 |
02-06-2010, 04:16 PM
|
#1
|
|
Senior Member
Feedback Score: 1 reviews
Join Date: Dec 2008
Location: Southern, California
Posts: 1,540
|
Backfiring----Valves???????
Ever since I put the Yoshi duals on, it's been backfiring on decel under load in all ranges---Have played with a/f screw changed jetting up and down---Have never been able to fix it---It starts good and runs strong---I did find some leaks in the exhaust connections but way back by muffler.
Can't get to the leaks so I just pulled off the whole system and put on another brand new set of duals---Pro Circuits---And crap---It backfires worse with them on and there is no exhaust leak anywhere.
The only 2 things I haven't looked at is the pilots to see if they are dirty or clogged or checked valve clearance---I've held off on the valves as so many have posted up what a bucket of worms they opened---Actually R&R'ing the the air filter box is for some reason more intimidating to me than the valves.
If you guys have any other suggestions please post up---I'm sure if I mess with the valves I'll be back on here whining about something 
Kenny
__________________
 "As For Me And My House We Shall Serve The Lord"
2007 KFX 700 V Force------"DIY MODS"-----Pink Spring---Yoshimura Duals---12 Hole Mod---Twin Air Power Kit---1 Shim & Cut Springs---Polished Slides--- 3.0 turns out---#40 Pilots---182F/185R---Spark Plug Boot Mod-----------"OTHER STUFF"---Odi grips---Full Under Armor---Billet Stator Cover---HID Lights---Trail Tech Vapor---Pro Armor Front Bumper---Rear 6 Pack Rack---Nerfs--22x11x10 Haulers 10 Paddle---22x11x10 Edges 9 Paddle---Quick Release Lighted Whip---IMS 4.6 Gas Tank
2005 Honda Rancher 350ES
The Avatar picture is my custom home for sale in Yucca Valley, So. Calif.
|
|
|
|
02-06-2010, 04:46 PM
|
#2
|
|
Super Moderator
Feedback Score: 15 reviews
Join Date: Dec 2004
Location: Canada eh!
Posts: 17,831
|
How many turns out are your fuel screws?
__________________
OrangeCrush RR Boosted / Nitrous Injected Duner Fundy Performance Sports 1-902-893-(DYNO) 3966 1) Bench Racers 2) Racers who never actually run into the Big Dog
3) Racers who win everything until they meet up with the Big Dog
4) The Big Dog
CUSTOM FABRICATED TURBO EXHAUST / JH MACHINE CUSTOM ROLLER CLUTCH - Godspeed Jim
|
|
|
|
02-06-2010, 05:33 PM
|
#3
|
|
Senior Member
Feedback Score: 1 reviews
Join Date: Dec 2008
Location: Southern, California
Posts: 1,540
|
Quote: Originally Posted by Camo
How many turns out are your fuel screws?
They are 3 turns out
__________________
"As For Me And My House We Shall Serve The Lord"
2007 KFX 700 V Force------"DIY MODS"-----Pink Spring---Yoshimura Duals---12 Hole Mod---Twin Air Power Kit---1 Shim & Cut Springs---Polished Slides--- 3.0 turns out---#40 Pilots---182F/185R---Spark Plug Boot Mod-----------"OTHER STUFF"---Odi grips---Full Under Armor---Billet Stator Cover---HID Lights---Trail Tech Vapor---Pro Armor Front Bumper---Rear 6 Pack Rack---Nerfs--22x11x10 Haulers 10 Paddle---22x11x10 Edges 9 Paddle---Quick Release Lighted Whip---IMS 4.6 Gas Tank
2005 Honda Rancher 350ES
The Avatar picture is my custom home for sale in Yucca Valley, So. Calif.
|
|
|
|
|
02-06-2010, 08:24 PM
|
#4
|
|
Premium Member
Feedback Score: 4 reviews
Join Date: Oct 2009
Location: Las Vegas, Nv
Posts: 467
|
I'd check the valves anyway if you feel you can just to eliminate one more thing.
__________________
04 KFX700, HMF Duals, Dynatek CDI, #42 pilots, American Star Racing 2" extended A-arms, G-Force Honda 400EX extended rear hubs, 22-7-10 Sand Stars in front, 24-11-10 8 paddle Extremes in Rear, K&N air filter, AC Nerfs & Six pack rack
86 Toyota 4X4, 4.3L Chevy V-6, 700R-4 trans, Marlin Crawler dual transfer case, limited-slip front diff, ARB rear diff, custom flatbed w/aluminum diamond plate insert, Super Swampers for trails & Desert Trac paddles for sand
|
|
|
|
|
02-06-2010, 10:17 PM
|
#5
|
|
Senior Member
Feedback Score: 0 reviews
Join Date: Apr 2009
Location: Albany, OR
Posts: 168
|
I had the same issue I got 42 pilots and was able to tune it out now I never have any popping.
