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September 3rd, 2013, 08:32 PM
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#1 |
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ninjette.org sage
Name: Brad
Location: Sydney
Join Date: Mar 2012 Motorcycle(s): Ninja 250r 2010 SE Posts: 573
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36 hp 250 with a dodgy tune
Thought I would post a thread for anyone who's wondering how things are going.
They say a picture is worth a thousands words. Need I say anymore. Yes catastrophe was avoided. Damage was 80 bucks.... I had spare valves.  I have CR carbs and aftermarket camshafts going in next week for another dyno run in 2 weeks. I will post results of the run. Carbs are not tuned because CR's are going on next week. The stock carbs are sh**. This dyno run is with Stock carbs, stock cams and stock ignition timing. Compression has been fixed. 190 p.s.i on both cylinders. 
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September 3rd, 2013, 08:57 PM
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#2 |
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ninjette.org certified postwhore
Name: Jason
Location: Norfolk, VA
Join Date: Dec 2011 Motorcycle(s): 2012 EX250, 2014 EX300 Posts: A lot.
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Glad you got working.
Will you break 40 with a tune?
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Ethioknight Memorial Fund- Sticker sale http://www.ninjette.org/forums/showthread.php?t=111700 |
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September 3rd, 2013, 08:58 PM
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#3 |
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ninjette.org guru
Name: Kevin
Location: Madison
Join Date: Apr 2013 Motorcycle(s): 2004 Ninja 250 Posts: 465
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I'm hoping you will hit 40!
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September 4th, 2013, 12:48 AM
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#4 |
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ninjette.org guru
Name: scott
Location: australia
Join Date: Jan 2012 Motorcycle(s): 2012 ninja 250r se Posts: 435
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curve looks nice and strong
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September 4th, 2013, 03:41 AM
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#5 |
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ninjette.org certified postwhore
Name: Eric
Location: Iowa City
Join Date: May 2009 Motorcycle(s): 2008 Kawmeracchi 350 2010 Project X Posts: A lot.
Blog Entries: 54
MOTM - Sep '18, Feb '16
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That's good power. You will love the CR carbs.
How did the valve bend?
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Top speed 123.369mph. Ohio mile Worlds fastest 250 ninja |
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September 4th, 2013, 03:47 AM
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#6 |
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Board Member
Name: ...
Location: WI
Join Date: Dec 2011 Motorcycle(s): 250R (street), 250R (dirt) Posts: A lot.
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Hey...
Do you have a root cause? I am tearing mine apart this winter to diagnose the compression issue. I will be checking the valves as well. I expect that I can make 40 hp when I know everything is tight. I just wanted to ride after 8 months of work. |
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September 5th, 2013, 04:05 AM
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#7 |
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Board Member
Name: ...
Location: WI
Join Date: Dec 2011 Motorcycle(s): 250R (street), 250R (dirt) Posts: A lot.
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If you do get the CR carbs, please let me know if it helps the power/tune. Mine idles like ^%#*% and the high RPM/low throttle movements are horrible. For those who would like to solve this....I have tried and the tuner has spent SOME time on it as well with the same results.
Besides, I posted a thread about the "ultimate" tune, for that I need to get them right?  I won't get them till over the winter if I do, but @Racer x I will have lots of questions  Otherwise, @tubarney it may be a good idea to merge this with the thread you and I were oringinally working with. Less clutter and resolution, or at least some data until the next update. |
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September 6th, 2013, 07:54 AM
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#8 | ||
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ninjette.org sage
Name: Brad
Location: Sydney
Join Date: Mar 2012 Motorcycle(s): Ninja 250r 2010 SE Posts: 573
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Quote:
The carbs, beet cams and brt are going on next week. I will have carbs in a couple of days now. Ordered them 30th August and there in stock at Keihin Japan. Quote:
 , I cranked it around with a wrench prior to starting, pistons and valves hit. I fixed the timing and started it. It idled for 30 secs fine then starting ticking. I killed it and pulled it apart to find a valve seal where the shim should be, a chipped shim on top of the spring, 4 bent intake valves, 1 valve being held in by 1 collet!!!!!!!!!!. I was extremely lucky. A few more secs and it was game over.
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1 out of 1 members found this post helpful. |
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September 7th, 2013, 11:49 AM
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#9 |
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The 2 Stroke Ninja!!
Name: Nick
Location: Sussex, NJ
Join Date: Feb 2012 Motorcycle(s): 2010 250R, 1977 RD400, 72&73 RD350 75 RD200 Posts: 79
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What was the outcome of your piston and cylinder issue?
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