Must have mods, 2013 RMZ450 race bike.

[BDubb106]

Picking up my 13' tomorrow morning so Im looking for suggestions on parts that should be on the list to improve the bike. Won a $1000 gift card through a raffle at one of the local races. Already ordered a complete Yosh RS-4 exhaust, and Yosh PIM2 & data box. As well as a few SS oil filters, oil, air filters, etc. for reg maintenance.

Wanting to know what other parts I should be looking into to improve bike performance and reliability. Read somewhere that a 1.6 Rad cap should be first on the list. Sending the suspension in tomorrow as well so I will have a little bit of time to get parts ordered and installed while suspension is out.

Edited July 7, 2013 by BDubb106

[kauwboye]

First thing on the 13 has to be getting the forks to work!!!!!!!

[BDubb106]

Notice I mentioned in my original post that they will be going to my suspension guy tomorrow along with the shock. That is the first thing that is done with any bike that I buy.

[Rotaholic]

RM250 air filter cage, new grips, clutch perch (pro taper or works connection) gripper seat cover, the one industries one is good. Sounds like you have most things covered. Enjoy, they're great bikes

[BDubb106]

Ill be getting a motoseat with my graphics kit... I was actually thinking about getting the Twin Air power flow kit or is there a reason that the RM250 cage is better?

Ill also be replacing the regular stuff with my favorite bars, grips, and levers (I'll have to buy another brake lever obviously). Already have all that stuff sitting here. Have some rad braces and a shim kit on the list as well.

Was thinking about a Boyesen Hi Flo water pump kit... worth the money or just wasting money?

Specifically wondering about the stock clutch too... heard that they were junk after a few hours of ride time. Always feel like it is wanting to slip. Is that just someone BS'ing me, or is it a good idea to buy a beefier clutch kit?

[JFM43]

I don't think you need to worry about the water pump. I've read the Boyesen pump circulates the water too fast for the rads to efficiently cool it down. Don't know that for sure of course. If anything maybe a 1.6 rad cap with some engine ice. Honestly, I ride trails more than track and never had an overheating problem. I've ridin' for hours upon hours and I have never overheated. Going on 104 hours and my bike still runs like a bat out of hell. Sill on the stock clutch too. The clutch is deff not what it used to be but still works just fine.

Get bars, grips, levers, gripper seat,rad braces and get it sprung for your weight. Then ride that baby!

Mine is 2009 RMZ450.

[Rotaholic]

The rm250 filter cage is about $10, cheapest mod you can do by far, the clutch is a personal thing, my stock clutchs are fine, some people abuse them and some don't

[BDubb106]

Cool thanks for the info Rotaholic. Mind telling me exactly what the rm250 cage does that the stock cage does not?

[JFM43]

Whats up with the 250 filter cage. Why is it better than stock 450?

[racertodd]

Whats up with the 250 filter cage. Why is it better than stock 450?

Same cage it just doesn't have the wire mesh glued to it, They say that it lets the bike get more air because the mesh screen restricts it. Some people claim 1/2 to 1 full hp Edited July 8, 2013 by racertodd

[Rotaholic]

Exactly what racertodd said, good for a 1hp gain plus throttle reponse. The bike breathes so much better, the backfire screen isn't really needed now that the bikes are fuel injected. You can take the backfire screen out of your stock cage but its such a hassle using a heat gun etc, I think its about $100 for say a twin air cage which is CNC machined alloy but the plastic one is just as good, its at the point of diminishing returns.

[BDubb106]

Yep twin air cage is $100 give or take. Ill be looking for a 250 cage.

[zukrmx]

The rm250 air filter cage his that a good mod for a rmx450 too? And what year?

[Hans Schmid]

I think the exhaust money could have been spent better somewhere else.....but

A stabilizer is where I would stick my money.....

Edited July 8, 2013 by originalmonk

[racertodd]

Yep twin air cage is $100 give or take. Ill be looking for a 250 cage.

RM125 RM250 YZ125 or YZ250 cage will work they are the same... Also YZ and YZF filters work too. on older models on the YZF 2009 and older

[BDubb106]

Cool thanks! I have about 20 clean Yz250 filters hanging in the shop so that is good news. Means I dont need to buy a new wash cap either!

[JFM43]

Good info, thanks.

[JFM43]

What year RM250 filter cage would I need for my 2009 RMZ450?

[Rotaholic]

What year RM250 filter cage would I need for my 2009 RMZ450?

Anything from 02 to 08 will fit, probably other years too

[Holgate122]

51 tooth rear sprocket made a big difference for me.

Also, oversized front rotor helped.