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Discussion Starter · #1 ·
Here are some pics of the 34 tooth rear sprocket. Also since I had to shorten the chain I just got a new one (green of course) :lmao:

For those who want a replacement chain, EK is the manufacture of the stock chain. I purchased my EK MVXZ green chain off ebay. It was 120 links so I had to take off a bunch of them to make it fit. Then just adjusted the slack.

Seat of the pants dyno (lid off, PCIII, pea shooter out, 34t vs same setup with 38) this thing moves! Going down 4 teeth did not effect the lower gears. I was still able to pull the wheels up in 3rd (didnt have much room to hit 4th and 5th yet).

Just wanted to say thanks to PCMamerica (Jeff) also for his inital work and research.

I was debating on going with a 36 but glad I went with the 34.

In two weeks I will going to the dunes so the real test will be draging and opening her up.

Here is a pic of the sprocket and link lock (they said because of the size it need to be cut in half and link locked)




before adjusting the chain
 

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Sweet! I wonder how it compares now to the other 450s?

Also will a 34 rear work good for xc racing?

And how many teeth are you running up front? Sorry for all the questions!!
 

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Sweet! I wonder how it compares now to the other 450s?

Also will a 34 rear work good for xc racing?

And how many teeth are you running up front? Sorry for all the questions!![/b]
The green chain looks great!

How about a part number, I can't find that sproket listed on thier website

thanks!
 

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Discussion Starter · #4 ·
http://www.sprocketspecialists.com/
part number 2946 (2946-34 for a 34t rear)
ended up being $82 shipped.

I am running the 14t (stock) front

XC racing I am not sure but if you need to go faster this will do it.

When I get a chance the guy next door has a 05 yfz stock to race. I will post comparison then.
 

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I raced a DS650 this weekend, but unfortunately I didnt expect it and had my Quiet exhaust core in my ESR exhaust and both atv's were neck and neck. I smoked my brothers kfx and top speed on the ds verse me was abouyt the same, it was weird, anyone know how fast they are? This was up a hill on pavement.
The reason I had the quiet core in was cause we were riding trails for a few hours far from home and didnt wanna piss anyone off. With the core in you lose alot of HP and it has absolutely no bottom end and doesnt rev up as fast. (I made the quite core from the stock exhaust)

After taking the core out later on its got so much more power im sure id be alittle quicker. I do weigh 205lbs versus the other 150lb rider.

The 34 tooth is great if you drive fast in the trails, but if you dont plan on going fast in the trails dont get it. A 36 would be fine for someone that likes drive somewhat fast. The 34 seems to me like a great gear.


Jeff
 

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http://www.sprocketspecialists.com/
part number 2946 (2946-34 for a 34t rear)
ended up being $82 shipped.

I am running the 14t (stock) front

XC racing I am not sure but if you need to go faster this will do it.

When I get a chance the guy next door has a 05 yfz stock to race. I will post comparison then.[/b]
I guess I have to call them, it won't come up in the search for me. Thank you for the number.

With Jeff's testing and the 34 tooth sproket, and the full set up from Trinity racing for the exhast, FI controller and K&N, I hope to be able to beat others. Its not all about drag racing, some times, even for riding trails, you have long runs where you are running at top speed. We run some old rail road beds,and they go pretty flat for a few miles. If I'm running 55-55 and reving high thats not good. Sounds like the 34. The extra parts will just help more with the drag racing. I'll report in about 7-8 days when I get everything.

Went to a poker run today too, I was the only KFX450 there. Was getting a lot of attention. A guy walked up to me and started talking to me as I was looking at the other machines (about 250 quads over the event) and said to me, "some one has a KFX450R here, it really looks awesome!, I want to get one." I looked at him and played dumb for a minute, and said, "o'yea, a KFX450.....hmmmm.....its here because its mine, ha ha ha!" Guy was pretty cool, already has a new KFX400. Then something a little strange happened. As I was walking back to my ride, and there was a group of 5 or 6 people looking at the 450, a middle age woman started asking me all kinds of questions, I told her it was slow and her responce was "what about getting a pipe and rejetting it" I didn't expect a woman to make a comment like that! I responding with a yes, but with the FI, you need a programmer for 2-$300. Would have been fun talking to her more if I didn't have to leave for the ride!

