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mb450

07 WR450 Throttle stop

6 posts in this topic

I just bought o new 07 WR450. I want to do the throttle stop mod. Where in the parts diagram is it or how can I do it myself?

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MB you can probably do a search on here and get more detailed information but basically, if you look at the right side of your bike and the carb you will see where the throttle cables enter and attach to the throttle bell. That area is covered with a plate that is held on by two silver allen head screws - one to the upper front and one to the lower rear. The throttle stop screw is to the bottom rear of that plate. I found it pretty much impossible to see with the bike fully assembled. So.....

Remove: seat (10mm), radiator shrouds,(8mm) tank (8mm) side covers (10 mm) rear half of exhaust (10 mm)

Remove the lower to bolts on the sub frame and loosen the top bolt on the sub frame (10 mm)

Loosen Air Box boot to carb clamp (allen) and remove upper and lower breather tubes from air box (both on left side).

Pivot sub frame up and forward so that it is resting up side down with the rear fender pointed towards the front of your bike.

Remove upper shock bolt (14mm) and pivot shock rearward. If this does not give you enough room you will have to remove lower shock bolt (17mm) and remove entire shock body.

You will be able to see that black allen head throttle stop bolt, remove it and cut to length or replace with YZ bolt.

Spray some Pam, WD40 or other lubricant onto the air box side of the carb and re-assemble in reverse order.

No more than six or seven minutes of work at most with several beer breaks:lol:

Seriously, not hard just a bit of time spinning wrenches.

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That is a pretty good description... but on my 2008 I was able to change the throttle stop in just a few minutes without disassembling anything... just takes patience and a good allen wrench.

If you know where the hex head of the throttle stop is on the carb it is pretty easy to do even with my big hands. If you've never done one before or can't find the right screw, probably a good idea to follow his steps below. He is right, it is hard to see it with everything in the way.

MB you can probably do a search on here and get more detailed information but basically, if you look at the right side of your bike and the carb you will see where the throttle cables enter and attach to the throttle bell. That area is covered with a plate that is held on by two silver allen head screws - one to the upper front and one to the lower rear. The throttle stop screw is to the bottom rear of that plate. I found it pretty much impossible to see with the bike fully assembled. So.....

Remove: seat (10mm), radiator shrouds,(8mm) tank (8mm) side covers (10 mm) rear half of exhaust (10 mm)

Remove the lower to bolts on the sub frame and loosen the top bolt on the sub frame (10 mm)

Loosen Air Box boot to carb clamp (allen) and remove upper and lower breather tubes from air box (both on left side).

Pivot sub frame up and forward so that it is resting up side down with the rear fender pointed towards the front of your bike.

Remove upper shock bolt (14mm) and pivot shock rearward. If this does not give you enough room you will have to remove lower shock bolt (17mm) and remove entire shock body.

You will be able to see that black allen head throttle stop bolt, remove it and cut to length or replace with YZ bolt.

Spray some Pam, WD40 or other lubricant onto the air box side of the carb and re-assemble in reverse order.

No more than six or seven minutes of work at most with several beer breaks:lol:

Seriously, not hard just a bit of time spinning wrenches.

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my 2008, i was able to change the throttle stop without taking anything off

3/8" by 6" extention with a 3/8 ratchet and 3/8" - allen screw attachement

took all of 2 minutes...

good luck have fun

cheers

Warts

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User Lucgallant (sp?) posted pictures recently either here or on the WR250 section showing the screw and and an 'idiots guide' to a 1 minute stop swap. Ok, maybe 2 minutes.... :worthy:

Hint - It really helps if the Allen tool is a ball end type.

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