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Old April 6th, 2013, 11:52 AM   #1
reignman
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ninja 500 engine in a 250 frame

Does any one know if the ninja 500 will fit in the 250 frame with minimal modifications?
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Old April 6th, 2013, 12:22 PM   #2
pomartin
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minimal is very relative thing... if you spend most of the free time (when not on bike) in a garage and have propper tools, then it is easy.
If you are not experienced in such things, then dont do it yet.
On other hand... that would be stupid thing to do. Why? Think about it
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Old April 6th, 2013, 12:25 PM   #3
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Some ninja 500 / 250 swap threads:

The Ex 500 Engine swap with pics

Custom 09 ninja 250 with ex 500 or 650r engine + others

Unless someone has a free 250 and free 500 already in their garage, and unlimited free time, I don't see the point of the exercise. A new Honda 500 is $5K, as is a Ninja 300, both of which would outperform the frankenbike.
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Old April 6th, 2013, 06:15 PM   #4
reignman
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by minimal i meant just being able to modify the engine mounts and bolt it up. i'm capable of doing more but it ist really worth. i just thought of this as a solution to the worst case scenario that i have to replace the engine in my sisters 250. one cylinder had a broken rocker arm and has no compression. if i tear into it and its not worth fixing i thought of just replacing it with a 500 instead. which the more i think about it the more i realize it will likely involve purchasing other parts too like new carbs and new headers
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Old May 16th, 2018, 02:26 PM   #5
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already done this mod to my 2010 250r ive used the gpz500s motor been riding it for about 5 years i go touring all over europe on it every year it will beat any bike round the mountains watch the vid! https://www.youtube.com/watch?v=Ga84oLNg1WU (dont take to much notice of the rev counter its not accurate) and please dont leave comments on youtube about it being a 500 as the guys i go touring with still think its a 250!
upgrades running 140 rear tyre and brembo front brake conversion.
just in the middle of fitting a 4.5 650r rear wheel with a 160 tyre.
and will be fitting the 650r motor over the winter.
and all the claims that the 500r motor will twist buckle the frame are rubbish!
i highly recommend this upgrade you wont regret it!!!
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Old May 16th, 2018, 04:06 PM   #6
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MOTM - Nov '17
Probably best bang-for-buck speed upgrade.

3.0-sec faster 1/4-mile than new-gen 250
2.0-2.5s faster 1/4-mike than Ninja 300
1.5-2.0s faster 1/4-mile than CBR500R
1.0-1.5s faster 1/4-mike than Ninja 400

Along with shorter wheelbase than all of them makes for quite fun flickable bike!
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Old May 16th, 2018, 05:03 PM   #7
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Quote:
Originally Posted by beau-selector View Post
already done this mod to my 2010 250r ive used the gpz500s motor been riding it for about 5 years i go touring all over europe on it every year it will beat any bike round the mountains watch the vid! https://www.youtube.com/watch?v=Ga84oLNg1WU (dont take to much notice of the rev counter its not accurate) and please dont leave comments on youtube about it being a 500 as the guys i go touring with still think its a 250!
upgrades running 140 rear tyre and brembo front brake conversion.
just in the middle of fitting a 4.5 650r rear wheel with a 160 tyre.
and will be fitting the 650r motor over the winter.
and all the claims that the 500r motor will twist buckle the frame are rubbish!
i highly recommend this upgrade you wont regret it!!!
Nice work, do you have a build thread, or pics.

That is definitely something special
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Old May 17th, 2018, 01:17 AM   #8
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Nice work, do you have a build thread, or pics.

That is definitely something special
thanks
i lost all the photos of the build but next time i got the fairings off are take some more photos and post them on here.
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Old May 17th, 2018, 08:44 AM   #9
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Here's one you posted in other thread. Did bodywork fit around engine without modifications?

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Old May 17th, 2018, 09:04 AM   #10
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Here's one you posted in other thread. Did bodywork fit around engine without modifications?

yes thats one of the photos i lost.
no the fairings dont meet at the bottom i made a small alloy plate to connect.
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Old May 17th, 2018, 09:20 AM   #11
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https://www.ninjette.org/forums/atta...1&d=1526573954
Attached Images
File Type: jpg ninja500 001.jpg (153.3 KB, 14 views)
File Type: jpg ninja500 002.jpg (152.2 KB, 8 views)
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Old May 17th, 2018, 11:49 PM   #12
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Originally Posted by beau-selector View Post
yes thats one of the photos i lost.
no the fairings dont meet at the bottom i made a small alloy plate to connect.
Wicked, definitely a sleeper

I'm sure you surprise the hell out of some people
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Old May 18th, 2018, 02:44 AM   #13
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Wicked, definitely a sleeper

I'm sure you surprise the hell out of some people
yes i go with 10 other guys touring europe and ive never let on its a 500 they still think its a tuned 250! they all ride 1000cc or bigger most of them cant even get near me on the mountains the only place i lose out is motorways.
650 motor should be fitted by next years ride not sure how im going to explain the extra bhp? maybe say i fitted the 300r motor?
will tell them all one day but not yet!!!
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Old May 18th, 2018, 02:51 AM   #14
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ninja500 006.jpg
4.5" with 160 tyre fitted
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Old May 18th, 2018, 04:14 AM   #15
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nice. i use to have a ninja 500. (should have kept it)
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Old July 22nd, 2018, 06:31 PM   #16
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Quote:
Originally Posted by beau-selector View Post

4.5" with 160 tyre fitted
Is that ER-6F rear-wheel?
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Old July 22nd, 2018, 07:22 PM   #17
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Quote:
Originally Posted by beau-selector View Post
already done this mod to my 2010 250r ive used the gpz500s motor been riding it for about 5 years i go touring all over europe on it every year it will beat any bike round the mountains watch the vid! https://www.youtube.com/watch?v=Ga84oLNg1WU (dont take to much notice of the rev counter its not accurate)...
Why isn't tach accurate? Are you using EX500 ignition-box? With EX250 gauge?
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Old July 23rd, 2018, 03:21 PM   #18
beau-selector
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Why isn't tach accurate? Are you using EX500 ignition-box? With EX250 gauge?
correct! yes wanted to keep the original 250 dash so wired the 500 loom into it wasnt sure how to get around the problem so i just live with it.
i expect to have similar problems when i fit the 650r motor.
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