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unleaded fuel

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heno55
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unleaded fuel

#1 PostAuthor: heno55 » Tue Dec 15, 2015 7:54 pm

Hi I have what may seem like a dumb question it's about using unleaded petrol in bikes that were made to run on leaded fuel. Does this impact on the running of the engine as I heard that it makes the valves run hotter and it would be better to use a lead additive in your fuel. This may be just an old wives tale but there may be something in it , anyway I would appreciate any feedback from the experts here thanks in advance
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warren3200gt
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#2 PostAuthor: warren3200gt » Tue Dec 15, 2015 8:24 pm

Can't claim to be an expert but these bikes were designed to run on leaded 2 star which was pretty poor even then. I don't think anyone here runs lead additives in their z's.
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nicomkii
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#3 PostAuthor: nicomkii » Tue Dec 15, 2015 8:25 pm

Type in unleaded to the search and you should get enough info to see you right
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000zeds
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Re: unleaded fuel

#4 PostAuthor: 000zeds » Tue Dec 15, 2015 8:29 pm

heno55 wrote:Hi I have what may seem like a dumb question it's about using unleaded petrol in bikes that were made to run on leaded fuel. Does this impact on the running of the engine as I heard that it makes the valves run hotter and it would be better to use a lead additive in your fuel. This may be just an old wives tale but there may be something in it , anyway I would appreciate any feedback from the experts here thanks in advance


The Zs were not made to run on leaded petrol :!:

The main market for bikes made in Japan was the USA and unleaded petrol has been there for a long time :!:
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heno55
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#5 PostAuthor: heno55 » Tue Dec 15, 2015 9:27 pm

nicomkii wrote:Type in unleaded to the search and you should get enough info to see you right
thanks I should of thought of that I just did and got lots of info I'm happy enough with my 1980 z1 classic as she was built for the American market , but I've been offered the chance of a 1975 kz900 that might have been the one assembled in the USA and my thoughts are that 1975 might have been early for unleaded .
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000zeds
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#6 PostAuthor: 000zeds » Tue Dec 15, 2015 9:42 pm

I had a 1975 Z1B from 1979 to 2013 and it ran OK on unleaded.
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heno55
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Thanks

#7 PostAuthor: heno55 » Tue Dec 15, 2015 9:48 pm

Thanks for the swift reply lads I'm happy enough to continue on with the unleaded
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floydsz1
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#8 PostAuthor: floydsz1 » Tue Dec 15, 2015 10:51 pm

Virtually every jap bike built was designed to run on unleaded. There was a few exceptions though but not the zed's .unleaded is fine
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