Anyone out there modify thier 450s yet? I'd be curious as to what jet sizes people are running, and who has the best a-arm replacements.

The articles I read say the factory pipe, with the removable baffle is just as good or better than the after market ones - anybody see specs yet?

Anyone buy the kick starter option?

Anyone else notice how the battery sucks?

I take it I need an extra battery? Or the kick starter? Nice name tron. Peace

Got a pipe and jet kit. Will put it on this trip after I break it in. Want to see if there is a difference. Peace

pull the baffle out, take the airbox lid off and do the cam mod

with these mods you will be plenty happy with your YFZ450

Chef - Didn't know they made a jet kit yet, is it a Dyna-jet?

Bansh- cam mod?

Yeah DYNOJET has kits for the 450

with the Lid off and Baffle Out it already Halls Arrrsseee!

so what's up with the battery? Haven't picked mine up yet but I don't want to run into any problems.

took my 450 to octillo wells and to glamis and had no problems with the battery. had the baffle out and the air box lid off at mother "G" ran like a champ, just alittle pinging going down big hills while coasting. I'm looking to had a complete exhaust system, k&n air filter, and to rejet before the next trip, if wifeey permits, yeah right.......

did you mix the race gas with super, or ran the 110 by itself. used only 1/2 a tank stopped it from pinging.

Has anybody used the Dynojet's for the 450 if so what Main Jet? and Clip setting? and How many turns on the Mixture screw?

Got my 450 home from Alba , with GYT-r pipe , it was back firing , , they couldnt fix it, it still back fires , i am takin it to scribbs this week maybe they can jet it right. Oh yeah , even with it jetted wrong i was still beating piped banshees, even my own 01, with fmf fattys couldnt keep up.

thanks, thats. once you run race gas, do you have to continue running race gas, or can you run 91 or higher?

The YFZ is lean from the factory for Glamis and the load that is applied in the dunes. If using factory jets, even a stock bike needs a 168 main and a 45 pilot to run correctly. If you are pulling the baffle and running with no lid on the factory main you are seriously risking it. A 168-172 main is fine for a YFZ with the basic mods of the timing mod, baffle out and the lid off. 45 pilot is just about perfect in the three YFZ's we have done that ride at Glamis. We have found that all three bikes like a different needle postion on the factory needle, but all three are now are running stock needle position at Glamis.

with your air box lid off, baffle out, use 45 pilot, the 168 mainjet, put the needle on clip #4 or #5, and put the airscrew on 1.5 turns

here is an excellent website for jetting, cam mods, and checking valves, etc. for the YFZ450.

http://www.eskimo.com/~daddog/index.htm

A friend of mine bought a YFZ450 in the middle of July for a trip to the Idaho sand dunes. After the first two days, we had to push start it. We put a charger on it the next day, which didn't help at all. After he got it home, the dealer did warranty the battery.

So, I think the kick start kit would be a good idea.

what does changing the cam do? saw the video, read several people talking about it, but dont know what it does to the bike, thanks

does it make a big difference? is re-jetting needed? seems like it isnt hard to do, so that might be something to do until I get the pipe for it
thanks

Take a look at these A-arms. socalfab.com

WE HAVE MODIFIED ARE YFZ450
WE PUT CURTIS SPARKS PIPE RAN A STRAIGHT K & N FILETER KIT DIRECT FROM CARB
AND PUT 6 IN OVER SWINGARM AERO TUBE AND PUT ALL OUR BILLET ACCESSORIES

WE WILL BE HAVE OUR CHRISTMAS SALE FOR MORE INFO
LOOK US UP AT THE WBE AT WWW.RISDESIGNS.COM

Racing my sons stock YFZ450, with stock tires, he beat a built DS 650 and a built Predator that both had paddles up the wall at Dumont.

The piped, jetted and paddled YFZ 450s were astoundingly faster still.

But,, my main like of the YFZ 450 is the fun to ride handling.

The local shops here are jetting 5 sizes up with some complaints of a slight hesitation off of idle.

For this reason I'm going to just observe for a spell and see what you guys finally decide on for jetting. Perhaps 5 sizes up is too much.. DAMFINO.

One thing I know for sure, if you stop for more than 30 seconds, shut off the motor. They heat up fast.

And, when ya tie/strap the quad to you rig,,, don't strap it by it by its A arms,, you'll bend them if too tight.

- Ross Kathy Trev and Maren Turbo
2 YFZ 450's
GMC 4X4 HD 2500 Crew Cab