slide in the carb. By clipping it, you will increase throttle response some in certain situations.

Ahh! Nice trick.

 

[Grizz Rider]

You guys are awesome, I will have to do some playing around with it and let you know what I find out! I was afraid it was going to be a bust on her quad, but this helps a ton. I knew ya'll would pull through for me. I will do some investigating on those 350 wieghts, too! Whatever I find out I will let you all know!

 

[BATTLEGUN]

You guys are awesome, I will have to do some playing around with it and let you know what I find out! I was afraid it was going to be a bust on her quad, but this helps a ton. I knew ya'll would pull through for me. I will do some investigating on those 350 wieghts, too! Whatever I find out I will let you all know!

Please do let us know. I'm actually pretty curious as to whether the 350 weights would work, but if you can make a difference without spending a dime...hey go for it!

 

[Grizz Rider]

I will be all about that!