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Old 1 Week Ago   #46
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Re: Carburettor problems?

Pulling the 'choke'into operation enriches the mixture, which will and can, cause the engine to run roughly. If it will start from cold (but how 'cold' is 'cold?) it probably means the mixture is a shade on the rich side. However, if it is running and idling well, leave as is.
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Old 1 Week Ago   #47
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Re: Carburettor problems?

Thank you for your reply. Cold is about 28 degrees Celsius

Now that you reference it, i did try a main jet that was 120 instead of the 112 that was there. But the main jet is not used when idling, or is it ?
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Old 1 Week Ago   #48
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Re: Carburettor problems?

To us, 28C is ruddy warm! We have had hardly any days this summer that have got that warm. You are correct in thinking that the main jet does not come into operation until about 1/2 throttle; 120 does sound a mite large. Unfortunately, I am well away from home at the moment (looking after grandaughter), but when I get home on Sunday, I will see what was in my IMB before I changed it for the FZD.
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Old 6 Days Ago   #49
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Re: Carburettor problems?

I had a great chart for motorcycle carbs that illustrated the various circuits in use during idle to flat out acceleration. Not directly applicable but the mains should only come into play in the last 1/2 to 1/3 of throttle. During idle it is obviously the idle circuit that should be doing the work and changing the mains will have no effect. If you find at full throttle itís feeling fuel starved, larger mains may help but obviously only to a point on these tiny cars. It would be easier if they had a proper tach you could observe. Iíll try to find the link to the chart
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Old 6 Days Ago   #50
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Re: Carburettor problems?

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