Jetting & Exhaust Forum

11,170 topics in this forum

1. Dreaded Exhaust Choice 1 2 3 4

   By BBoy69, July 3, 2017
   • 46 replies
   • 5.6k views
   • 
   • trickedcarbine
   • September 3, 2017

2. Fuel leaking out of carb drain/overflow

   By Bansheexpx, September 15, 2008
   • 9 replies
   • 5.6k views
   • 
   • Bansheexpx
   • September 29, 2008

3. cpi inframe pipes with v3 reeds need jetting help 1 2

   By rjbestracing, March 26, 2007
   • 20 replies
   • 5.6k views
   • 
   • FireHead
   • March 28, 2007

4. left side gets hotter way b4 right side.

   By bansheeboie, August 7, 2012
   • 13 replies
   • 5.6k views
   • 
   • 06bluebanshee
   • March 5, 2015

5. rejetting in the cold weather?

   By shees ripin, September 13, 2006
   • 10 replies
   • 5.6k views
   • 
   • dajogejr
   • October 15, 2006

6. Vforce 4 jetting

   By maggdog, May 5, 2016
   • 12 replies
   • 5.6k views
   • 
   • Strm Trpr
   • May 7, 2016

7. Battle of the 28's... Mikuni TM or Keihin PWK ?

   By Erwin8r, April 4, 2008
   • 5 replies
   • 5.6k views
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   • JKJK
   • April 5, 2008

8. 28mm pwk keihins or 30mm oko's? 1 2

   By volcrano, September 29, 2009
   • 19 replies
   • 5.6k views
   • 
   • RagunCajun
   • October 5, 2009

9. Carbs for 421 Cub 1 2

   By ba_da_bing, February 5, 2015
   • 17 replies
   • 5.5k views
   • 
   • BANSHEEBEEFM2M
   • February 21, 2015

10. Mid range stumble 1 2 3 4 7

    By christoph.tamz, May 28, 2018
    • 99 replies
    • 5.5k views
    • 
    • trickedcarbine
    • July 3, 2018

11. The perfect Pipe for a 421 68mm bore, +4mm stroke. ? 1 2

    By EvilBanshee, October 13, 2011
    • 17 replies
    • 5.5k views
    • 
    • EvilBanshee
    • October 16, 2011

12. does 421 require bigger carbs

    By gstaten24, January 9, 2011
    • 5 replies
    • 5.5k views
    • 
    • crazycanuck
    • January 9, 2011

13. fuel pump or not to fuel pump

    By natas, March 22, 2010
    • 9 replies
    • 5.5k views
    • 
    • BLOODRAGE
    • February 25, 2012

14. FMF Gnarly pipe

    By yamaha563, April 12, 2008
    • 7 replies
    • 5.5k views
    • 
    • JordyRoo
    • March 25, 2016

15. Power core or Turbine core?

    By cjtl1000r, March 26, 2009
    • 6 replies
    • 5.5k views
    • 
    • jbooker82
    • March 26, 2009

16. 2 into 1 Dyno Port Exhaust VS. Twin pipes

    By LegalizeFreedom, June 18, 2009
    • 10 replies
    • 5.5k views
    • 
    • jbooker82
    • June 19, 2009

17. Ever cut open stock pipes? 1 2

    By rob91, August 3, 2010
    • 21 replies
    • 5.5k views
    • 
    • camatv
    • August 31, 2010

18. How do toomey T3's compare? 1 2

    By rlm2268, November 23, 2005
    • 16 replies
    • 5.5k views
    • 
    • gumby6t9
    • April 27, 2008

19. carb sync? slide position off!

