Jetting & Exhaust Forum

11,170 topics in this forum

1. 421 cub jetting

   By ryskie22, October 13, 2009
   • 13 replies
   • 2.4k views
   • 
   • ryskie22
   • October 18, 2009

2. 421 cub jetting 1 2

   By Valadezj, March 12, 2013
   • 15 replies
   • 2.3k views
   • 
   • Valadezj
   • March 27, 2013

3. 421 cub jetting 1 2

   By Joejr915, May 3, 2010
   • 16 replies
   • 16.3k views
   • 
   • 252wheelieking
   • April 23, 2012

4. 421 cub jetting

   By tlh96, June 29, 2022
   • 0 replies
   • 940 views
   • 
   • tlh96
   • June 29, 2022

5. 421 cub jetting (pilot)

   By Oregon dunner, April 12, 2012
   • 11 replies
   • 3k views
   • 
   • Oregon dunner
   • May 4, 2012

6. 421 cub jetting concern 1 2

   By banshee400nut, April 4, 2010
   • 15 replies
   • 3k views
   • 
   • vulvafan537240
   • April 20, 2012

7. 421 cub jetting help

   By 350-part-guy, August 31, 2012
   • 4 replies
   • 795 views
   • 
   • Oregon dunner
   • September 3, 2012

8. 421 cub jetting help

   By pablopab50, March 22, 2016
   • 9 replies
   • 2.6k views
   • 
   • Keno
   • March 22, 2016

9. 421 cub jetting help! 1 2 3

   By bansheeboie, July 17, 2012
   • 36 replies
   • 8.8k views
   • 
   • vulvafan537240
   • November 10, 2012

10. 421 Cub Jetting Question

    By itchy, November 16, 2009
    • 5 replies
    • 1.4k views
    • 
    • itchy
    • November 18, 2009

11. 421 Cub Jetting with Mikuni

    By Loc, June 16, 2010
    • 1 reply
    • 993 views
    • 
    • bennieben1
    • October 1, 2012

12. 421 cub jetting, on 28pwk's 1 2 3 4 7

    By apeik, February 5, 2013
    • 93 replies
    • 7.2k views
    • 
    • KaN Powersports
    • November 16, 2013

13. 421 cub jetting?

    By badshee, June 4, 2007
    • 9 replies
    • 967 views
    • 
    • badshee
    • June 7, 2007

14. 421 Cub Mikuni Jetting help

    By b-nasty, July 13, 2010
    • 0 replies
    • 742 views
    • 
    • b-nasty
    • July 13, 2010

15. 421 cub on gas

    By sleeper06, June 17, 2009
    • 6 replies
    • 1.3k views
    • 
    • TeamRealtreeHD
    • June 29, 2009

16. 421 cub on stock carbs and reeds

    By steven, February 16, 2009
    • 3 replies
    • 2.2k views
    • 
    • Darthwall
    • February 17, 2009

17. 421 cub plug pics... 1 2 3

    By mike0chek, August 18, 2012
    • 30 replies
    • 3.8k views
    • 
    • mike0chek
    • October 13, 2012

18. 421 cub pwk39s jetting help

    By dantheman, July 23, 2012
    • 14 replies
    • 1.9k views
    • 
    • werner
    • August 7, 2012

19. 421 Cub questions ~ new build 1 2 3 4 6

    By dante, April 24, 2008
    • 78 replies
    • 5.1k views
    • 
    • show
    • May 24, 2008

20. 421 cub starting point?

    By cam2, November 20, 2006
    • 8 replies
    • 762 views
    • 
    • dajogejr
    • November 21, 2006

21. 421 cub with big bores?

    By bugnut, February 20, 2010
    • 6 replies
    • 892 views
    • 
    • bugnut
    • February 23, 2010

22. 421 Cub, 2 into 1

    By b_sandgren, October 12, 2006
    • 4 replies
    • 1.3k views
    • 
    • b_sandgren
    • October 12, 2006

23. 421 Cub, 300ft, +9 timing, 39mm pwks, Shearer OOF 1 2

    By J-Madd, August 16, 2007
    • 24 replies
    • 1.6k views
    • 
    • J-Madd
    • August 24, 2007

24. 421 driveline baseline jetting

    By Rossp, November 1, 2019
    • 12 replies
    • 1.4k views
    • 
    • Killacaviar
    • November 9, 2019

25. 421 driveline lp jetting? 1 2

    By jeremiahnelson15, May 24, 2017   

    • 421
    • 4 mil
    • (and 2 more)

      Tagged with:

      • 421
      • 4 mil
      • driveline lp
      • stock carbs
    • 20 replies
    • 4.3k views
    • 
    • sleeper06
    • September 1, 2017

26. 421 getting enough fuel?

    By slacker1bob, November 12, 2009
    • 6 replies
    • 1.2k views
    • 
    • dajogejr
    • November 24, 2009

27. 421 help

    By crazycanuck, June 22, 2010
    • 1 reply
    • 542 views
    • 
    • pr0blumz
    • June 22, 2010

28. 421 Help please!

    By TKJ421, April 27, 2014
    • 12 replies
    • 988 views
    • 
    • vulvafan537240
    • April 30, 2014

29. 421 in jetting help & 4mil stock drag cyl jetting help

    By bansheeboie, September 23, 2012
    • 6 replies
    • 713 views
    • 
    • sleeper06
    • September 24, 2012

30. 421 jetting

    By 2k7cheeta, February 1, 2021
    • 3 replies
    • 1.3k views
    • 
    • locogato11283
    • February 7, 2021

31. 421 jetting 34 pjs 1 2

    By bry, March 7, 2009
    • 19 replies
    • 1.3k views
    • 
    • bry
    • March 10, 2009

32. 421 jetting 39 pwk

    By sick421, June 2, 2014
    • 2 replies
    • 841 views
    • 
    • sick421
    • June 2, 2014

33. 421 jetting i aready ran it lean and

    By steven, July 13, 2009
    • 7 replies
    • 2.4k views
    • 
    • No Limit Powersports
    • July 16, 2009

34. 421 jetting question

    By yamaha11, July 9, 2009
    • 7 replies
    • 802 views
    • 
    • okbeast
    • July 12, 2009

35. 421 k&t cub needle help and jetting

    By Miller421, August 1, 2010
    • 7 replies
    • 1.2k views
    • 
    • sleeper06
    • August 2, 2010

36. 421 MX Ported Serval, which pipes, Snipers or CPI? 1 2 3 4

    By Strm Trpr, April 15, 2016
    • 54 replies
    • 6.6k views
    • 
    • ClaudeMachining
    • April 20, 2016

37. 421 needles

    By Cubshee421, January 4, 2015
    • 4 replies
    • 747 views
    • 
    • Cubshee421
    • January 4, 2015

38. 421 not reving out

    By sheeban, April 21, 2010
    • 13 replies
    • 1.2k views
    • 
    • sheeban
    • April 22, 2010

39. 421 on alky

    By rockenrail, April 9, 2009
    • 0 replies
    • 707 views
    • 
    • rockenrail
    • April 9, 2009

40. 421 on mikuni yz125 38mm carbs I think

    By midospike, June 1, 2011
    • 1 reply
    • 572 views
    • 
    • armyvet
    • June 2, 2011