November 17th, 2013, 09:52 AM | #1 |
ninjette.org member
Name: Alex
Location: Woburnn Ma
Join Date: Aug 2012 Motorcycle(s): 2000 Ninja 250 Posts: 71
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New-gen engine in Pre-gen frame. Oil leak under exhaust ports.
Hey guys
I needed a new engine for my Pregen Ninja an all i could find localy was a new-gen engine. after a lil reasearch i found out it was mostly straight forward match. Took a bit of work to get it in their but it all worked out fine. I went to take it for a test ride yesterday an when i got back from a 7 mile round trip i noticed their was oil on the front of the engine. I then ran the bike in my garage an noticed a little bit of oil bubling out this pin sized hole under the exhaust ports on the head. I looke don the pre-gen an their no suchj hole so im a bit at a loss. Can i just thread it an throw a bolt in there? is it drainning excess oil? any reason why only one of the two holes does this? TIA |
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November 17th, 2013, 08:15 PM | #3 |
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Nice. Would you be able to share some of the things you've had to do to make it work?
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November 17th, 2013, 08:58 PM | #4 | |
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Name: Brad
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Quote:
I'll get a photo. |
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November 17th, 2013, 09:02 PM | #5 |
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Name: Brad
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There is 1 of these for each spark plug. You can replace them without having to remove valve cover, just unbolt it and pop it up a little, no need to pull everything apart. Get a Magnet on stick (there metal on inside).
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November 17th, 2013, 09:30 PM | #6 | |||
ninjette.org member
Name: Alex
Location: Woburnn Ma
Join Date: Aug 2012 Motorcycle(s): 2000 Ninja 250 Posts: 71
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Quote:
. Electrical connectors were all the same, pregen carb with 1mm shims works quite well (not perfect), coilpacks and wires worked aswell. Prob more im forgetting. One thing i havent figured out yet is the newgen has a breather hole on the top on the valve cover an makes quite a bit of noise. I put a small cone filte ron it for now. Quote:
Quote:
The coolant lines hooked up easily aswell HOWEVER i had to remove the newgen upper hose connector on the top of the head since it has a 30degree bend compared to pregen thats straight. Thats when i had to unbolt the valve cover and must have shifted the gasket! |
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November 18th, 2013, 04:30 PM | #7 |
wat
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yeah as said above the spark plug gasket is leaking oil from under the valve cover into the spark plug wells. take the valve cover off , fix the screwed up gasket (probably replace as when you do that it bends the little metal part in the middle and it just doesn't work quite right after) and put it back.
MAKE SURE YOU DONT DROP THE LITTLE RUBBER THING DOWN THE WATER OUTLET HOLE!!!
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June 5th, 2016, 11:35 AM | #8 |
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Name: John
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Sorry to bring this thread back from the dead (and slightly OT at that), but the photos in the original post are the closest thing I could find to an answer to my question... which is..
What is that tube/hose on the front of the engine? (Below the red circles in the first photo) I seem to have some oil weeping from the fitting on the right end of the hose. I figured I can replace that hose, but having trouble figuring out how it's identified. My guess is this: 51044-0050 Tube-Assy, Crankcase-Head http://www.kawasakipartshouse.com/oe...75b9/crankcase Is that correct? Thanks! |
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June 5th, 2016, 12:03 PM | #9 |
EX500 full of EX250 parts
Name: Bill
Location: Grand Rapids-ish, MI
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You have a typo in your part number, but yes, that's the tube in the first pic.
That one's not too bad, but Kawasaki's diagrams are higher resolution than a lot of the parts places' and they're usually clickable too. https://www.kawasaki.com/Parts/Parts.../2009/EX250J9F
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June 5th, 2016, 12:11 PM | #10 | |
ninjette.org newbie
Name: John
Location: Bay Area, CA
Join Date: May 2015 Motorcycle(s): 2009 Ninja 250r Posts: 6
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Quote:
I didn't seem to find where anyone had detailed replacing this hose - should I simply assume it's as straightforward as it looks, or is there anything I should be aware of when swapping it out? |
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June 5th, 2016, 12:36 PM | #11 | |
Vintage Screwball
Name: B
Location: Washington
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Quote:
Replace those and torque to manufacturers spec. Should be 4 washers.
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June 5th, 2016, 02:03 PM | #12 | |
Daily Ninjette rider
Name: Hernan
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Quote:
You may not need to replace the hose, just new washers and proper torque. Picture is not of your engine, but it gives you the idea (part 15 without 14):
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