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2006 GT
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Location: San Diego
 
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2006 GT
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UTC quote
Why does it need a foam filter instead of just plugging it off? and if it absolutely needs a foam filter what are you guys using?

thanks!
@jess avatar
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UTC quote
It doesn't absolutely need a foam filter, it's just a precaution.

The consensus from sometime back, when we first learned the ins and outs of the evap hose, was that blocking it off would make the engine run poorly, as it was (seemed to be) tuned to allow for some air to come in through that port. Try blocking it off, though. If it runs fine, don't worry about it.
@oopsclunkthud avatar
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3:5
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UTC quote
I think the evap port on the carb is the vent for the float bowl. If so it needs to be at atmospheric pressure for the carb to work right.
@boxerdad avatar
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Hooked
BV 500
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Location: Placerville
 
Hooked
@boxerdad avatar
BV 500
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Location: Placerville
UTC quote
It must depend on the application. On my injected BV it is a vacuum port that just gets capped off.
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UTC quote
oopsclunkthud wrote:
I think the evap port on the carb is the vent for the float bowl. If so it needs to be at atmospheric pressure for the carb to work right.
Ah. That would make some sense, then.
@jess avatar
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UTC quote
boxerdad wrote:
It must depend on the application. On my injected BV it is a vacuum port that just gets capped off.
Yeah, the injected engines are a totally different set of rules.
@chukstr avatar
UTC

Molto Verboso
Dragon Rosso LX 150
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Location: Pismo Beach, CA
 
Molto Verboso
@chukstr avatar
Dragon Rosso LX 150
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Location: Pismo Beach, CA
UTC quote
To answer one question, check this out Evaporator Hose Removal -- Cheap and Easy Filter
UTC

Molto Verboso
PX200E X 2
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Posts: 1934
Location: Lake Monticello
 
Molto Verboso
PX200E X 2
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Location: Lake Monticello
UTC quote
evap is blocked off on my LT. they stuck the probe up the pipe and 'tuned' it after the evap was removed and it runs great, 13K right now
@salty_dodd avatar
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Molto Verboso
(GT200L) ... no more scoot :o(
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Location: Riverside, CA, USA
 
Molto Verboso
@salty_dodd avatar
(GT200L) ... no more scoot :o(
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UTC quote
jess wrote:
boxerdad wrote:
It must depend on the application. On my injected BV it is a vacuum port that just gets capped off.
Yeah, the injected engines are a totally different set of rules.
The GTS is injected isn't it?

Is it affected by the EVAP hose?
UTC

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bv 250
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bv 250
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UTC quote
I just stuck a cheap two dollar inline fuel filter in the hose. I have had problems with condensation clogging up the filter and hurting performance on foggy mornings and I would have to blow it out. Do we really not need one ? Cause that would be great.
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UTC quote
salty dodd wrote:
The GTS is injected isn't it?
It is.
salty dodd wrote:
Is it affected by the EVAP hose?
Yes, although in a slightly different way. The most common failure case for the GTS evap system is the formation of vacuum in the gas tank, which typically causes the bike to stumble at high speeds (say 70mph) but still well below the rev limiter. This is a simple gas starvation issue, as the vacuum inhibits the gas pump from getting the proper pressure to the injector.

Unfortunately, it's a lot harder to disconnect the evap system on the GTS, and you'll usually end up cutting the hose or mangling the one-time-use clamp keeping the hose connected. You've also got to block off the port coming from the intake manifold that used to go to the evap system.
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