Motorcycle Repair/1980 cbx 1000

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Question
Hello I am currently working on a cbx which was used as a race bike a number of years ago, Russ Collins Engine, Tony Foal Frame,I have got the bike running,(no air box velocity stacks) It will not idle below 2000 rpm for any length of time but revs freely above without hesitation. I have had the carbs down and cleaned but can see no evidence of jet sizes, can you point me in the right direction, with more years than I care to admit as a mechanic this has me stumped. regards Kenny

Answer
Hi Kenny,

The idle circuit is the culprit.  slow-running/idle is done through a very small (#35)jet which is pressed in to the tube next to the main jet rube.  if you go to the CBXclub.com website there have been numerous discussions about this.  To remove these jets you have to tap them with a small tap, insert a screw and pull the jet out.  Then clean it and re-assemble.

Let me know how you get on,

Jan

Motorcycle Repair

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Jan Ringnalda

Expertise

PLEASE NOTE: PLEASE READ THIS!!! I can help with questions ONLY on any Honda CBX-1000 motorcycle, only 1978 to 1982. OR 1981 to 1983 Honda CB1100R models ONLY Honda CBX/CB1100R motorcycles, Please NO other makes, no other models. IF YOUR QUESTION IS FOR ANY OTHER BIKE Your question MAY BE FORWARDED TO THE QUESTION POOL WHERE IT MAY NEVER BE ANSWERED. IF I ANSWERED YOUR QUESTION, and you feel the need to give me marks lower than 10, first post a follow up question. If you mark me lower, I will respond and you run the risk I will never, ever, answer one of your questions again. I'm doing this free of charge, as a service to fellow motorcyclists. If you do not value my time, I do...

Experience

Have owned over 50 of these fine classic Honda motorcycles

Organizations
International CBX Owners Association, SAE, Materials Research Society

Publications
CBXPress, VLMC magazine, Used Bike Guide

Education/Credentials
PhD in Materials Science, Post-Doc in prototyping automotive components

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