Posted February 23, 201411 yr Hey everyone. Still fairly new to these forums, but I think I found the place to post issues(please correct me if I'm wrong). So , Friday, I fired up the 87 fz600, it fired up and ran fine for about 30 seconds and then fuel started pouring out my airbix and out of the number 2 cylinder at the gasket between the jugs and the crankcase. Any thoughts as to why it would flood out so bad? Or how the fuel made it out that jug seal? There was no fuel in the oil, no oil in the fuel, and when I tore it down, I didn't see anything that looked obviously wrong. New gaskets on they way..... Sent from my C5155 using Tapatalk
February 23, 201411 yr Author Is it a bad gasket causing the fuel to come from the lower part of the jugs? I misread your post at first, I thought you were telling me to take my bike to a workshop lol... Sent from my C5155 using Tapatalk
February 23, 201411 yr The carbs need stripping, floats are holed ,or needle valves renewed or cleaned , replace all 4 gaskets while carbs off, .they come as a set, And your in the workshop,,,,
February 23, 201411 yr Author I thought i had found a post where the k&n stage 3 jet kits were 35$. Since my stock airbox is busted would it be better to put pods on and that jet kit in since I'll have them apart anyway? I can't find that post though...yes it is an aftermarket vacuum operated petcock, I order the rebuild kit for the factory one though... Sent from my C5155 using Tapatalk
February 23, 201411 yr From all the research I've done (I've never tried it) the K&N filter pods caused more problems than they're worth. Don't try and pump more HP out of this bike, just enjoy it for what it is... once you get it running right you'll be more than happy with the results, trust me. This bike has plenty of power! I'd just strip your carbs and clean them really good as suggested, you probably need new float needle valves, that's what shuts the fuel off when the float gets high enough, unless your floats are seriously messed up, but you won't know until you crack open the carbs... Strip the carbs, post pics if you need, and go from there! PS, if you're using carb cleaner, use it in a WELL VENTILATED space!
February 23, 201411 yr Moderator On 2/23/2014 at 6:53 PM, blackhat250 said: The carbs need stripping, floats are holed ,or needle valves renewed or cleaned , replace all 4 gaskets while carbs off, .they come as a set, And your in the workshop,,,, that's because I moved it
February 23, 201411 yr Author Honestly, I'm not one of the how-much-power-can-i-get-out-of-it guys, I was only thinking the pod and jet kit route to save some money since an unbroken airbox is a bit more spendy Sent from my C5155 using Tapatalk
February 23, 201411 yr How broken is it? You can probably melt it back together with a soldering iron.
February 23, 201411 yr yes it is an aftermarket vacuum operated petcock, double check to make sure that the vac and fuel pipes are connected up correctly
February 23, 201411 yr Author Its missing the entire lower back.... I can easily see the filter Sent from my C5155 using Tapatalk
February 23, 201411 yr Moderator might have been modded to get more air in. might be that's its fine to use with the existing air filter
February 23, 201411 yr Author So if it ran fine like that, I'm failing to see how the pods would be bad, if I put a sleeve on them I would feel safer and they would be easier to get ony carbs than the 26 year old rubbers of the airbox....thoughts? Sent from my C5155 using Tapatalk
February 24, 201411 yr Hey I'm not saying it won't work, just saying from what I've read everyone who installed the pods had problems, you could still try it out, maybe it'll work if you get the correct jet kit!
February 24, 201411 yr Author Yeah I understand the concern....do you have an extra box? Sent from my C5155 using Tapatalk
February 24, 201411 yr Moderator pods affect the diaphram of the carbs, whereas the inlet tract from the airbox is tuned to give the correct flow.
February 24, 201411 yr Author So a pod with a wrap would get it closer to stock but the unmodified airbox is still superior for full range air intake, correct? Sent from my C5155 using Tapatalk
February 24, 201411 yr Author Ok, so here's a list of everything I've ordered : complete gasket set, petcocke rebuild, carb gaskets and float valves, factory airbox, two coils with plug wires, I've already rebuilt the front forks, new grips and windscreen bolts....all I feel like this baby needs is the two Yamaha engine covers and the lower and middle fairings.....anything else I'm missing? Lol Sent from my C5155 using Tapatalk
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