Cylinder Jetting:

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petcelman
ICOA Member
ICOA Member
Posts: 4
Joined: Wed Nov 21, 2012 11:34 pm
Location: Fernley NV USA
Location: Fernley NV USA

Cylinder Jetting:

Post by petcelman »

I am new to CBX's and this club but am an old hand at mechanical stuff (37 years as a tech or shop owner) I have a 5 gas analyzer and built a set of header pipes with O2 sensor ports. When I run the engine and observe the O2 readings I am getting approx the same readings. Should I jet the inner cylinders a bit more rich to help with heat reduction? We get some heat during the summer. Rich = cooler combustion temps. Is it worth the hassle?

daves79x
ICOA Technical Director
ICOA Technical Director
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Joined: Sun Oct 01, 2006 8:05 am
Location: Knox, PA
Location: Knox, PA

Re: Cylinder Jetting:

Post by daves79x »

Welcome to the forum and club! As to your question - I've never heard of jetting middle carbs richer on the CBX - but understand your concern. These do run hot, especially in hot weather. My best advice would be to avoid prolonged idling in extreme heat at any cost - over time this weakens rings and hardens all rubber components in and near the engine. Synthetic oil wil help also, if your starter clutch tolerates it.

Dave

EMS
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Joined: Wed Mar 05, 2003 7:55 am
Location: North East OH, ICOA 3904

Re: Cylinder Jetting:

Post by EMS »

A larger oil cooler may also be a remedy. Depending on what model you have, you may also see a slight improvement by installing the front fender with the air spoiler from a later model or a an "F", which will improve air flow to the inner cyclinders. Not much, but every little bit helps.

petcelman
ICOA Member
ICOA Member
Posts: 4
Joined: Wed Nov 21, 2012 11:34 pm
Location: Fernley NV USA
Location: Fernley NV USA

Re: Cylinder Jetting:

Post by petcelman »

I had heard the engines have a heating issue when idling in warm weather. I live in an area that doesn't have mush traffic so I don't anticipate any extended idle time but thanks for the feedback.

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