2020 csc tt250

NateTt250 · 09-28-2024, 11:30 PM

Where do these lines connect to? I think a few of them are mixed up but I can’t find a proper diagram for them or anything in videos. My bike isn’t starting at all and I’m not sure if this is the cause

Thumper · Yesterday, 06:00 AM

Looks like a vacuum line for you EGR valve. Not necessary, at least won't keep it from running. But if the vacuum source that plugs into is not plugged, it could make it hard to start.

NateTt250 · Yesterday, 03:35 PM

Quote:

Originally Posted by Thumper

Looks like a vacuum line for you EGR valve. Not necessary, at least won't keep it from running. But if the vacuum source that plugs into is not plugged, it could make it hard to start.

I’m pretty new to this and have no idea where they should be connected to

superjocko · Today, 11:50 AM

The hose in your first photo is supposed to attach to a fitting on the intake manifold. The intake manifold is the black rubber piece between the cylinder head and the carburetor.

The fitting on the side of the carburetor is the float bowl vent. If the bike is equipped with an evaporative emissions canister, it connects to one of the fittings on the canister. The canister is a round black piece about the size of a regular can of soup and would be located under the left side fairing. The other fitting on the canister is for the fuel tank vent hose. If your bike is no longer equipped with a canister (someone removed it), you can simply connect a length of hose to that fitting on the carburetor and route it down under the bike, alongside the hose that comes off the bottom of the carburetor, which is the float bowl drain hose.

superjocko · Today, 11:54 AM

Quote:

Originally Posted by Thumper

Looks like a vacuum line for you EGR valve. Not necessary, at least won't keep it from running. But if the vacuum source that plugs into is not plugged, it could make it hard to start.

It's a pulsed air injection valve, not an EGR (exhaust gas recirculation) valve.

CheapThrills · Today, 03:09 PM

Quote:

Originally Posted by superjocko

It's a pulsed air injection valve, not an EGR (exhaust gas recirculation) valve.

Never understood why the low temp hoses and everyone calls them EGR valves too.

3 lines I found on my bike, 1 sensing line(being held), a line to draw filtered air from airbox, and last line to feed air on exhaust to allow cat to work fully.

Some people cap and remove lines, since cats usually go wayside, but know this maybe this will help you figure what to do.

Tell us what you decide and love sharing of photos.

09-28-2024, 11:30 PM	#1
NateTt250 Join Date: Apr 2024 Posts: 4	2020 csc tt250 Where do these lines connect to? I think a few of them are mixed up but I can’t find a proper diagram for them or anything in videos. My bike isn’t starting at all and I’m not sure if this is the cause Attached Thumbnails
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Yesterday, 06:00 AM	#2
Thumper Join Date: Feb 2021 Location: Kansas City Posts: 2,648	Looks like a vacuum line for you EGR valve. Not necessary, at least won't keep it from running. But if the vacuum source that plugs into is not plugged, it could make it hard to start. __________________ -NOS 2020 KTM 250SX (2-stroke motocross)
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Today, 11:50 AM	#4
superjocko Join Date: Aug 2022 Location: Lincoln CA Posts: 133	The hose in your first photo is supposed to attach to a fitting on the intake manifold. The intake manifold is the black rubber piece between the cylinder head and the carburetor. The fitting on the side of the carburetor is the float bowl vent. If the bike is equipped with an evaporative emissions canister, it connects to one of the fittings on the canister. The canister is a round black piece about the size of a regular can of soup and would be located under the left side fairing. The other fitting on the canister is for the fuel tank vent hose. If your bike is no longer equipped with a canister (someone removed it), you can simply connect a length of hose to that fitting on the carburetor and route it down under the bike, alongside the hose that comes off the bottom of the carburetor, which is the float bowl drain hose. __________________ -2024 CSC TT250, stage 3 motocult kit, Nibbi PE28FL with custom-made cable controlled choke, modified stock muffler (larger diameter tailpipe), custom oil cooler installation with relocated stock evaporative emissions canister, oversized stainless steel footpegs, IMS folding tip shifter, a few little blingy bolts and bits. More personal preference mods to come.
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