July 29th, 2023, 08:03 AM | #1 |
ninjette.org newbie
Name: Cade
Location: Leesburg VA
Join Date: Jul 2023 Motorcycle(s): Ninja 250 Posts: 7
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Do i engine swap(01 Ninja 250)
I have an 01 ninja 250 that I've replaced the head gasket for and some smaller o rings, it has been giving me some trouble as I had it running for a few days before it died again. This is my first bike and I got it as a project to learn more about mechanics and internal combustion engines, so its multitude of problems isn't too frustrating.
However, I recently picked up two pregen engines for 50 bucks, one had a completely frozen piston ring on cylinder 1, but i was scrapping it for its rockers. The other, seems to be in decent shape, is missing some hoses and was pretty dirty, but has compression at ~180 psi on both cylinders. The one currently in frame has ~150 on Cyl 1 and ~125 on Cyl2 after dropping oil into the cylinders(i know i should replace the rings). However the engine in frame has some bolts that snapped in the cylinder head, this holds the 3 and 4 cam shaft guide/retainers all the way down and since they are both missing this screw, I notice a small gap and I am guessing it's causing a problem with the rockers not engaging the intakes. It's currently not starting on fuel, used to start with fluid now it will not. My only major concern with swapping the engine is I do not have the best facilities to support it. Any help into this problem would be appreciated, and apologies if the post seems a bit erratic, I can explain in better detail if needed. |
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July 29th, 2023, 10:02 AM | #2 |
ninjette.org certified postwhore
Name: AKA JacRyann
Location: Mesa, AZ
Join Date: Dec 2011 Motorcycle(s): CB125T CBR250R-MC19 CBR250RR-MC22 NSR350R-MC21 VF500F CBR600RR SFV650 VFR750F R1M ST1300PA Valkyrie-F6C Posts: A lot.
MOTY - 2018, MOTM - Nov '17
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Greetings & Salutations!! Let's see photos of your bike and tell is a little about you. Welcome to slavery known as "project bikes"!!!
1. do you have factory OEM service manual? 2. when you replaced headgasket, did you measure head and deck for flatness? 3. why didn't you placed snapped bolts #3 & 4? When working on bikes, it's best not to skip steps, even if you have to wait months for parts to ship from Japan. Every single nut & bolt on bike serves purpose. Not only are there no shortcuts, it can be serious safety issue that'll kill you!! Not just quick & easy either, but slow, painful crimpling death... Only thing you need for engine-swap is car-jack or ladder. I prefer ladder to hang and hold engine because it's more stable. Won't teeter-totter and fall off like on jack and frees your hands to line up mounting points and insert bolts. Imagine strap wrapping around and lifting engine rather than hanging bike. |
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July 29th, 2023, 11:33 AM | #3 | |
ninjette.org newbie
Name: Cade
Location: Leesburg VA
Join Date: Jul 2023 Motorcycle(s): Ninja 250 Posts: 7
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Quote:
I did check both sides for flatness and they were fine. I did not replace the bolts because they are snapped off recessed into the screw hole, if I want to use my screw extractor I would need to remove the engine anyways as the frame blocks my tools, and I would need to have a vacuum running to prevent metal shavings from getting elsewhere in the engine. I was planning on using a tire to support the engine when it drops and ratchet straps to the frame, If I do the ladder method would it be a similar process, just strapping the ratchets to the ladder, instead of the frame? |
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July 29th, 2023, 12:49 PM | #4 | |
ninjette.org certified postwhore
Name: AKA JacRyann
Location: Mesa, AZ
Join Date: Dec 2011 Motorcycle(s): CB125T CBR250R-MC19 CBR250RR-MC22 NSR350R-MC21 VF500F CBR600RR SFV650 VFR750F R1M ST1300PA Valkyrie-F6C Posts: A lot.
MOTY - 2018, MOTM - Nov '17
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Quote:
https://www.amazon.com/Grip-18095-2-..._df_B002QFVRQ8 If you have garage beams overhead, you can hang from there. Gives you more space to work on bike without ladder in way. |
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July 29th, 2023, 02:59 PM | #5 | |
ninjette.org newbie
Name: Cade
Location: Leesburg VA
Join Date: Jul 2023 Motorcycle(s): Ninja 250 Posts: 7
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Quote:
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July 29th, 2023, 10:38 PM | #6 |
ninjette.org certified postwhore
Name: AKA JacRyann
Location: Mesa, AZ
Join Date: Dec 2011 Motorcycle(s): CB125T CBR250R-MC19 CBR250RR-MC22 NSR350R-MC21 VF500F CBR600RR SFV650 VFR750F R1M ST1300PA Valkyrie-F6C Posts: A lot.
MOTY - 2018, MOTM - Nov '17
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Compression certainly looks good! Definitely measure valve-clearances and adjust if necessary. So, so much easier with engine out of frame.
Only takes about 1/2-day to swap engine. So really worth it to get bike running. |
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July 30th, 2023, 12:34 PM | #7 |
ninjette.org newbie
Name: Cade
Location: Leesburg VA
Join Date: Jul 2023 Motorcycle(s): Ninja 250 Posts: 7
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I adjusted both engines for valve clearance before testing compression, and I am going to do the swap. However, the front sprocket has an 8mm bolt that is completely rounded off. I have used extractor sockets and it has done nothing. I would prefer not to remove the rear tire to swap the engine and just remove the sprocket and remove the chain.
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July 30th, 2023, 01:09 PM | #8 | |
ninjette.org certified postwhore
Name: AKA JacRyann
Location: Mesa, AZ
Join Date: Dec 2011 Motorcycle(s): CB125T CBR250R-MC19 CBR250RR-MC22 NSR350R-MC21 VF500F CBR600RR SFV650 VFR750F R1M ST1300PA Valkyrie-F6C Posts: A lot.
MOTY - 2018, MOTM - Nov '17
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