Harry Klemm - GroupK
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Threads 1 to 30 of 761

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 09:14 PM
    • Replies: 2
    • Views: 2,958
    08-06-2019, 08:46 PM Go to last post
  2. About Racing CDIs

    Started by Group K, 03-16-2018 12:12 PM
    3 Pages
    1 2 3
    • Replies: 21
    • Views: 10,198
    06-23-2019, 04:06 PM Go to last post
  3. Tech Article : Kaw 650/750/800 Cooling Upgrade

    Started by Group K, 11-21-2017 10:42 AM
    • Replies: 4
    • Views: 3,132
    06-01-2019, 10:30 PM Go to last post
  4. Modded 61x Premix ratio?

    Started by boarder1, 09-19-2018 10:42 AM
    • Replies: 0
    • Views: 1,355
    09-19-2018, 10:42 AM Go to last post
  5. Why no yamaha twin pipes?

    Started by Quinc, 09-04-2018 04:22 PM
    • Replies: 7
    • Views: 1,871
    09-12-2018, 01:45 AM Go to last post
  6. Need help turning 750sx with dual 46mm

    Started by Judger, 09-05-2018 04:46 PM
    • Replies: 0
    • Views: 1,246
    09-05-2018, 04:46 PM Go to last post
  7. 951 93 oct head

    Started by Chrisx88, 08-05-2018 11:17 AM
    • Replies: 0
    • Views: 1,449
    08-05-2018, 11:17 AM Go to last post
  8. Dual 44mm Carbs on Superjet

    Started by Doug997, 06-21-2014 02:47 PM
    2 Pages
    1 2
    • Replies: 15
    • Views: 11,119
    04-25-2018, 09:37 AM Go to last post
  9. Sxr 1500

    Started by Dano 7, 03-31-2018 10:36 PM
    • Replies: 1
    • Views: 1,860
    04-02-2018, 11:24 AM Go to last post
  10. Tech Article : Riblets and your PWC

    Started by Group K, 12-16-2017 02:23 PM
    • Replies: 3
    • Views: 2,502
    12-17-2017, 01:04 PM Go to last post
    • Replies: 4
    • Views: 2,383
    12-12-2017, 11:47 PM Go to last post
  11. Tech Article : About Kaw 440/550 Flywheels

    Started by Group K, 11-21-2017 10:44 AM
    • Replies: 0
    • Views: 2,125
    11-21-2017, 10:44 AM Go to last post
  12. 750sxi pro Factory limited pipe

    Started by Corndog69, 10-19-2017 01:00 PM
    • Replies: 1
    • Views: 2,627
    10-20-2017, 11:56 AM Go to last post
    • Replies: 5
    • Views: 4,089
    10-14-2017, 08:48 AM Go to last post
  13. 1996 Sea Doo GTi 717cc motor

    Started by Cliff, 09-25-2017 12:52 AM
    • Replies: 2
    • Views: 2,516
    10-11-2017, 11:15 AM Go to last post
  14. Any history on this ski?

    Started by 550Rush, 05-20-2017 10:59 PM
    • Replies: 3
    • Views: 3,325
    05-21-2017, 08:32 PM Go to last post
  15. Search wiring diagram 800 SX-R with dc cdi

    Started by bounce7, 10-03-2008 10:58 AM
    • Replies: 3
    • Views: 4,540
    05-16-2017, 02:52 PM Go to last post
  16. Getting ahold of GroupK

    Started by twake, 02-13-2017 10:24 PM
    • Replies: 4
    • Views: 4,593
    04-14-2017, 09:50 AM Go to last post
  17. 550 cranks

    Started by Bob Gruen, 12-29-2016 09:48 AM
    • Replies: 0
    • Views: 3,329
    12-29-2016, 09:48 AM Go to last post
  18. superjet rn handeling problems

    Started by timothy, 11-23-2016 12:22 AM
    • Replies: 5
    • Views: 4,213
    11-26-2016, 08:01 PM Go to last post
  19. x2 exhaust hoses?

    Started by timothy, 11-21-2016 12:43 AM
    • Replies: 2
    • Views: 3,019
    11-21-2016, 02:08 AM Go to last post
  20. 99 Ultra pump shimming or rebuilding

    Started by Conkerbfd, 10-21-2016 12:48 PM
    • Replies: 0
    • Views: 3,040
    10-21-2016, 12:48 PM Go to last post
  21. groupk650v2

    Started by timothy, 10-14-2016 02:33 AM
    • Replies: 4
    • Views: 3,527
    10-16-2016, 07:24 PM Go to last post
  22. tigershark avaibility

    Started by Goodchildren, 08-31-2016 08:09 PM
    • Replies: 4
    • Views: 3,925
    10-11-2016, 11:01 AM Go to last post
  23. what spark plugs?

    Started by timothy, 09-25-2016 07:04 PM
    • Replies: 7
    • Views: 4,421
    10-05-2016, 11:35 AM Go to last post
  24. 2008 SXR Better Fuel Economy?

    Started by smd, 08-23-2016 08:35 PM
    • Replies: 4
    • Views: 3,904
    08-31-2016, 10:30 AM Go to last post
  25. 750 porting options?

    Started by Conkerbfd, 08-28-2016 03:23 PM
    • Replies: 3
    • Views: 3,328
    08-29-2016, 01:23 PM Go to last post
  26. Quick question - 650sx

    Started by silverado87, 05-09-2016 08:41 PM
    • Replies: 4
    • Views: 3,596
    08-24-2016, 07:34 AM Go to last post

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