Anonymous (not verified)
11/30/2016 12:26pm
11/30/2016 12:26pm
According to Enduro21 KTM may be testing a fuel injected two stroke at the upcoming Roof Of Africa race and appears they may have already at this years Red Bull Megawatt. We know it's coming. Wonder when it's hitting production?
I'd buy another bike if Efi was an option. Been mapping 2 stroke EFI since 1992 when you actually had to re-program a chip.
The Shop
They can't register a 2017 125 for the roads here in Europe because of the emissions.
I love carbs. I'm probably the weird one though haha.
It's nothing new, it's been on snow mobiles for years now, why is moto so far behind?
I can't see weight or price effected dramatically
I don't WANT the complexity of DI but we NEED the emissions reduction.Not messing with jets is just an added bonus. This is about being able to ride. I don't even personally care about the emissions I just know that's the 2 strokes biggest hurdle.
That's what DI brings, Commi CA CARB compliance and unfortunately this is where things are headed, not away from it.
Suzuki - 2006 ltr450 was efi (and a few pros ran carb + kicker instead)
Honda - 2009 crf450 was efi
Honda - NEVER trx450r efi
Yamaha - 2010 yz450f was efi
Yamaha - 2009 yfz450r was efi
I could be wrong, but I'm pretty sure the above years are correct.
Now, as for DI, yes ski-doo has a great DI system with the e-tec. Yet, their 600rs is NOT DI, even though DI has been around since 2009 for ski doo and SDI has been around since 2006(?).
Long story short, it's not unusual to see carbs in racing.
EFI just eliminates the need for jetting. We need DI to make them viable for street use and other non closed course areas. A big one is in watercraft and eventually I see stricter laws around emissions in forest land.
Pit Row
DI isn't really cleaner. You still have scavenging. Somehow Polaris and Cat have passing CARB results for 2020 standards.
For Example, The 600 E-Tec is dirtier than Polaris Cleanfire 600.
600 Etec
64g/KWhr HC
210g/KWhr CO
600 Cleanfire
60g/KWhr HC
175g/KWhr Co
Also, where did you get your results from, that would be neat to see their tests.
Lastly, g/KWHr has to be multiplied by HP if you want to see if it is cleaner overall...cleanfire 600 is rated at 130hp and the 600 etec is 116-118hp (113 stated by BRP). This makes the cleanfire worse on hydrocarbons, comparable (but better) on Co. Yes the numbers as is show cleanfire is cleaner per HP produced.
Both of which run less than 60 lbs of pressure, compared to 500 with Etec.
Those injectors are foolproof. Ever looked at a true DI of E tec?
You have a piston, spring, etc. Shit to wear out.
And with E tec, you get NO cooling spray and first few years burndowns were plenty. I guess they have that worked out.
Cats system is really cool. Cleanfire has had many configurations depending on engine size but its always been known for being really crisp running. And you get cooling still.
Yes I'm old, get off my lawn!
This exact technology is what I'm referring to. It's already crept into PWC/boats and sleds but has't into MX bikes.
Yeah they aren't 100% clean but as you said its exceeding requirements.
You could just put a Lectron or Smartcarb on now. They claim to atomize the fuel more so than an FI system and also compensate for ambient changes.
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