New guy here with an 86 FZ600, issues! - Yamaha FZ6 Forums - FZ6 Motorcycle Forum
 
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post #1 of 7 (permalink) Old 08-27-2011, 09:24 PM Thread Starter
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New guy here with an 86 FZ600, issues!

Hi guys.

I just picked up an 86 FZ600 for dirt cheap with a title. It's in decent shape, the previous owner replaced the rotor, stator and associated parts. Someone put K&N individuals on it.

The bike has some problems obviously

I threw a jumper pack on it and it cranked over and started almost instantly I tried revving it and it just bogged and died. I restarted it instantly and it would idle at ~800-~1000RPM steadily. I tried opening the throttle 100% and I noticed I could only move it maybe an 1/8th of a turn before it was at full throttle. So I turned it back to where a normal bike should be (all the way closed) and it died and wouldn't refire until I twisted the throttle fully open again.

I'm guessing my problem is a combination of a bad/misadjusted cable and a set of unjetted carbs for the K&Ns.
How should I go about trouble shooting this?

Thanks! I'll post some pics tomorrow.
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post #2 of 7 (permalink) Old 08-28-2011, 09:24 PM
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jetting

proly pilots aren't correct, since it's low engine idling you seem to be having an issue with. Has a previous owner been inside the carbs ? I'd go in, to see what mains/pilots are in there, and take it from there. What exhaust/intake combo are you planning to use ? If you could find a set of FJ600 carbs , you'd be going in a better direction.Intake boot change required for that mod. I'm not a jetting expert by any means, but also check carb sync whilst you are tuning ... FZ600s, are great vintage racing bikes. Competes in V5 class in WERA... just sayin' There are a couple of those running in the mid west, and down south regions, if you check with those guys on the WERA BBS, you would get some good tuning info from them.

http://forums.13x.com/forumdisplay.php?forumid=12
ask for "kenessex", I think he even has parts,or a FZ600 trackbike for sale ... there are others, as well ... let us know how you make out.
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post #3 of 7 (permalink) Old 08-28-2011, 11:38 PM Thread Starter
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Originally Posted by compmoto View Post
proly pilots aren't correct, since it's low engine idling you seem to be having an issue with. Has a previous owner been inside the carbs ? I'd go in, to see what mains/pilots are in there, and take it from there. What exhaust/intake combo are you planning to use ? If you could find a set of FJ600 carbs , you'd be going in a better direction.Intake boot change required for that mod. I'm not a jetting expert by any means, but also check carb sync whilst you are tuning ... FZ600s, are great vintage racing bikes. Competes in V5 class in WERA... just sayin' There are a couple of those running in the mid west, and down south regions, if you check with those guys on the WERA BBS, you would get some good tuning info from them.

http://forums.13x.com/forumdisplay.php?forumid=12
ask for "kenessex", I think he even has parts,or a FZ600 trackbike for sale ... there are others, as well ... let us know how you make out.
Thank you! Do you know where I can get the hardware to hold the side fairings on?
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post #4 of 7 (permalink) Old 08-31-2011, 01:35 AM
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fabbing , is your best bet ! Ahh, the "joys" of vintage bikes ! Usually, your only option. Just be efficient with material use, in size, and more importantly , *weight*, it's your enemy. less weight , = hp ! just get the job done. Find some aluminum banding, use your battery drill, and cut-off wheel, you'll be "in, like Flynn"... trial, and error is the method ! Remember , wear your safety glasses, and gloves ...have at it ! I looked @ FactoryPro jetting , to see if they offered any kits for this engine, but they don't ... I did not , look @DynoJet. If no one, has them , you will have to "customize" that as well. Ask, on the WERA site, you'll get plenty of helpful advice, I assure you ! Keep us informed, I will also be updating on the progress of my streetbike FZ600 build. And also the trackbike build my mechanic is involved with ... He has said he would go racing with it, but as usual, he's kinda busy staying alive in these tight times... He works for me, and another independant motorcycle shop, that specializes in Goldwings, and metrics ...
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post #5 of 7 (permalink) Old 08-31-2011, 01:46 AM
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also , check w Spec II in Cali , they used to sell lower fairing kits for EX500s, RZ350s,FJ600s, VFR700/750s, etc. He's a reputable buisiness, and may have something you could modify for this application ... maybe Maier plastics, also ...
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post #6 of 7 (permalink) Old 09-01-2011, 05:35 AM Thread Starter
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Originally Posted by compmoto View Post
fabbing , is your best bet ! Ahh, the "joys" of vintage bikes ! Usually, your only option. Just be efficient with material use, in size, and more importantly , *weight*, it's your enemy. less weight , = hp ! just get the job done. Find some aluminum banding, use your battery drill, and cut-off wheel, you'll be "in, like Flynn"... trial, and error is the method ! Remember , wear your safety glasses, and gloves ...have at it ! I looked @ FactoryPro jetting , to see if they offered any kits for this engine, but they don't ... I did not , look @DynoJet. If no one, has them , you will have to "customize" that as well. Ask, on the WERA site, you'll get plenty of helpful advice, I assure you ! Keep us informed, I will also be updating on the progress of my streetbike FZ600 build. And also the trackbike build my mechanic is involved with ... He has said he would go racing with it, but as usual, he's kinda busy staying alive in these tight times... He works for me, and another independant motorcycle shop, that specializes in Goldwings, and metrics ...
Hm you have 2 of these eh? Can you take some detailed pics of them and send them to me? I'd like to take an inventory if you will of what this is missing.

Here it is, can you name the exhaust? I have no idea.

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post #7 of 7 (permalink) Old 09-06-2011, 07:38 PM
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exhaust by Cobra

Cobra brand , at least the muffler...I'll try to snap some pics of mine soon...
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