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MudFlap

HELP!!! Throttle Stop?

7 posts in this topic

I ordered a 2005 YZ450F throttle stop for my 2005 WR450F and when I installed it with no problems I proceeded to test it and the throttle stuck wide open NOT GOOD. Too unstick it I had to move the accelerator pump lever. Does anybody have any ideas?

I took my digital caliper and measured the shank of the YZ stop and it was 18.23mm or 0.7175", is this the proper length? :cry:

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I am looking for the same info myself I was about to do what you did to my brother in laws bike.

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What Part number did you use....I order 5JG-14591-00-00 which is a YZ450 2003, but its supposed to be the same part number for 2004 and 2005 ???

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This is the part number on the little bag in which it arrived 5JG-14591-00. When I measured its length not including the head it is 18.23mm or 0.7175" long shank.

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Well I found the problem!! It seems that someone at my local dealer tampered with my carb. before I picked up my new bike. As I examined my carb. I noticed what appeared to be screwdriver marks around the accelerator pump link lever. When I looked even closer I also noticed that the link lever was bent which caused it to hang up on the throttle shaft. I managed to fix it and everything works fine with the YZ450F throttle stop.

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Ya, the YZ450F stop screw is maybe 3mm shorter than the YZ250F screw, but the dealer said that it would be fine for my WR250F.

I checked total travel and action with no screw and with the YZ450F screw and it definitely does act as a stop... with no screw, you can hear and feel the slide hitting the carb's top cover plate.

Works fine... same part number you got.

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