wr426

Joined
Oct 10, 2007
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#1
Hi People
New member,with a problem.
Just bought a WR426 2001,havent ridden it yet as hasnt be delivered but little brother has and says goes like sh-t off a shovel but has a huge flat spot in the mid range.
He has spoken to a mate of his who (in the trade ) says it is common with these bikes and is down to the exhaust.
As we speak I have a White Brothers E2 travelling through the ether from your fair land .
Question is ,is it true about the exhausts being an issue and if so what can I do about it?
Cheers
Frank
 
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#2
the wr's are notorious for being backed up.
the mods im about to list will make it loud.
Remove exhaust baffle
remove airbox lid
un plug grey wire
and re jet
since you bought a pipe the first one isnt a worry.
I would think jetting is your problem more than anything.
 
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#3
Thanks.
I will try those when I get it.
Do you have to dyno it for the jets or can you buy a set with the exhaust in mind?
Frank
 
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#4
uh_oh said:
the wr's are notorious for being backed up.
the mods im about to list will make it loud.
Remove exhaust baffle
remove airbox lid
un plug grey wire
QUOTE]


Also, check the throttle stop screw for full throttle. Remove the airbox and look in the back of the carb. If you are not getting full throttle, grind the throttle stop until you do.
 
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#5
Ol'89r said:
uh_oh said:
the wr's are notorious for being backed up.
the mods im about to list will make it loud.
Remove exhaust baffle
remove airbox lid
un plug grey wire
QUOTE]


Also, check the throttle stop screw for full throttle. Remove the airbox and look in the back of the carb. If you are not getting full throttle, grind the throttle stop until you do.
forgot about that, thanks for adding it :nod:
 
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Oct 19, 2006
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#6
I believe you can also buy the YZ426 throttle stop screw for the same year, if you're one of those people who doesn't like grinding on their bikes.
 
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#7
Hey Guys
Thanks for all your help .Little brother tells me he swapped the pipe thats on it for a standard and the flat spot has disapeared .
Hope it stays the same with the e2 !!
Frank
 
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#9
Very true
White Brothers say that their e2 works on standard jetting.So assuming the jets are standard all should be lush.
Bike arrives on the 2nd November . We shall see!!!