Accelerator Pump Rebuild Kit - Honda XL250R/500R CB450SC/650SC CM450E CB650/750

$13.95
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Accelerator pump rebuild kit for many of the late 70's and early 80's Honda's. This kit comes with the diaphragm with a 89mm long rod attached, spring, o-ring and a rubber boot for the rod. Get that CB pulling like it should with a fresh accelerator pump! If you're planning to rebuild the carbs and replace all the gaskets, it's a good idea to replace the accelerator pump as well. Check to see if there are any cracks or holes in the diaphragm, if there are, it needs to be replaced.

Replaces Honda part numbers: 16021-MC9-771, 16021-393-004, 16201-393-014, 16021-KB7-671, 16021-426-003, 16021-460-771

Replaces K&L Part Number: 18-2807

Note: Could be used on the CMX250C Rebel from 1985-1987 but the rod needs to be cut.

Fits Honda:

XL250R - 1982-1983
CB450SC Nighthawk - 1983
CB450SC Nighthawk - 1985-1986 - Check rod length before ordering
CM450E - 1983
XL500R - 1982
CB650 - 1979-1982 - Check rod length before ordering
CB650C - 1980-1981 - Check rod length before ordering
CB650SC Nighthawk - 1982
CB750A Hondamatic - 1976-1978
CB750F Super Sport - 1977-1978
CB750K - 1977-1978

12 Reviews Hide Reviews Show Reviews

  • 4
    Fitment for 1982 CB650SC Nighthawk

    Posted by Jacob on 24th Mar 2024

    Heads up to anyone buying this for a CB650SC Nighthawk, this WILL NOT fit. The Rod is 48mm not 89mm.

  • 5
    Fit perfectly

    Posted by John D on 22nd Jun 2023

    I wasn't sure this part would fit my 1980 CB650 but it not only fit, it worked as it should. High quality and attention to detail in the manufacturing.

  • 4
    Pump

    Posted by Stevey Conder on 4th May 2022

    Carb's work! No issues

  • 5
    Nice kit

    Posted by Ronald Grim (DEALER) on 5th Oct 2020

    Fit perfectly and fixed my own bike after it sat neglected for eight + years.

  • 5
    Quality + Service

    Posted by J. on 17th Oct 2019

    As with all 4into1 products I have purchased, the parts were high quality and the fit was perfect. The service was excellent as always.

  • 5
    Smooth function!

    Posted by Neil on 1st Sep 2019

    Replaced the old torn pump with this new one and now it’s working better then ever! Pump funstion is smoother than ever now!

  • 5
    4 into 1 ❤️

    Posted by David on 26th May 2019

    This accelerator pump fit perfect and worked great.

  • 5
    Good fit for when I need it

    Posted by Eddie v on 22nd Apr 2019

    I bought this thinking I may need it for my rebuild. It fit perfectly but never ended up using it because the one I had was in very good condition. Bought it for my 82 cb650sc and just a heads up, you will NEED to cut it to size. You can cut it to the approximate size of your original and adjust accordingly.

  • 5
    Fit a bike made of chicken teeth

    Posted by Unknown on 15th Mar 2019

    It wasn't listed for my 1980 Honda XL500s but it needed one. Perfect fit with no alterations.