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. Ask Harry Klemm from Group K

    Started by Rob, 10-28-2004 07:54 PM
    30 Pages
    1 2 3 ... 30
    • Replies: 299
    • Views: 40,907
    12-20-2005, 08:50 PM Go to last post
  2. Dual Carb Intake Cross Over Tube

    Started by MrSki, 02-17-2009 01:05 PM
    35 Pages
    1 2 3 ... 35
    • Replies: 348
    • Views: 36,644
    02-25-2013, 10:28 AM Go to last post
  3. About Racing CDIs

    Started by Group K, 03-16-2018 12:12 PM
    3 Pages
    1 2 3
    • Replies: 21
    • Views: 36,570
    06-23-2019, 04:06 PM Go to last post
  4. Dual 44mm Carbs on Superjet

    Started by Doug997, 06-21-2014 02:47 PM
    2 Pages
    1 2
    • Replies: 15
    • Views: 32,766
    04-25-2018, 09:37 AM Go to last post
  5. Yamaha 65U & 63M

    Started by Lakeside518, 07-18-2008 09:14 PM
    • Replies: 5
    • Views: 25,472
    11-23-2020, 10:39 AM Go to last post
  6. The National Parks and Super Jets

    Started by Group K, 02-24-2013 11:19 AM
    10 Pages
    1 2 3 ... 10
    • Replies: 97
    • Views: 23,625
    07-22-2015, 05:32 PM Go to last post
  7. Big Bore head gasket?

    Started by SKISURFONE, 09-19-2019 07:25 PM
    • Replies: 2
    • Views: 18,789
    09-20-2019, 08:05 AM Go to last post
    • Replies: 7
    • Views: 18,623
    04-12-2020, 06:10 AM Go to last post
  8. Search wiring diagram 800 SX-R with dc cdi

    Started by bounce7, 10-03-2008 10:58 AM
    • Replies: 3
    • Views: 17,187
    05-16-2017, 02:52 PM Go to last post
  9. yamaha 89mm pistons

    Started by bad93blaster, 10-17-2007 07:54 PM
    9 Pages
    1 2 3 ... 9
    • Replies: 84
    • Views: 16,846
    02-18-2011, 09:09 PM Go to last post
  10. Tech Article : Kaw 650/750/800 Cooling Upgrade

    Started by Group K, 11-21-2017 10:42 AM
    • Replies: 5
    • Views: 15,792
    03-25-2020, 06:05 PM Go to last post
  11. what spark plugs?

    Started by timothy, 09-25-2016 07:04 PM
    • Replies: 7
    • Views: 15,527
    10-05-2016, 11:35 AM Go to last post
  12. Carb Boring - Not Impressed!!

    Started by MedicMoose, 05-29-2013 09:28 PM
    3 Pages
    1 2 3
    • Replies: 23
    • Views: 15,270
    03-22-2016, 12:06 PM Go to last post
  13. Getting ahold of GroupK

    Started by twake, 02-13-2017 10:24 PM
    • Replies: 4
    • Views: 15,247
    04-14-2017, 09:50 AM Go to last post
    • Replies: 5
    • Views: 15,026
    10-14-2017, 08:48 AM Go to last post
    • Replies: 19
    • Views: 14,978
    10-21-2014, 10:51 AM Go to last post
  14. superjet rn handeling problems

    Started by timothy, 11-23-2016 12:22 AM
    • Replies: 5
    • Views: 14,849
    11-26-2016, 08:01 PM Go to last post
  15. tigershark avaibility

    Started by Goodchildren, 08-31-2016 08:09 PM
    • Replies: 4
    • Views: 14,465
    10-11-2016, 11:01 AM Go to last post
  16. Tech Article : About Kaw 440/550 Flywheels

    Started by Group K, 11-21-2017 10:44 AM
    • Replies: 4
    • Views: 14,294
    11-21-2020, 04:22 AM Go to last post
  17. groupk650v2

    Started by timothy, 10-14-2016 02:33 AM
    • Replies: 4
    • Views: 14,027
    10-16-2016, 07:24 PM Go to last post
  18. Any history on this ski?

    Started by 550Rush, 05-20-2017 10:59 PM
    • Replies: 3
    • Views: 13,926
    05-21-2017, 08:32 PM Go to last post
  19. 550 cranks

    Started by Bob Gruen, 12-29-2016 09:48 AM
    • Replies: 0
    • Views: 13,541
    12-29-2016, 09:48 AM Go to last post
  20. 750sxi pro Factory limited pipe

    Started by Corndog69, 10-19-2017 01:00 PM
    • Replies: 1
    • Views: 13,336
    10-20-2017, 11:56 AM Go to last post
  21. x2 exhaust hoses?

    Started by timothy, 11-21-2016 12:43 AM
    • Replies: 2
    • Views: 13,309
    11-21-2016, 02:08 AM Go to last post
  22. Tech Article : Riblets and your PWC

    Started by Group K, 12-16-2017 02:23 PM
    • Replies: 3
    • Views: 13,271
    12-17-2017, 01:04 PM Go to last post
  23. 1996 Sea Doo GTi 717cc motor

    Started by Cliff, 09-25-2017 12:52 AM
    • Replies: 2
    • Views: 13,258
    10-11-2017, 11:15 AM Go to last post
  24. some group k questions from the uk

    Started by 550sx-twins, 05-25-2020 03:08 AM
    • Replies: 1
    • Views: 13,227
    05-08-2021, 08:37 AM Go to last post
    • Replies: 4
    • Views: 13,180
    12-12-2017, 11:47 PM Go to last post
  25. 99 Ultra pump shimming or rebuilding

    Started by Conkerbfd, 10-21-2016 12:48 PM
    • Replies: 0
    • Views: 13,152
    10-21-2016, 12:48 PM Go to last post

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