05 WR450F Surge
Posted April 05, 2005 - 09:26 PM
I have a 05 WR450F it has 25 miles on it. I realize it is not fully broken in but I have an annoying surge trying to hold a steady speed. It seems to be more prevelent in first and second gear at lower rpm. It feels like a lean condition like it is running out of fuel. Has anyone with an 05 experienced this? Is it normal? Will it improve as the bike breaks in? It is not so bad that I cant live with it at this point but If it gets worse I will have to do something about it. Any info would be greatly appriciated. Thank you in advance. Forgive me if this has been covered in another post I seem to remember hearing somthing about these bikes having a surge.
Posted April 05, 2005 - 09:31 PM
Posted April 06, 2005 - 05:48 AM
I forgot to mention the bike is bone stock no free mods with stock throttle stop.
I don't even know where to begin....
Replace the throttle stop with a YZ throttle stop... Or you can cut your stock one..
Under the tank you'll find a cluster of wires that go into a connector, there lives a grey wire, remove it from the connector, fold it back and tape it down using electrical tape.
You need to jet the bike, Go to the jetting Database here and look at what the rest of us are running, it will save you a lot of time...
Remove that silly little snorkel on the top of your airbox, it's useless....
Remove that silly little snorkel that's inside your muffler. Again, useless...
That should get you going for now..
The most important thing you can do is to do a search here for these mods, they're everywhere.. They get repeated everytime a new guy gets a bike.. Have fun..
Posted April 06, 2005 - 06:19 AM
the salesman should have told you about the mods. With out the mods
the bikes performance is lacking big time. BEFORE YOU DO ANYTHING ELSE DO THE MODS... Like Dan said do a search. There are
a lot of veteran riders and info here at the TT site to take you and your ride to the next level. Enjoy
Posted April 06, 2005 - 06:31 AM
My advice: put 100 easy, soft, gentle miles on it ( to break in), then see how its running, then re-jet for your altitude and normal temp.
Posted April 06, 2005 - 06:38 AM
Posted April 06, 2005 - 06:39 AM
Posted April 06, 2005 - 06:54 AM
Posted April 06, 2005 - 07:08 AM
Posted April 06, 2005 - 07:21 AM
Once you get the thing broken in and jetted right, if you still have a surge, you may want to disconnect the TPS. Once I unhooked mine, which is simply a matter of unplugging one connector, my surge went adios.
If you don't do anything else while you get used to the bike, at least install a YZ throttle stop and get it jetted properly. This will allow you to get the bike to rev properly, facilitating break-in and seating your rings in a more efficient manner. After that, it's up to you. Good luck and welcome to the club...SC
Posted April 06, 2005 - 04:27 PM
Posted April 06, 2005 - 11:29 PM
Posted April 07, 2005 - 04:31 AM
JD said to substitute the Red needle in place of the Blue -- this fixed it. So, (not being a wrencher) I assume that means it was "rich" and the Red needle "leaned it" out.
If you intend to do the Free Mods, do them first before messing with the Jetting. Also, don't forget to do the Lowedog kit to smooth-out the bike's throttle response.
Posted April 07, 2005 - 05:46 AM
Posted April 07, 2005 - 11:47 AM