    By criswrld, March 30, 2005
    • 14 replies
    • 5.4k views
    • 
    • criswrld
    • April 2, 2005

20. PVL ignition timing on a 4mill cub

    By Craig Walker, September 7, 2010
    • 6 replies
    • 5.4k views
    • 
    • Craig Walker
    • September 14, 2010

21. Weird exhaust 1 2 3 4 5

    By Guest John doe, December 7, 2015
    • 74 replies
    • 5.4k views
    • 
    • jeff n
    • December 10, 2015

22. Shearer Smallbore Inframe Pics? 1 2

    By doug, July 16, 2011
    • 18 replies
    • 5.4k views
    • 
    • doug
    • July 23, 2011

23. Still a little confused about the pilot air screw?

    By 350BANSHEE350, August 15, 2007
    • 6 replies
    • 5.4k views
    • 
    • dajogejr
    • August 16, 2007

24. Bigger carbs and jetting 1 2 3 4 5

    By Flyin_Shee, December 27, 2004
    • 64 replies
    • 5.4k views
    • 
    • Flyin_Shee
    • February 18, 2005

25. Spark Plug Heat Range Chart For Visual Comparison.

    By jayzx10r, August 6, 2007
    • 8 replies
    • 5.4k views
    • 
    • jayzx10r
    • September 27, 2007

26. 421 Serval 28mm PWK Shearer sb what jets to buy 1 2

    By Gumball12, May 6, 2015
    • 29 replies
    • 5.3k views
    • 
    • Gumball12
    • May 17, 2015

27. What pipes should I buy for my 421 serval? 1 2 3

    By sand-a-holic, June 3, 2013
    • 37 replies
    • 5.3k views
    • 
    • gomerkfx700
    • July 9, 2013

28. Jetting question- FMF Fatty pipes and Trinity 2 into 1 carb

    By ferociousllama, October 11, 2007
    • 5 replies
    • 5.3k views
    • 
    • angler
    • October 14, 2007

29. idling and needle tuning

    By Derrickc14, January 17, 2015
    • 10 replies
    • 5.3k views
    • 
    • camatv
    • February 1, 2015

30. castor 927 smokeless smoking?

    By sangheraent, June 25, 2011
    • 9 replies
    • 5.3k views
    • 
    • ginger
    • June 27, 2011

31. High elevation jetting. 4500 feet

    By Dave I., February 20, 2007
    • 11 replies
    • 5.3k views
    • 
    • bansheeseat$$
    • February 22, 2007

32. 35 PWK... Idle Advice? 1 2

    By BansheeGuy_IV, October 9, 2005
    • 22 replies
    • 5.2k views
    • 
    • BansheeGuy_IV
    • October 14, 2005

33. Pwk alcohol carbs help please 1 2

    By slobanshee, April 12, 2014
    • 22 replies
    • 5.2k views
    • 
    • JTmachining
    • January 29, 2015

34. Pwk carbs ? Cheap Chinese ?

    By Heavyd442, March 24, 2016
    • 12 replies
    • 5.2k views
    • 
    • antd913
    • March 27, 2016

35. Keihin 30mm Jetting Question

    By Flyin_Shee, August 29, 2006
    • 14 replies
    • 5.2k views
    • 
    • Flyin_Shee
    • September 29, 2006

36. Initial idle screw setting on 35mm PWK

    By JasonsBanshee, February 12, 2014
    • 9 replies
    • 5.2k views
    • 
    • SAVAGE420
    • February 13, 2014

37. jetting calculator

    By sl0wp0ke, April 1, 2013
    • 5 replies
    • 5.2k views
    • 
    • gusto
    • December 2, 2024

38. Dyno charts for pipes

    By NOS_350x, April 24, 2008
    • 11 replies
    • 5.2k views
    • 
    • dirtydownunder
    • July 1, 2008

39. OKO 30mm start point

    By TIM LUTZ, July 29, 2010
    • 10 replies
    • 5.2k views
    • 
    • TIM LUTZ
    • September 17, 2010

40. Converting pwk to alky 1 2

    By quadgod211, October 27, 2014
    • 21 replies
    • 5.1k views
    • 
    • quadgod211
    • October 31, 2014