Brown flakes in tank, been sitting, kfx400 - Suzuki Z400 Forum : Z400 Forums
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post #1 of 8 (permalink) Old 05-01-2019, 04:45 PM Thread Starter
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Brown flakes in tank, been sitting, kfx400

Kfx 400 has been sitting in shed for a while, noticed today there's like brown flakes in the bottom the empty tank. It's plastic so figure it can't be rust, is it like dried sludge? Is it a big deal since there's a filter in the tank? Or am i gonna have to remove the whole thing?
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post #2 of 8 (permalink) Old 05-01-2019, 06:43 PM
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Take the tank off and rinse it with fresh gas a couple times. They probably came from a dirty gas can and got into the tank. You can also remove the petcok and clean the filter itself.

'05 Z
94mm bbk, +4 stroker, Hot Cams, Vertex piston, FMF Power Bomb header and Power Core can, KW black diamond valves/dual springs, FCR39, K&N, Elka long-travel LT fronts and rear, Houser +3, +3/4 LT A-arms, American Star pro xs chromoly tie rods, Dyna non-programable, Tusk +3 axle.
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post #3 of 8 (permalink) Old 06-09-2019, 01:32 PM Thread Starter
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Originally Posted by jetmech25 View Post
Take the tank off and rinse it with fresh gas a couple times. They probably came from a dirty gas can and got into the tank. You can also remove the petcok and clean the filter itself.
Tried removing the petcock and the cheap brown filter broke. Are both those filters? The metal ones all covered in green from old gas I guess.. the paper brown one is shorter which broke. Are they easy to replace? Or can I just put an inline filter instead of spending $100?Everytime I fix something another thing breaks..

Last edited by tampafan; 06-09-2019 at 02:13 PM.
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post #4 of 8 (permalink) Old 06-09-2019, 04:22 PM Thread Starter
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Well the petcock is trash.. Got it out but broke the main filter too lol. Guess now I have a reason to switch to a raptor pet. For that I just hook up as usual and put a rubber nip over the vacuum inlet on the carb? I read the size is 3/16 is that correct? Seems the fuel line is gonna be a pain to get off the old petcock tho. Is the stock line the same size/fit as the raptor?

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post #5 of 8 (permalink) Old 06-09-2019, 05:29 PM Thread Starter
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OK so one of these should Fit, right https://www.ebay.com/itm/8-assort-DO.../333168526022?

And is the petcock in the pic attached right, it's 2004
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Last edited by tampafan; 06-09-2019 at 05:37 PM.
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post #6 of 8 (permalink) Old 06-09-2019, 10:21 PM
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Yeah, just scrap the entire petcok. The new Raptor petcok comes with those filters as part of the unit. Make sure itís a Yamaha part and not some cheap Chinese knockoff or youíll have problems. It hooks right up, same sizes, and plug the vacuum port. I imagine your carb is a mess, too.
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'05 Z
94mm bbk, +4 stroker, Hot Cams, Vertex piston, FMF Power Bomb header and Power Core can, KW black diamond valves/dual springs, FCR39, K&N, Elka long-travel LT fronts and rear, Houser +3, +3/4 LT A-arms, American Star pro xs chromoly tie rods, Dyna non-programable, Tusk +3 axle.
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post #7 of 8 (permalink) Old 06-12-2019, 01:43 PM Thread Starter
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Ya I ordered one from rockymountain, not taking chances to save a few $$.. And on the vaccum cap do you know the size? Think I read someone used 3/16 somewhere but not sure
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post #8 of 8 (permalink) Old 06-12-2019, 02:54 PM
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Sounds right. If not, a small piece of hose with a random bolt in it and a zip tie to hold it in place works.

'05 Z
94mm bbk, +4 stroker, Hot Cams, Vertex piston, FMF Power Bomb header and Power Core can, KW black diamond valves/dual springs, FCR39, K&N, Elka long-travel LT fronts and rear, Houser +3, +3/4 LT A-arms, American Star pro xs chromoly tie rods, Dyna non-programable, Tusk +3 axle.
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