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What do I get for the next bike?

Caleb

Caleb

Well-Known Member
Location
Riverton
You should get an in-tank pre-filter. FI bikes are a different game, you need to make sure you filter your fuel big time otherwise you will end up with a clogged system. Most KTM guys will also put another filter after the tank.
 
glockman

glockman

I hate Jeep trucks
Location
Pleasant Grove
In my experience when you need to adjust valves on a yamaha, a new motor is most likely in the very near future.

Sent from my HTC One using Tapatalk
 
Gravy

Gravy

Ant Anstead of Dirtbikes
Supporting Member
Location
The Land Northward (Bountiful), Utah
Caleb said:
You should get an in-tank pre-filter. FI bikes are a different game, you need to make sure you filter your fuel big time otherwise you will end up with a clogged system. Most KTM guys will also put another filter after the tank.
Click to expand...

You're on the same wavelength as me. I'm going to get a in-tank sock style one.


I thought, while I'm at it. I better clean the injector. So out came the airbox.










And it's all clean. I basically just followed the how-to on a Youtube video for a KTM, but injectors are so similar that it worked just fine.
It was actually quite clean.

I'm mostly concerned about what the plug is telling me. It seems it's running rich. Which explains why fuel consumption has been so high in these races.
It likely is a function of the clogged filter. The fuel system thinks it's running lean and dumps extra fuel which may explain the black plug.

http://www.dansmc.com/Spark_Plugs/Spark_Plugs_catalog.html
Is one chart I used

and another
http://www.thumpertalk.com/wiki/_/why-spark-plugs-can-make-or-break-your-bike-r357
 
Greg

Greg

I run a tight ship... wreck
Admin
Location
Grand Junction, CO
Gravy said:
With all the extra stuff, it's still better than rejetting every time I ride at a different elevation.
Click to expand...

I know what you're saying and I agree, I've ridden over 12k' elevation without issue in that regard. The 690 has had some EFI/Ethanol-related running issues that have kept me from riding and I'm getting tired of it. I'm OK with dealing with a carb, after my EFI problems.
 
Gravy

Gravy

Ant Anstead of Dirtbikes
Supporting Member
Location
The Land Northward (Bountiful), Utah
I could see that as a big issue. Corn is in almost all gas now.

The biggest benefit I can see is the smooth transition from part to full throttle during climbs. There just is no hiccup at all. It's just power whenever I want it....
Even if I'm 2 hours into a race and the bike is trying to kill me...
 
Gravy

Gravy

Ant Anstead of Dirtbikes
Supporting Member
Location
The Land Northward (Bountiful), Utah
I just ordered a new Pump with a lifetime warranty from HighFlowFuel.com
http://www.highflowfuel.com/i-14472791-new-30mm-intank-efi-fuel-pump-yamaha-yz450f-2010-2014.html
New 30mm Intank EFI Fuel Pump Yamaha YZ450F 2010 - 2014

SKU: HFP-389
The HFP-386 is a T35 (originally made by Mitsubishi) fuel pump for late model EFI motorcycle and ATV/ UTV applications. Please email us a picture of your pump if your model is not listed here.

HFP replacement fuel pumps, modules, and assemblies are designed to meet or exceed OEM specifications, and feature upgrades that improve on the OEM design. Upgraded polymers, brushes, and commutators ensure long life and durability in multiple fuel blends. Each HFP fuel pump is backed by a lifetime free replacement warranty. If there is any issue of any kind at any time, give us a call or email us and we will replace the pump free of charge.

Features & Benefits:

OEM or better performance
Specifically designed for quiet operation (HFP pumps do NOT whine like other aftermarket fuel pumps)
Drop-in replacement
Gradient density fuel strainer for superior contaminant filtration
Patented check valve technology
Designed for use with E85/ ethanol
FREE USPS 2-Day shipping to the Continental US.

F100375500.jpg
$69 with 2 day free shipping sounds a heck of a lot better than $400 from Yamaha.

I just hope it is correct.
 
jeeper

jeeper

I live my life 1 dumpster at a time
Location
So Jo, Ut
Good article. I have been claiming the same thing my whole life.. I just don't have the resources to prove it :)

Of course it does compare CC's. Nobody buys a 250f and expects it to compete with a 450f. The 2T's are expected to run with the 450f's. It would be interesting to see the same shootout with a 2t and 450f.
 
Tonkaman

Tonkaman

Well-Known Member
Location
West Jordan
That is a great article. I like how objective they are about each bike and how you perceive results that may actually be different. I also learned that I like 4 strokes because it is an idiot proof ride
 
Gravy

Gravy

Ant Anstead of Dirtbikes
Supporting Member
Location
The Land Northward (Bountiful), Utah
So, I reassembled the top end on my bike today.
Added a new E3 spark plug.


Just a part # for my own reference.


Cleaned the inside of the fuel pump
Brand new lifetime warranty fuel pump



Filter is significantly larger on the new pump.


Reassembled everything and it started and ran so I guess I did it right.
Then I readjusted the free-play gain on the Rekluse and rode it a bit.
I'll have to go on a test ride this week, and probably will slap on a new tire for the Firebird's race
 
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