Ive heard from the jtatv.com site that there oil mod is very important and if you don't get it, it could cost you $2000 from a broken quad.... is this true?

 

Not sure it's worth $220. This is the first I've heard of their product though. My neighbor had an 04 YFZ and he bought a WR450 crank/piston which upped it to a true 449cc and solved this problem. The wrist pin/rod solves the oil problems. The added displacement is achieved via the WR rod, which is longer then the 04 YFZ rod. I found out all the info about this on the yfzcentral.com forum.

The kit was around $500 or so. Included new Genuine Yamaha rings, piston, rod, crank, bearings, and all gaskets.

Here is a link to my post over on that forum from a few years back: http://www.yfzcentral.com/invi...hp?showtopic=24834&hl=

 

Ok, after reading their whole shpeal on the website, it seems like something that, I suppose, would be worth the money. I'd like to know what "machining" needs to be done to make it work though. Might be something simple that could be done by yourself.


Also, might I suggest this part as well, only $22.99: http://shop.thumpertalk.com/De...n_Plug_p/qmr-03dpb.htm

 

i plan on getting it somtime.... but is it somthing that i should get right away? or can it wait?

thanks.