Question about 1987 Yamaha FZ 600

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Project bike. just got it running. runs fine with choke on. with choke off it runs rough. i discovered that it is supposed t take at least 91 octane and has 87 in it. would this make it run rough and not idle well.

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Yes It Would Its A Higher Octane And Much More Clean, But You Should Get Your Fuel Line To See If It Has A Kink In It That Could Be The Problem As Well But Im Sure Its The Fuel

Posted on Jun 27, 2009


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When ever I ride my Discover 125CC,2005 model after washing it gets choked/missing.It gets difficult to even start it.After starting it doesnt move without applying the choke.When i went to the service...

I had the same symptoms with a 1980 Kawasaki LTD. I couldn't ride in the rain, because it would miss and shut down. For my bike the problem was cracked coils. Any water at all getting in the coils will short the electrical path to the spark plugs. Check your coils, especially around the wire leads for any cracks or openings.

If the bike just runs better with the choke on, it sounds more like the fuel/air mixture is just too lean. Make sure you have the correct air filter properly installed, and the carburator is adjusted properly.

Good luck!

Jan 11, 2011 | 2006 Bajaj Discover DTS-I

1 Answer

My Bajaj Discover 125 DTSi showing a problem that whenever the vehicle ride through rain or after washing, chocking / missing happens. Bike starts but not able to move when we load gear and releases...

Dear Friend,

I was also facing the same problem with my Discover125 for a while.When i went to the service centre they said it happens with most of the Discover users.According to them there may be a possiblity of water going inside the Carburator and due to that this missing is happening.Earlier my choke was not working, but now i have rectified my choke assy and i use the choke when ever i face this problem and the bike runs ok. Even though i am not able to solve this problem permanently, i can ride my bike without much problem.Still i am trying to solve this problem permanently.If you find any solution please mail me to

Best regards..
Robert Mathew

Dec 18, 2010 | 2006 Bajaj Discover DTS-I

2 Answers


I think you are exactly right. Sounds like you have some clogging in your idle jets and probably in need of a carb tune up. if you havnt replaced or cleaned your air filter in a while, now would be a good time to do that as well, being that some filters begin to break down and pieces of them get into the carb ports and cause clogging.

Nov 22, 2009 | 1999 Honda VT 1100 C3 Shadow Aero

1 Answer

The bike has sat for ages and i pulled out the carbies and cleaned them and changed the plugs it runs really rough up to about 1/4 throttle then its fine.what might be the problem?

how does it run while the choke is on....the choke circuit over rides or enhances the pilot circuit... most likely repair would require re-servicing the carb bank & spend more time on the pilot system...u must remove these jets to repair properly.

Nov 05, 2009 | 1982 Yamaha XJ 650

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its your choke. when the choke is to the left it will sputter around. try moving the choke completely to the right. mine does the same thing u just have to run the choke on the right side. i dont know if its supposed to be on the left or right but if u push it ALL the way to the right it should be fine. my kawasaki 360 prairie is pushin 55 mph so i think i have it set up right.- Kyle

Jul 23, 2009 | kawasaki Quad Bikes

1 Answer

Runs fine for a few miles then starts bogging and

it seems the bike is not getting enough fuel if the choke needs to be on check fuel tap or any in line filters

Jun 25, 2009 | kawasaki ZX-6R Ninja Motorcycles

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