Carb Mod-ACC Pump.AVI

Want better performance out of your carb? Here is a few of the tips that are used by Team Am-Pro Yamaha.

[@For3v3rLove2]

I’ve got an older 450 and it already has the first mod(awesome response btw) all the carbs are the same btw on all bikes unless they are efi don’t know too much about those. The second mod is a great idea!!

[@mangleman9112]

JUST RUN THE TWO TOP VENT LINES OVER THE TOP OF THE REAR SHOCK INTO THE TOP OF YOUR AIR BOX, NO CHANCE OF THEM GETTING BLOCKED OR OBSTRUCTED IN THERE - GENIUS WYLIE, YOU'RE A GENIUS!! MEEP-MEEP!!

[@famousmidnight]

Probably the best two pieces of advice on KZbin.

[@TheMadVector]

Mentionable: This FCR 41 MX Carb already has the blue (stronger) spring attached. Original is green and softer. The blue stronger spring should shorten the time of fuel injection in it's way. I don't wanna say this is enough, but it is probably mostly necessary to fight the problem this video is about. As a part of it. There's a lot to do to reach perfection with precision in all possible circumstances/setups. This still is a nice video and a good idea.

[@philippethiry7690]

Superb Dude! I spent hours trying to solve this and your genius did it in minutes. You rock!

[@bobo441978]

Didnt know that about the 2 vent lines definitely gonna do that asap. I use a rubber o-ring on my ap but this looks a lot more durable as an o-ring can stretch over time and break. Thanks for the info!!!

[@rumad19]

Love it, I have my carb sitting right next to me now and I was looking for something else but saw your vid and hit it.. Glad I did! Thanx!!

[@robertwoods2505]

Great video. Thanks for sharing!

[@ottovp]

Nice tip for the upper tubes!

[@justins4d]

I was able to fix it, I did a 100 leak jet and this mod then it worked flawlessly. But then after a few months of riding it came back. I may just have to re safety wire it. Thanks!

[@2010BMR]

use a #78 O-ring from the hardware store. More give, less risk. Then again get the Boysen slingshot 3

[@Trumplican]

if the bottom 2 hoses were to get plugged and your other two are in the air box that would effectively pressurize your carb to the atmosphere of the airbox and cause a lean condition. It would be better to connect all 4 hoses to the airbox and re-jet.

[@rallyrats]

Awesome stuff, can't wait to try it out

[@supermotopilot1]

great video, you can see where to put the safety wire, instead of just saying to safety wire the pump, thanks.

[@vegasromaniac]

you ROCK . I will try that immediately ! my 400 dollars r&d bowl didn't fix shit, if your wire fix will work , I will send you 1 billion bitcoins, once the bit coin market crashes :D

[@jakobbrostrup]

Vegas RoManiac Did it work out for you Vegas?

[@EastGillyOutdoors]

Now is the time to send that Bitcoin. I will take some too!!

[@REM44MAG]

I can't believe this fixed my issue on my te510... I took it to 2 different shops, one said nothing was wrong, the other cleaned the carb still the same issue, and again they said nothing was wrong. Did this and vola, instant throttle response. I am just wondering the draw back to this, it had to been designed that way for a reason??

[@jonathanschave1661]

what would be the point of putting only one of those air lines from the t fitting on choke side when the other one goes into muddy water???? put all "3" in the airbox-or just cut and plug up one.

[@This0is0pointless]

I made my own stiffer spring for the pump lever which helped alot but starts bogging after it's rode awhile, also tried adding an oring, helped but still pulls off, if I wire it the plastic lever flexes what's the deal here?

[@simonjmeyers]

How does this affect adjustability? Looks like that wire would be in the way?

[@crz400]

great tip!!!!

[@VanillaGorilla750]

Perfect video for this thank you

[@wrightgang]

The two hoses you show to route to the air box are connected to a t fitting that has another hose coming from same port out of the carb, what's the use of doing this mod unless you run all four hoses to the air box?

[@collindoty9775]

With this mod do you unscrew the screw so the plastic peace if flush ?

[@acidtoxin]

Hi, usefull tips. Can you provide some details about jetting (WR450F 2003 with LeoVince X3, grey wire mod, acc mod, 430-600 feet above mean sea level , air temperatures 50'F-80'F)?

[@ic_clearly]

A little late to the party.., but have they addressed this issue in these carburetors at the factory yet?

[@911RescueDiver]

thx boss!

[@MrGeko469]

Highly, Highly suggest using the safety wire and not zip tie- doing as the vid shows,

[@justins4d]

Great video! Only problem, it didn't work for mine :/ Any ideas what it may be? Thought it was the leak jet, all the jetting is stock. 02 yz250F, idle to WOT it bogs and can die. Like its not feeding it fuel. Any ideas would help a lot, thanks for the video!

[@dsgamingmore8212]

bb429power After 4 years have you solved the issue?

[@dsgamingmore8212]

bb429power Exact same problem I'm having all stock jetting almost everything is new and even ordered a quickshot 3

[@keithy363]

Any chance you could do a vid for the throttle stop mod on a 08 wr250f

[@mathewnaake4351]

Keith goggle a PDF on this make of carby and should have the full brake down let me know how you go and if you do'nt have any luck I'll have a talk to our old friend Mick Garrety his good with bike stuff. Naakers.

[@TBone1234561]

Is their an after video?

[@8pietia]

does it work with 2007 WR450F ??