August 13th, 2013, 10:18 PM | #1 |
Private Joker
Name: Ben
Location: Towson, MD
Join Date: Nov 2012 Motorcycle(s): '99/'01 Ninja 250 "sketchy", '13 Ninja 300 "yoshi", '03 GSXR 600 "merlin" Posts: A lot.
MOTM - Mar '14
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Full Rebuild
Ok, so a few months ago the engine blew on my little yoshi. basically what happened was I was redlining it in 6th for 10miles straight down the highway home from work every night and it just gave in. Since then I have bought a Ninja 300 but there is just something about the 250 that is special to me and I just want to rebuild it from the ground up (I had lowsided it multiple times)
currently I have the engine outside of the frame. The only problem. I have no clue wtf I'm doing. what I know: -the connecting rod is broken -one of the pistons is not firing and is cracked what I am presuming I need to do: -get my hands on a shop manual -purchase a new connecting rod and piston from somewhere worst case scenario that I want to avoid is spending $500 on a new engine, I would much rather use that money on the rest of the rebuild any advice is very welcome as I proceed I will post pictures of progress and ask more specific questions as necessary. |
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August 13th, 2013, 10:56 PM | #2 |
Certifiable nontundrum
Name: Harper
Location: NC Milkshake stand
Join Date: Mar 2013 Motorcycle(s): 2013 SE NINJA 300 Posts: Too much.
MOTM - Sep '13, Sep '16
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If you can source all the internals for a decent price and know some folks with a machine shop you can get it done! If you wanna complete rebuild, which in the end you will. Your engine is only as strong as its weakest link, you leave all those old parts in an throw a few new parts at it won't be long till ya have to redo the engine again. Usually the problem that crapped out the one or two parts was doing the same thing to the rest of the parts, it just stopped before it killed them all.
If I care about a vehicle I'm working on I never replace one vital part of an assembly, always do it as a whole! If the person wants to save money, I give them that speech and either do what they said or tell them I'm not the right person for the job. I don't like folks coming back talking about my work when it's their decisions that affected the outcome. I have been known to be meticulous rarely if ever do folks complain about my work. Always get the manual or search a ton online before getting to deep into mechanical works... That funny lil spring you didn't see jump out an roll across the floor could be important... Ask me how I know
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August 14th, 2013, 07:43 AM | #3 | |
RIP Alex
Name: Cuong
Location: Houston, TX
Join Date: Apr 2011 Motorcycle(s): '10 250r, '09 265r Posts: A lot.
Blog Entries: 2
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Quote:
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August 14th, 2013, 11:57 AM | #4 |
ninjette.org certified postwhore
Name: Justin
Location: Florida
Join Date: Aug 2012 Motorcycle(s): Ninja 250 2001 Posts: A lot.
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A used motor will likely match or be less than the costs of material involved in this rebuild. When you include labor and learning time you'll definitely be saving. It's up to you if you want to learn how to rebuild it or not and if it's worth your time and money. See my thread on rebuilding maybe that will give you an idea.
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Mods: Offset clutch pressure plate |
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August 14th, 2013, 12:39 PM | #5 |
MSF Coach!
Name: Lupe
Location: Antioch, Tennessee
Join Date: Jun 2012 Motorcycle(s): 2003 ninja 250 Posts: 886
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i got a used pregen motor for 300 and then sold my old one (that had shattered rocker arms) for 200. just put it on craigs list and the add said, blown ninja 250 motor for sale, has shattered rocker arms. replaced the motor with a new one selling $250 obo. had it sold in 2 weeks to a guy from kentucky that drove down.
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