GZ250 carb space

Flathead · 01-21-2017, 05:03 PM

Flathead here.
Here are some pictures of how to make use of limited space. The filter housing was made with lost foam method.
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Water Warrior 2 · 01-21-2017, 10:31 PM

Where did you find the black housing between the carb and air filter?

Flathead · 01-22-2017, 09:16 AM

The housing was built by me. I needed to put the oem carb in space indicated by fist in picture. I wanted a filter also. I took some flower arrangement foam and shaped the part. You have to get all the details in your foam part right before you fiberglass it. After glassing it & allowing to dry, pour gas through it & the foam runs out. TADA! You have a part.
This sounds easy but the reality is that in tight spaces such as this you will have a few failed attempts.
The reason it looks the way it does with filter on end is the carb needs a measured volume of air to operate the diaphram & needle. Usually the filter is behind carb with box wrapped around it & a small intake hole located on box somewhere. I just changed the set up to have the measured volume behind carb with filter on small intake hole. Same outcome just different arrangement. The volume of air & intake hole size are important. The folks that just add pods to oem cv carbs are often taken for a tuning nightmare of a ride without an end. If you are going to change a filter set up on oem cv carbs you have to be a thinker to get it right. The carb has 130 main & 30 secondary with oem idle jet. No stall or lulls at any throttle position, just hard pull through gears.

Water Warrior 2 · 01-23-2017, 03:21 AM

WOW! Sounds like a lot of work but the results are good.

Mlamey · 07-24-2021, 06:03 AM

What's up with that mono shock ? Does mine have that ? Lol I haven't looked . Don't remember noticing it.

Vegas Street Rider · 07-24-2021, 01:01 PM

The mono shock is not stock. This was part of a cafe racer project, if I remember right.

01-22-2017, 09:16 AM	#3
Flathead Junior Member Join Date: Jul 2016 Location: Louisiana Posts: 16	The housing was built by me. I needed to put the oem carb in space indicated by fist in picture. I wanted a filter also. I took some flower arrangement foam and shaped the part. You have to get all the details in your foam part right before you fiberglass it. After glassing it & allowing to dry, pour gas through it & the foam runs out. TADA! You have a part. This sounds easy but the reality is that in tight spaces such as this you will have a few failed attempts. The reason it looks the way it does with filter on end is the carb needs a measured volume of air to operate the diaphram & needle. Usually the filter is behind carb with box wrapped around it & a small intake hole located on box somewhere. I just changed the set up to have the measured volume behind carb with filter on small intake hole. Same outcome just different arrangement. The volume of air & intake hole size are important. The folks that just add pods to oem cv carbs are often taken for a tuning nightmare of a ride without an end. If you are going to change a filter set up on oem cv carbs you have to be a thinker to get it right. The carb has 130 main & 30 secondary with oem idle jet. No stall or lulls at any throttle position, just hard pull through gears. Login or Register to Remove Ads
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07-24-2021, 06:03 AM	#5
Mlamey Junior Member Join Date: Jul 2021 Posts: 14	What's up with that mono shock ? Does mine have that ? Lol I haven't looked . Don't remember noticing it. Login or Register to Remove Ads
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01-21-2017, 10:31 PM	#2
Water Warrior 2 Senior Member Join Date: Dec 2006 Location: Squamish B.C Canada Posts: 11,409	Where did you find the black housing between the carb and air filter?
	0

01-23-2017, 03:21 AM	#4
Water Warrior 2 Senior Member Join Date: Dec 2006 Location: Squamish B.C Canada Posts: 11,409	WOW! Sounds like a lot of work but the results are good.
	1

07-24-2021, 01:01 PM	#6
Vegas Street Rider Senior Member Join Date: May 2015 Location: Henderson, NV Posts: 1,108	The mono shock is not stock. This was part of a cafe racer project, if I remember right.
	1