Hey there. Just wondering if anyone has installed a dynojet jet kit on there yfz 450, and if you could actually get it tuned. I have tried about every option, accept buying a gytr kit, or making my own kit. Any help would be great. My quad was running awesome, and since I removed the lid and did the prodesign stuff and had to re-jet for that, it has never ran the same. Thanks a lot!

 

you can have my dynojet kit, it sux, I went to the stock jets, the machine is awesome.

 

You know, I am about to that point too. I feel that I have tried everything. I think I may try using the dyno jet needle, but go back to the keihin jets. Whats up with not getting any pilot jets in that kit either??

 

hey boom..dont buy any more jet kits...just call up alba action sports..they will sell you any jet size you need..i just got a 45 pilot 4.49$ and a 170 main 4$ ..do the math less than 10 bucks...

 

Yeah, thats what I am thinking about. Just buying seperate jets, and maybe use my dynojet needle

 

heck I think the stock needle was better then the Dynojet...

Dynojet released there jets toooooo early prob did not do the research, They lost me as a future customer....Never again wasted too many hours to get there crap to work on such a wonderful bike, but thats jmo


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Get the James Dean jet kit for the 450; you will not be disappointed.

 

I heard a few folks are having problems with the james dean jet kit. It makes some good power, but you cant use the quad at half throttle, I guess it falls on its face. If your on and off all the time it doesnt matter, but if your just clippin down the trail, and not reving, it seems to have problems.
I really think that I am just going to make my own kit. I'll put keihin jets back in, and try to use the dynojet needle. Otherwise, I may try the gytr, and see how that does.
I'll figure something out. All's I know is, before making airbox changes and having to jet for it, my bike has not run the same, and its pissin me off.
I thank you all for your comments! ...............appreciate it!

 

Yeah, from what I hear stock jetting w/ a pipe is almost perfect for the elavation we are at.....you are about the same as I am here right 4500 ft?

 

No, spokane is a little lower. Were only at 2500ft. Though, I do most of my riding at about 3000-4000