Tech Article : Kaw 650/750/800 Cooling Upgrade
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  1. #1
    Tech Guru Resident Guru
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    Tech Article : Kaw 650/750/800 Cooling Upgrade

    We are constantly swamped with Kaw 650/750/800 owners wanting to upgrade their cooling systems (1/2” line … dual water-line, etc). We let them know there is one very simple upgrade that every 650/750/800 owner can do that makes a BIG improvement in cooling. The 650/750/800 cylinders have 3 water jacket entries fed by the water jackets in the exhaust manifold. Unfortunately the lower water jacket entry slot has no connection to the rest of the cooling system and it leads nowhere (which means NO coolant flows through it). By simply drilling a 1/8” hole through the connecting passage, you turn a useless (land locked) cooling passage into an active part of the cooling system. The added reduction in temps around the exhaust port are significant. This cooling mod is a standard addition to all the ported cylinders we do in house at Group K….. It’s easy, and it works damn good …. Your welcome 
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    Unless otherwise stated, responses to all forum posts are based on my personal experiences working within the PWC industry, and developing high performance PWCs since 1987.

    www.groupk.com

  2. #2
    PWCToday.com Is My Home Away From Home freekstyle's Avatar
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    Re: Tech Article : Kaw 650/750/800 Cooling Upgrade

    Nice! Thanks for the tip.

  3. #3
    PWCToday.com Is My Home Away From Home Cleatusjo's Avatar
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    Re: Tech Article : Kaw 650/750/800 Cooling Upgrade

    Great mod, and can be performed in the ski.
    '94 Kawi TS
    2002 Kawi STX-R

    too much to list

  4. #4
    Resident Guru Dano 7's Avatar
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    Re: Tech Article : Kaw 650/750/800 Cooling Upgrade

    Thanks for sharing!
    96/99 ZXI 1100 - Parting out. Have engine & ebox and misc stuff. No hull. PM me for other needed items.


    02 SXI PRO
    04 SXR 800
    19 SXR 1500
    17 YZ 250X

  5. #5
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    Re: Tech Article : Kaw 650/750/800 Cooling Upgrade

    Great tip - Thank you. Just one hole per cylinder, or should I drill holes on each end of the lower water jacket entry slot?

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