Aermacchi Z90 rebuilt and leaking
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Stage III
Joined: Sep 2015
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From: Concord, CA
Aermacchi Z90 rebuilt and leaking
Hey everyone, this is my second post -- the first was about troubleshooting my z90 to start after a rebuild, and now I've got it started but encountered a messy exhaust leak!
The z90 leaks heavily from the cylinder-exhaust joint, and further down where the exhaust joins the muffler (2-4 drops/second). It does not appear to leak elsewhere. I am missing the gaskets for both joints (not easy to get a hold of... help if you know a good supplier). Regardless, although a little condensation and extra smoke are expected after a rebuild, it shouldn't leak that fast. I spoke with one parts supplier and he thinks "it could be gas getting by the float valve and into the cylinder while it's sitting and making it's way out running. The float valve may be bad or not adjusted correctly".
Any other ideas? Adjustments?
I've attached a video I took in celebration of getting it started. It shows the idle speed is high (I believe), it smokes heavily and is dripping pretty fast onto the rag underneath. Sorry, I don't have a video just of the leaking areas.
The z90 leaks heavily from the cylinder-exhaust joint, and further down where the exhaust joins the muffler (2-4 drops/second). It does not appear to leak elsewhere. I am missing the gaskets for both joints (not easy to get a hold of... help if you know a good supplier). Regardless, although a little condensation and extra smoke are expected after a rebuild, it shouldn't leak that fast. I spoke with one parts supplier and he thinks "it could be gas getting by the float valve and into the cylinder while it's sitting and making it's way out running. The float valve may be bad or not adjusted correctly".
Any other ideas? Adjustments?
I've attached a video I took in celebration of getting it started. It shows the idle speed is high (I believe), it smokes heavily and is dripping pretty fast onto the rag underneath. Sorry, I don't have a video just of the leaking areas.
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Joined: Jul 2014
Posts: 80
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From: Santa Ana
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Joined: Feb 2008
Posts: 73
Likes: 1
those del orto carbs are bad for leaking,
probley needle valve, keep an eye on oil,
ive had it fill the bottom end full of gas, smell the oil
the carb kit is still avail.
hd sprint . com has some good info on for the mochi
probley needle valve, keep an eye on oil,
ive had it fill the bottom end full of gas, smell the oil
the carb kit is still avail.
hd sprint . com has some good info on for the mochi
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