5/6 speed in YZ 450?

9 replies to this topic
  • Mr Ed

Posted April 02, 2005 - 09:29 PM


Hi all,

I'm pretty new here, certainly no Yammaha expert and I have a question:

Is it possible to upgrade the YZ 450 to a 5 or 6 speed gearbox (a-la KTM SX 450 with EXC 6 speed)? I'm up in the air between the CR-F, YZ-F, KTM SX, and perhaps the RM-Z 450 (yeah, like everyone else in the world), and the fact that the Honda is the only 5 speed is seriously weighing my decision. I've spent time on a 426 F, and really enjoyed it. We have a huge amount of desert here, so the gearing is important. I don't really want a WR though....

Thanks! :naughty:

  • yz_for_me

Posted April 02, 2005 - 09:34 PM


With the YZF you're pretty much stuck with the 4 speed tranny. If you want a 5 speed blue bike you have to go with a WR.

  • kizzle426

Posted April 02, 2005 - 10:00 PM


Or you can get an '02 YZ426F like I did. Trust me, you won't regret it. I've ridden an'05 cr450 and an '03 yz450. I was most impressed with mine, and that's an honest opinion. It was before I bought the 426. LONG LIVE THE YZF!!!

  • cowboyona426

Posted April 02, 2005 - 10:13 PM


You can put a 5 speed in the YZ 450, but you have to buy a complete WR 450 trans- shift shafts, shift forks, 10 gears, the works. I think it costs about $700 but I haven't heard any snivels from the guys who have done it.

  • ovrrdrive

Posted April 03, 2005 - 03:47 AM


Yeah, from what I've read, the WR gears are a drop in replacement for the YZ...

Visit the ThumperTalk Store for the lowest prices on motorcycle / ATV parts and accessories - Guaranteed
  • yz_for_me

Posted April 03, 2005 - 10:56 AM


With the YZF you're pretty much stuck with the 4 speed tranny. If you want a 5 speed blue bike you have to go with a WR.

I stand corrected. The last I had read on this the WR trans was not a drop in replacement for the YZ, but after further searching I see that it apparently has successfully been done. Cool! Here's the Thread

  • grayracer513

Posted April 03, 2005 - 03:25 PM


The WR450 5 speed is, in fact, a drop in. You get a lower low, 2,3, and 4 are about the same, and then an "overdrive". There is a possibility that the YFZ450 quad trans may also fit, as I believe the only difference in the crankcases between that and the WR are the hard points for mounting. The quad trans is a closer ratio box. If it worked, I might want to use the mainshaft and low gear from the quad with the balance of the trans from a WR. That would be very much like adding one on top of the existing 4 speed.

No part of the four speed can be used with the swap, not even the forks.

The 426 trans has been used, but according to a long time TT member who did one, it's "a huge PITA" that requires a lot of minor machine work because of internal difference between the 450 and 426.

  • yzf450jack

Posted April 03, 2005 - 06:14 PM


I put a 5 speed in my 03 450 :naughty: works like a charm I love it :naughty:

  • the go-devil

Posted April 04, 2005 - 03:20 AM


If you're leaning towards the Honda make sure not to overlook the fact that the CRF450R might be a five speed but it is a close ratio tranny with a relatively high 1st and low 5th. How about the CRF450X? Or is that what you were refering to when mentioning a "CRF"?

  • the go-devil

Posted April 04, 2005 - 03:23 AM


yzf450jack, how much did it cost for the parts to convert to a 5 speed?

Related Content



Dirt Bike   Make / Model Specific   Yamaha   YZ 400/426/450
  • Hot  30 replies

The "going back to the other darkside" adventure... by Monk

Dirt Bike   Make / Model Specific   KTM   250/350/450/505 SX-F & XC-F (4-Strokes)
  • Hot  113 replies

Chubby dad, looking at bikes , First trip to the orange/black forum ! by Slow_ride

Dirt Bike   Make / Model Specific   KTM   250-530 EXC/MXC/SXC/XC-W/XCR-W (4-Strokes)
  • Hot  28 replies

Yamaha YZ450F 2017 by Chris.GVS

Yamaha YZ450F 2017
  • * * * * *
  • 1 review
  • Last review by Tommyk_55
  • On January 15, 2017

Snake pit oct 30th by The Anvil

Dirt Bike   Dirt Bike Regional Discussion   California
  • Hot  293 replies

Join Our Community!

Even if you don't want to post, registered members get access to tools that make finding & following the good stuff easier.

If you enjoyed reading about "" here in the ThumperTalk archive, you'll LOVE our community. Come join ThumperTalk today!

The views and opinions expressed on this page are strictly those of the author, and have not been reviewed or approved by ThumperTalk.