Multiple questions for 07 YZ450F with WB alum pro II


7 replies to this topic
  • Aka.Goose

Posted September 30, 2007 - 12:10 AM

#1

Hey guys...First off, thanks for all the great posts...Most helpful site/users ever...And sorry for popping so many questions into one post...If that's taboo, I'll just chalk it up to being a newbee...

I just picked up a new 07 YZ450F (the white one) from LA Yamaha (Marina Del Rey) for $5600 OTD about a month ago...Been having a blast breaking it in (stock + ASV levers) at LEMX (Lake Elsinore Motocross Park)...Just bought a complete WB Aluminum Pro II kit today for $325 at Del Amo Motorsports blow out sale (couldn't pass on it being more than $300 bucks off)...

My first question is, will I need to rejet due to the new pipe? And if so, what do you recommend? (Pretty much the only places this bike will be ridden is Glamis, Pismo, Ocotillo, Gorman, and SoCal MX tracks)...I was already considering sending the carb to Zip-Ty due to the numerous pops on decel...Should I just stick with that idea?

Secondly, I almost purchased a DID O-ring chain, but was told that it wouldn't make sense since riding in the sand or loose dirt would contaminate the rings to where they aren't performing the way they should anyway...So which chain should I spring for?

Well, I have a few more questions, but since I'm typing a novel, I'll leave it at these for now...Thanks in advance!

  • grayracer513

Posted September 30, 2007 - 07:54 AM

#2

The Zip-Ty mod won't do anything for decel popping. It modifies the main circuit.

http://www.thumperta...599#post3710599

I have run Regina ORN6 O-ring chains exclusively for the last 6 years in the same environment you plan to ride in. They hold up extremely well, in fact the one on my '03 is over two years old and in nearly perfect condition. The key is to avoid chain lubes that dry tacky, and to never pressure wash the chain. I use Maxima "Synthetic Chain Guard", applied at least 8 hours prior to riding. It gathers very little dirt, and washes away with Simple Green and low pressure water.

  • Aka.Goose

Posted September 30, 2007 - 09:35 AM

#3

It comes stock with 45/160, yes?
Would you recommend going with a 165 main? The bike's running very smooth, the only reason I even want to tamper with the stock set up is that I'm pretty sure I have more decel popping going on than I should (realizing some pop is normal)...I guess I need to just shush and put the new pipe on, adjust the fuel screw a bit, and go from there...Plus, so far all the riding on this bike has been in extremely warm weather...

  • Slinkyman16

Posted September 30, 2007 - 09:35 AM

#4

wow u got a great deal on that pipe. the regina is a great o-ring chain. but if u dont mind a little maint then i would reccomend the did ert2. ive never had a problem with the chain streching to much. only about the first two rides as it settles then its maybe ever 4-5th ride it gets out-a-wack.

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  • Aka.Goose

Posted September 30, 2007 - 12:12 PM

#5

What extra maintenance would be required for ert2, as opposed to the other o-ring chains avail? I'm pretty good at maintaining my bike, as I don't plan on buying another for quite some time (to prove my point, my other bike is a '97 KX250, still in good condition even though it's been riden the hell out of, and one of my fav books is "Zen and the Art of Motorcycle Maintenance")...Needless to say, these are two completely different beasts...And I'm shocked that my skill level has increased ten fold just by sitting on the new YZ...
Anyway, changing the chain is a no brainer...What I'm more concerned about is getting the carb dialed in perfectly, as I believe that to be a huge factor in the longevity of the bike, right next to regular oil changes...And not being too mechanically inclined, it's an area I need real help with (the main reason I'm thinking of sending the carb to Zip-Ty)...

  • DesertRacer2

Posted September 30, 2007 - 02:03 PM

#6

My bike was popping a lot on decel when I first purchased it as well. I immediately went to the 48/170 combo. It cured the popping and seemed to run well. I did the Zip Ty mod 2 months ago and they recommended a 48/168 combo. I have been running that ever since and it is perfect. Honestly, I don't think I have ever had a bike jetted more perfectly. I am totally happy and would do the Zip Ty mod again in a second. My brother has an 07 just like me and after he rode mine all he could say was $%&*! "Now I have to go and get it!"

  • Aka.Goose

Posted September 30, 2007 - 02:42 PM

#7

Thanks...After talking to a few guys at the shop (my girlfriend works at Del Amo Motorsports), and what I've seen here on TT, I think I'll go ahead and try the 48/168 combo, along with sending it out to Zip-Ty (everyone that's done it, swears by it, have never heard a single complaint)...How long is their average turn around? I'm going to Glamis the weekend before Halloween, and would sure like to have that done before the trip...

  • DesertRacer2

Posted September 30, 2007 - 04:01 PM

#8

Thanks...After talking to a few guys at the shop (my girlfriend works at Del Amo Motorsports), and what I've seen here on TT, I think I'll go ahead and try the 48/168 combo, along with sending it out to Zip-Ty (everyone that's done it, swears by it, have never heard a single complaint)...How long is their average turn around? I'm going to Glamis the weekend before Halloween, and would sure like to have that done before the trip...


I did mine in the summer at got it back in 2 days. If I were you, I would send it out ASAP before the riding season officially starts. By the way, the guys at Zip Ty are so easy to work with. I was very satisfied with their customer service.





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