Good day but a little too slow of a ride for me.
 

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82$ just for the rear sprocket? Thats a lot for a sprocket. I think i may have to wait for a renthal or sun star or something. Rocky mt. says they are on back order til sept. There should be some out before too long. Has anyone contacted sidewinder for a timeline yet. I wouldn't mind spending a little extra for one of their kits.
 

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Discussion Starter · #8 ·
Renthal only went down to a 36. It was 62.99 but they had to add the link lock option so you can add it to the sprocket hub with out taking the hub off so that added the extra cost plus shipping.
Considering I spent close to 7K for the quad $90 was another cheap mod.
 

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I think the $82 for the sprocket is not a big deal, it is cutting my current chain or buying a new one that bothers me. The green chain looks great but $100 wow.

Anyway I am going to wait on a little more data but the sprocket is looking like a good buy.
 

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Discussion Starter · #10 ·
I think the $82 for the sprocket is not a big deal, it is cutting my current chain or buying a new one that bothers me. The green chain looks great but $100 wow.

Anyway I am going to wait on a little more data but the sprocket is looking like a good buy.[/b]
Just cut the stock chain. It has a master link already.

I just purchased the second chain in case i didnt like the rear sprocket then I could go back. Now after riding it I have the stock chain and sprocket in a box on the shelf for good.
 

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So this a perfect all-around sprocket? I ride mostly trails im just worried about loseing bottom end, will this happen if I change to a 34 rear?

Thanks for the post!

Now where can I get one? :D
 

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Discussion Starter · #14 ·
So this a perfect all-around sprocket? I ride mostly trails im just worried about loseing bottom end, will this happen if I change to a 34 rear?

Thanks for the post!

Now where can I get one? :D[/b]
Yes its a great all around sprocket.

Didn't loose anything on the bottom end.

http://www.sprocketspecialists.com/
part number 2946 (2946-34 for a 34t rear)
 

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Discussion Starter · #15 ·
i do a lot of motorcross and im guessing for that it would be a good idea to stay with the stocker or a 36 tooth ?? right?? or no[/b]
I would start out with a 36 and see how you like the added top end, if you need more then you can move to the 34.

i changed my mind set, get the 34 and if you dont like it for MX then you can sell it here on this forum
 

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I'm gonna order by phone tomorrow. 34 toof it is. Good info! :ph34r:
 

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I dont recommend the 34 for the motorcross track. Its too far spaced to find the exact gear you need. Better safe than sorry. I would get a 36 tops for the track, but your better off with a 15 tooth front for 17 dollars, its cheaper and does the same thing just about.

34s good all around, but when I took my exhaust and put the quiet core in you could notice it didnt breath as well or even rev as fast and you lose alot of hp, long story short it works well with mods, therfore making large hp gains and more bottom end torque.. I highly suggest a pipe, PC3 and if possible a crower or similar cam, it such a big difference. This machine was like made to be uncorked, but it will cost some $$$.

My brothers got he 15 front and hes happy but if you wanna drag or go fast get the 34. I smoke him every time and im a concrete bag heavier.


Jeff
 

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I got my 34 tooth installed and got rid of a link. Thursday I'm touching down in sand. I'll report back on how it does. My quad is bone stock otherwise.
 

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Discussion Starter · #20 ·
I got my 34 tooth installed and got rid of a link. Thursday I'm touching down in sand. I'll report back on how it does. My quad is bone stock otherwise.[/b]
You headed to Silver Lake? I have plans for a one day trip the 18th
 
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