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XR.choke butterflies with DR Nick

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This topic contains 4 replies, has 0 voices, and was last updated by  Nick Dole 13 years ago.

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  • December 27, 2012 at 11:42 am #102207

    Greg
    Member

    http://www.youtube.com/watch?v=LxyT6L4iywM&feature=youtube_gdata_player

    TB

    December 28, 2012 at 12:49 pm #234612

    Dean
    Member

    Nice VID TB and Dr Nick B)

    Just a couple of quick questions. For me My XR650R is mainly used for commuting from Hornsby to The city about 60 KM a day. I have an alloy plate installed instead of Original Plate/s.
    1.would this mod be beneficial for my purpose or would I be better off leaving it in> Im happy with the power it makes,but dont want bits sucked into the engine Either.
    2. How much of a power gain is created by removing the restrictions ?
    3. Do you lean it to the right like Nick said or to the left pivoting on the stand like TB said?

    cheers Ollie

    December 28, 2012 at 12:59 pm #234628

    Greg
    Member
    Ollie wrote:
    Nice VID TB and Dr Nick B)

    Just a couple of quick questions. For me My XR650R is mainly used for commuting from Hornsby to The city about 60 KM a day. I have an alloy plate installed instead of Original Plate/s.
    1.would this mod be beneficial for my purpose or would I be better off leaving it in> Im happy with the power it makes,but dont want bits sucked into the engine Either. Answered it yourself the bits in the engine ids the drama, Nick need say about the one piece ones during the video, PS alloy would worry me more because vibrations and alloy don’t mix
    2. How much of a power gain is created by removing the restrictions ? Haven’t measured it cant hurt :laugh:
    3. Do you lean it to the right like Nick said or to the left pivoting on the stand like TB said? Tested both ways, stand to the left works as well and is easier ;)

    cheers Ollie

    Do it mate easy and worth the peace of mind IMO

    TB

    December 28, 2012 at 1:10 pm #234629

    Dean
    Member
    Trailboss wrote:
    Ollie wrote:
    Nice VID TB and Dr Nick B)

    Just a couple of quick questions. For me My XR650R is mainly used for commuting from Hornsby to The city about 60 KM a day. I have an alloy plate installed instead of Original Plate/s.
    1.would this mod be beneficial for my purpose or would I be better off leaving it in> Im happy with the power it makes,but dont want bits sucked into the engine Either. Answered it yourself the bits in the engine ids the drama, Nick need say about the one piece ones during the video, PS alloy would worry me more because vibrations and alloy don’t mix
    2. How much of a power gain is created by removing the restrictions ? Haven’t measured it cant hurt :laugh:
    3. Do you lean it to the right like Nick said or to the left pivoting on the stand like TB said? Tested both ways, stand to the left works as well and is easier ;)

    cheers Ollie

    Do it mate easy and worth the peace of mind IMO

    TB

    cool when I go back up to Kempsey to pick my bike up I will do the Mods then ;)

    Thanks TB

    PS when are you doing a Rebuild Vid on the XR :whistle:

    Ollie

    December 28, 2012 at 8:17 pm #234630

    Nick Dole
    Member

    I think the choke butterfly and spindle restricts the engines breathing. We always removed it as a performance mod over durability. The XR650 ran well on the ride, bit of a lean hesitation in the middle with a 162 main but not too bad.
    If the choke had a fast idle I’d be more inclined to leave it in. You have to do the fast idle by hand anyway so the butterfly is not worth having.

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