Harry Klemm - GroupK
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Threads 1 to 30 of 763

Forum: Harry Klemm - GroupK

PWC advice, by Harry Klemm, Owner of GroupK, a professional aftermarket high performance Jetski shop

  1. Yamaha 65U & 63M

    Started by Lakeside518, 07-18-2008 10:14 PM
    • Replies: 5
    • Views: 20,290
    11-23-2020, 11:39 AM Go to last post
  2. Tech Article : About Kaw 440/550 Flywheels

    Started by Group K, 11-21-2017 11:44 AM
    • Replies: 4
    • Views: 10,256
    11-21-2020, 05:22 AM Go to last post
  3. some group k questions from the uk

    Started by 550sx-twins, 05-25-2020 04:08 AM
    • Replies: 0
    • Views: 6,426
    05-25-2020, 04:08 AM Go to last post
    • Replies: 7
    • Views: 13,890
    04-12-2020, 07:10 AM Go to last post
  4. Tech Article : Kaw 650/750/800 Cooling Upgrade

    Started by Group K, 11-21-2017 11:42 AM
    • Replies: 5
    • Views: 11,683
    03-25-2020, 07:05 PM Go to last post
  5. Big Bore head gasket?

    Started by SKISURFONE, 09-19-2019 08:25 PM
    • Replies: 2
    • Views: 14,604
    09-20-2019, 09:05 AM Go to last post
  6. About Racing CDIs

    Started by Group K, 03-16-2018 01:12 PM
    3 Pages
    1 2 3
    • Replies: 21
    • Views: 27,407
    06-23-2019, 05:06 PM Go to last post
  7. Modded 61x Premix ratio?

    Started by boarder1, 09-19-2018 11:42 AM
    • Replies: 0
    • Views: 8,099
    09-19-2018, 11:42 AM Go to last post
  8. Why no yamaha twin pipes?

    Started by Quinc, 09-04-2018 05:22 PM
    • Replies: 7
    • Views: 9,164
    09-12-2018, 02:45 AM Go to last post
  9. Need help turning 750sx with dual 46mm

    Started by Judger, 09-05-2018 05:46 PM
    • Replies: 0
    • Views: 7,992
    09-05-2018, 05:46 PM Go to last post
  10. 951 93 oct head

    Started by Chrisx88, 08-05-2018 12:17 PM
    • Replies: 0
    • Views: 8,398
    08-05-2018, 12:17 PM Go to last post
  11. Dual 44mm Carbs on Superjet

    Started by Doug997, 06-21-2014 03:47 PM
    2 Pages
    1 2
    • Replies: 15
    • Views: 25,912
    04-25-2018, 10:37 AM Go to last post
  12. Sxr 1500

    Started by Dano 7, 03-31-2018 11:36 PM
    • Replies: 1
    • Views: 8,617
    04-02-2018, 12:24 PM Go to last post
  13. Tech Article : Riblets and your PWC

    Started by Group K, 12-16-2017 03:23 PM
    • Replies: 3
    • Views: 9,506
    12-17-2017, 02:04 PM Go to last post
    • Replies: 4
    • Views: 9,441
    12-13-2017, 12:47 AM Go to last post
  14. 750sxi pro Factory limited pipe

    Started by Corndog69, 10-19-2017 02:00 PM
    • Replies: 1
    • Views: 9,554
    10-20-2017, 12:56 PM Go to last post
    • Replies: 5
    • Views: 11,236
    10-14-2017, 09:48 AM Go to last post
  15. 1996 Sea Doo GTi 717cc motor

    Started by Cliff, 09-25-2017 01:52 AM
    • Replies: 2
    • Views: 9,431
    10-11-2017, 12:15 PM Go to last post
  16. Any history on this ski?

    Started by 550Rush, 05-20-2017 11:59 PM
    • Replies: 3
    • Views: 10,276
    05-21-2017, 09:32 PM Go to last post
  17. Search wiring diagram 800 SX-R with dc cdi

    Started by bounce7, 10-03-2008 11:58 AM
    • Replies: 3
    • Views: 13,281
    05-16-2017, 03:52 PM Go to last post
  18. Getting ahold of GroupK

    Started by twake, 02-13-2017 11:24 PM
    • Replies: 4
    • Views: 11,631
    04-14-2017, 10:50 AM Go to last post
  19. 550 cranks

    Started by Bob Gruen, 12-29-2016 10:48 AM
    • Replies: 0
    • Views: 10,109
    12-29-2016, 10:48 AM Go to last post
  20. superjet rn handeling problems

    Started by timothy, 11-23-2016 01:22 AM
    • Replies: 5
    • Views: 11,141
    11-26-2016, 09:01 PM Go to last post
  21. x2 exhaust hoses?

    Started by timothy, 11-21-2016 01:43 AM
    • Replies: 2
    • Views: 9,758
    11-21-2016, 03:08 AM Go to last post
  22. 99 Ultra pump shimming or rebuilding

    Started by Conkerbfd, 10-21-2016 01:48 PM
    • Replies: 0
    • Views: 9,700
    10-21-2016, 01:48 PM Go to last post
  23. groupk650v2

    Started by timothy, 10-14-2016 03:33 AM
    • Replies: 4
    • Views: 10,412
    10-16-2016, 08:24 PM Go to last post
  24. tigershark avaibility

    Started by Goodchildren, 08-31-2016 09:09 PM
    • Replies: 4
    • Views: 10,809
    10-11-2016, 12:01 PM Go to last post
  25. what spark plugs?

    Started by timothy, 09-25-2016 08:04 PM
    • Replies: 7
    • Views: 11,599
    10-05-2016, 12:35 PM Go to last post
  26. 2008 SXR Better Fuel Economy?

    Started by smd, 08-23-2016 09:35 PM
    • Replies: 4
    • Views: 10,946
    08-31-2016, 11:30 AM Go to last post

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