__________________
04 kfx 700 orange 12 hole, twin flow, PRO circuit exhaust, EPI maroon spring, 24" haulers, 6 degree key, UPP intake, 188f 185r 42 pilots, plug wire mod, VFJ stage 3, Road Magnet springs
|
|
|
|
|
02-08-2010, 03:40 PM
|
#6
|
|
Junior Member
Feedback Score: 0 reviews
Join Date: Feb 2007
Location: Omaha, NE
Posts: 17
|
Had same issue when I put my HMF's on changed out the pilots to 42's fixed the issue
|
|
|
|
|
02-08-2010, 04:03 PM
|
#7
|
|
Senior Member
Feedback Score: 2 reviews
Join Date: Sep 2004
Location: Nova Scotia, Canada
Posts: 2,570
|
It's probably lean and needs bigger pilots as others have pointed out, but check the valve clearance anyway. It's part of scheduled maintenance and needs to be done.
__________________
2002 665 FPS Prairie
FPS Trail kit - 12:1 comp due to 1mm shaved off the heads
Mild porting
Crossover intakes
Modded airbox
Full Muzzy
Dalton springs and weights
Other stuff
|
|
|
|
|
02-10-2010, 05:58 PM
|
#8
|
|
Senior Member
Feedback Score: 1 reviews
Join Date: Dec 2008
Location: Southern, California
Posts: 1,540
|
Appreciate the posts---If I change out the pilots from #40's to #42's, (most of the threads recommend this when UPP's are added but not for stock), if it's too much/too rich how will I know in the seat---What should be a good indicator that it needs to go back to #40's.
Today is Wedn. and I might be leaving tomorrow nite to do about 150 miles of riding---I don't want to do anything that will screw it up---As it starts fine and runs well except for constantly backing off on decel---I love the rumbling sound of it but can't be any good for it to run this way---Also the rear exhaust has been showing black carbon/soot lately, (at 182/185)--I don't have any other jets, but was thinking of trying to change the front to the rear, (185/182), just to see if it does anything noticable.
When I get back will definitely look at valve clearance too---Thanks
Kenny
__________________
"As For Me And My House We Shall Serve The Lord"
2007 KFX 700 V Force------"DIY MODS"-----Pink Spring---Yoshimura Duals---12 Hole Mod---Twin Air Power Kit---1 Shim & Cut Springs---Polished Slides--- 3.0 turns out---#40 Pilots---182F/185R---Spark Plug Boot Mod-----------"OTHER STUFF"---Odi grips---Full Under Armor---Billet Stator Cover---HID Lights---Trail Tech Vapor---Pro Armor Front Bumper---Rear 6 Pack Rack---Nerfs--22x11x10 Haulers 10 Paddle---22x11x10 Edges 9 Paddle---Quick Release Lighted Whip---IMS 4.6 Gas Tank
2005 Honda Rancher 350ES
The Avatar picture is my custom home for sale in Yucca Valley, So. Calif.
|
|
|
|
|
| Thread Tools |
|
|
| Display Modes |
 Linear Mode
|
|
Posting Rules
|
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
HTML code is Off
|
|
|
Similar Threads
|
| Thread |
Thread Starter |
Forum |
Replies |
Last Post |
|
help please bf 750 backfiring
|
chine |
Kawasaki Brute Force/Prairie/Bayou |
20 |
10-28-2009 08:17 PM |
|
BAckfiring??
|
sticky1 |
Kawasaki Brute Force/Prairie/Bayou |
3 |
05-09-2005 06:01 AM |
|
BackFiring
|
WV-VRider |
Kawasaki KFX700 V-Force |
4 |
09-27-2004 10:38 AM |
|
Backfiring!!
|
Soggybottomboy |
Kawasaki Brute Force/Prairie/Bayou |
21 |
09-19-2004 01:12 AM |
|
backfiring
|
rubicon20032003 |
Kawasaki Brute Force/Prairie/Bayou |
0 |
07-01-2004 07:21 PM |
|
|
» Site Navigation |
|
|
|
