[OKTRX450R]

I have read it somewhere but I can not find it now...what is the factory gearing.

If I remember correctly 14/36...just want to be sure.

 

[[email protected]]

the rear sproket could be a 37 or 38 and it would be perfect depending on how different the trany is from my ex

 

[LTR450PILOT]

your right it is 14/36

 

[OKTRX450R]

Sure wish we knew the transmission gear ratios as well...errhh, have to wait for the service manual to be produced.

14/36 is very high! Not a true apples to apples comparison without the tranny ratios, but the 04/05 TRX's had 14/38 gearing (20" rear tire)...the 06 models have 13/38 gearing (20" rear tire) and the tranny ratios are lower geared to boot! I am currently running 13/39 on my 05 R and I am pretty happy with it...turning 21" paddles.

I could easily see, with 21" paddles, running at least 13/38 on the LTR...drastic change from stock! Maybe even lower into the 13/40 range due to the 18" stockers...wow...looks like a lot of sprockets to try out.

 

[fatv]

Yeah they geared it high for those 18" tires. I think you are right on for 21" paddles 13/36 or so, and that think will rip.



WWW.FUELATV.COM

 

[LTR450PILOT]

i read in another forum that the front sprocket off a z400 is the same spline as the ltr450.

 

[Rich S]

I'm looking at a 12 for the front if available. I'd rather not add rotating mass if I could avoid it.

less sprocket = less chain = less rotating mass.

 

[fatv]

IMO 12 will be way to low, but who knows.


WWW.FUELATV.COM

 

[[email protected]]

1 tooth on the front sprocket = 2 1/2 teeth on the rear sproket

i was told not to change more than 2 or 3 teeth or else it messes with the gear ratios(not counting in change in tire size cause i ride mx and allways run 18")

 

[OKTRX450R]

Originally posted by [email protected]
1 tooth on the front sprocket = 2 1/2 teeth on the rear sproket

i was told not to change more than 2 or 3 teeth or else it messes with the gear ratios(not counting in change in tire size cause i ride mx and allways run 18\")

I am not following you...if you change just 1 tooth on either sprocket you are messing with the gear ratio...that is the point?

 

[BCGIrish]

anyone know the gearing on the transmission?

 

[Luckiduc13]

Is the RMZ450 spline and the LTR the same???

 

[fatv]

I have heard it is same as z400. I will know for sure if it is the same as a z400 saturday when i get mine home.


WWW.FUELATV.COM

 

[dirtpilot15x]

I would bet you the RMZ450 and the LTR450 splines would be the same don't know for sure but I would think they would be?

 

[[email protected]]

if you gear to high or to low you can ruin the gear ratios if you dont believe me i dont care it is your bike/quad

the transmission is alot more complicated than you think

 

[OKTRX450R]

Originally posted by [email protected]
if you gear to high or to low you can ruin the gear ratios if you dont believe me i dont care it is your bike/quad

the transmission is alot more complicated than you think

Take it easy cowboy...I was asking you to explain further. Changing one tooth on either of the sprockets changes the overall gear ratio...just like changing tire sizes in the rear. I still do not understand ruining the gear ratios...can you explain in more detail?

 

[[email protected]]

the engineers at suzuki and every other quad manufactor design the transmission around the stock sprokets

most 4 strokes have 5 gears i can only speculate to why the magic number is 5 but that what it seems to be. anyways they gear the machine to its horse power the ltr tranny would not work very well with a blaster motor. the blaster is a good example to this theorum because it has 6 gears to help it accel quicker (most 2 strokes have 6 gears because they dont have the tourque a 4 stroke has). if you change the sprocket teeth to much (ive been told 2.5 is the max) your going to lose horse power because the gears have become to short. when the gears become to short you dont lose the horse power you just dont use it. and yes when you put 20" tires on the ltr you should gear it down just to even the tire change out.

 

[TrX450rKiD]

Originally posted by [email protected]
the engineers at suzuki and every other quad manufactor design the transmission around the stock sprokets

most 4 strokes have 5 gears i can only speculate to why the magic number is 5 but that what it seems to be. anyways they gear the machine to its horse power the ltr tranny would not work very well with a blaster motor. the blaster is a good example to this theorum because it has 6 gears to help it accel quicker (most 2 strokes have 6 gears because they dont have the tourque a 4 stroke has). if you change the sprocket teeth to much (ive been told 2.5 is the max) your going to lose  horse power because the gears have become to short. when the gears become to short you dont lose the horse power you just dont use it. and yes when you put 20\" tires on the ltr you should gear it down just to even the tire change out.

Not trying to be a jerk or anything, but I disagree man.

You can put any sprockets you want on there for your application. Obviously some gearing combos will just SUCK because you will be geared too low or too high. But, why on earth would anyone leave it geared horribly wrong? It isn't like he is going to destroy his bike by trying different combos. Different people will like different gearing. I think it is pretty obvious that something like 13 in the front and 50 in the back won't work too well .. LOL.

There is no "max" number of sprocket teeth you can change without "losing" hp. It all depends on your application and preference.

 

[[email protected]]

you have to think about the time it takes to shift too

 

[Rich S]

nothing is going to be hurt other than performance by raising the final drive numbers (aka lower gear).

You could put too much stress on the drive train however if you go too low on the final drive number (aka raising the gear ratio).

Too tall of a gear will put too much stress on the trans and clutch..... where too low of a gear might cause more torgue than the axel can handle. but seriously I doubt a stock motor would have that affect.

I've already bought 20" ITP's for the rear and I do plan on dropping two teeth in the front to have the gearing a little lower than stock.

I will loose some top MPH, but I'm more wanting this bike to be quick and torquey for the dunes.

My wife's LtZ didn't even hit the rev limmitter in 5th at the dunes..... telling me even the stock ratio on that one is too tall for the condition I'm riding it in. I'll only be dropping 1 tooth on hers since it comes stock with 20" tires in the rear.

See if this helps some:
http://home.earthlink.net/~gellett/ltz400.htm

just as an example set it up with 18" Tires as a LTR simmulation (probably not the same gear ratios)......

example setup 18" tire 14t-36t = 74.81mph 5th gear.

My desired tire/gear combo 20" tire 12t-36t = 71.34mph 5th gear edited for proper gear combos I might even get the combos down to a 65ish top mph...... those were done with a 9000rpm redline.
That should only change my out of the hole speed a little. And if thats not enough to hit the limmiter in 5th then I'll fine tune by raising the rear teath count till I get the performance I want.



If this trans gets destroyed by these minor changes, then it doesn't deserve to be in the bike.