07 Yz450 Low End

I've ridden my new YZ at two tracks, one having long straights and sweeping turns. The bike was great there no problem. The second is tighter lots of jumps out of the corners. I really felt the lack of low end and wanted to know what quick fix is there beside a new header, Zip Ty or AP mod? I have a race this coming weekend at the tighter track and any suggestions would be great.

Go up 2 teeth on rear sprocket,that will lower gearing and make pull harder out of tight corners.Hope that helps.......:applause:

Thats what I was thinking, I felt the second was a little low and third was a little high. Thanks for the suggestion.

I've ridden my new YZ at two tracks, one having long straights and sweeping turns. The bike was great there no problem. The second is tighter lots of jumps out of the corners. I really felt the lack of low end and wanted to know what quick fix is there beside a new header, Zip Ty or AP mod? I have a race this coming weekend at the tighter track and any suggestions would be great.

I would go down a tooth in the front its cheaper to change the front than the rear.

Yes, it's cheaper, but that's like adding 3 to the rear, not one or two.

I've ridden my new YZ at two tracks, one having long straights and sweeping turns. The bike was great there no problem. The second is tighter lots of jumps out of the corners. I really felt the lack of low end and wanted to know what quick fix is there beside a new header, Zip Ty or AP mod? I have a race this coming weekend at the tighter track and any suggestions would be great.

Those are the two best options for the low end, especially if you don't want to have to always change the sprockets for whatever track you go to. BUt for the next race it sounds like you should add two teeth to the rear sprocket.

Hey motoheads

Has anybody put a 51 tooth sprocket on their YZ? How did it work. I think it would be a little better for the trails and also good for the track. They come "tall" i think They come w/49

06 YZ450F

51 will go on this week. I tell ya how it was on Monday.:applause:

i noticed i have a 51 tooth IronMan on my 426 and my friend has stock sprockets on his 03 yz450f and mine is way easier to ride in the trails. the wierd thing is, is that my bike out accellerates his and its faster.

I went up 1 tooth (50) on my 06 450 after one ride. Seemed like there was a bit of a gap between 2nd and 3rd with the 49. The 50 has worked well on both long fast tracks and short thight ones.

I wanted more bottom to so I went 51 and the bike pulls third out of corners much better IMO.

I agree with the 50. I put it on and feel like the tranny just feels better. The jetting and AP mod will also gain a horsie or two on the bottom.

I have an 06

I've ridden my new Z at two tracks, one having long straights and sweeping turns. The bike was great there no problem. The second is tighter lots of jumps out of the corners. I really felt the lack of low end and wanted to know what quick fix is there beside a new header, Zip Ty or AP mod? I have a race this coming weekend at the tighter track and any suggestions would be great.

OK so I put on the 51 and it really helped the gap between 2nd and 3RD. I was able to pull 3RD through corners opposed to using the 49 where as I had to shift down to 2nd then a quick shift to 3rd upon exit. I liked it so much I'm going to leave it on no matter what track I'm at. I recommend going up a tooth or two for motocross for any one with an 07. Thanks for all the feed back.:applause:

Yes, it's cheaper, but that's like adding 3 to the rear, not one or two.

Yea! but that is what he wants......Low End! Go down one tooth on the front for about $20.00, slap it in and buddy that baby will climb like a goat!

The problem I find with a smaller front is the chain tends to wear into the swingarm chain slider pre-maturley.

Not only that, but at 12 teeth, the sprockets wear faster, and also wear the chain at a higher rate, Besides, I don't think you'd be happy with a 12/49 on an MX course.

I tried the 50 tooth on my 07 450 and went back to the 49. Even in tight corners the 49 seemed ok to me, but I felt the 50 made me want to shift more. I do have the Dubach exhaust and it helps the bottom enough. It's surprising how one tooth can make a difference.

I tried the 50 tooth on my 07 450 and went back to the 49. ... I felt the 50 made me want to shift more.
Exactly. Unless you can find somewhere on the race track where 2nd is too low, you might try dropping a tooth or two instead. Lowering your gearing makes the gear spacing in the trans seem closer, and you have to shift more. Going higher spreads the gears out, so you shift less.

Anyway, gearing is no more the answer to better bottom end power than shifting from 2nd to 1st is. Do the Zip-Ty mod, get a Dr.D exhaust or similar, and that will boost your low end.

I am running a 50 and really like it. I can use 3rd a lot more and that is how I like to ride. If its lugging to much, a quick stab at the clutch and it starts pulling. I havent raced with it yet, but I think its going to be what I stick with.

Exactly. Unless you can find somewhere on the race track where 2nd is too low, you might try dropping a tooth or two instead. Lowering your gearing makes the gear spacing in the trans seem closer, and you have to shift more. Going higher spreads the gears out, so you shift less.

Anyway, gearing is no more the answer to better bottom end power than shifting from 2nd to 1st is. Do the Zip-Ty mod, get a Dr.D exhaust or similar, and that will boost your low end.

I agree about the exhaust and after hearing goods things about MRD-racing I went to their site and filled out their questionnaire. Well to my surprise Dave gave me a call, answered all my questions about a boost to the low end and gave me a quote. Very cool!!! That made my decision a lot easier.:applause:

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