650cc engine update thread... - Kawasaki Versys Forum
 
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post #1 of 17 (permalink) Old 05-19-2010, 09:55 PM Thread Starter
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650cc engine update thread...

This thread is only meant to update. i am not looking for feedback or replies. I will just tell you what i am doing during my build. thank you. this will also be a thread where i will post results from the dyno. everybody have a nice day.

FIRST POST!!!!!

i got my 2nd motor last sunday. today took the covers off and started to spec out the different areas of the motor. tomarrow i will be measuring the cams and , claying the chamber, checking the cc's of the head and determind the factory squish.
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post #2 of 17 (permalink) Old 05-20-2010, 04:57 AM
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Here we go again...
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post #3 of 17 (permalink) Old 05-20-2010, 04:25 PM
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Let's give him a chance fellas.......



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post #4 of 17 (permalink) Old 05-20-2010, 08:33 PM
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Sweet I Cant;t wait!
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post #5 of 17 (permalink) Old 05-20-2010, 10:18 PM
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Let's give him a chance fellas.......
I agree...btw Bear get your popcorn smiley ready!

"When It Rains, Get Wet"
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post #6 of 17 (permalink) Old 05-21-2010, 03:41 AM
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I was thinking the same.Give him a chance, itīs a much better approach than the first time...and punctuated too.
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post #7 of 17 (permalink) Old 05-21-2010, 11:29 AM Thread Starter
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ok. sencond post. we found that the intake and exhaust runners are highly restricted. almost like kawasaki wanted to make the bike slower on purpose. we also made a nice clutch shim package, that works great. my bike wouldn't lock right away when shifting at 10,500 at full throttle. ummm what else... o yeah i need a set of throttle bodies, they dont have to work right just need them for the flowbench. so far everything is looking very promising. we are still spec'n out the motor so we can properly use the desktop dyno. i give some flow numbers next post.
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post #8 of 17 (permalink) Old 05-21-2010, 01:15 PM
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Question

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we found that the intake and exhaust runners are highly restricted.
What method(s) did you use to make this determination?
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post #9 of 17 (permalink) Old 05-21-2010, 04:04 PM Thread Starter
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What method(s) did you use to make this determination?
just as an observation of size(small) and shape (squished oval). they also have a fin that goes all the way down the runneron the botoom, up to the splitter wall. I cant be for sure until i put it on the flowbench this comming week. we will find out where the bottle neck effect is (if there is one)(throttlebodies, intake runners or valve size.) this is all i have for today.
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post #10 of 17 (permalink) Old 05-21-2010, 05:20 PM
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Thumbs up

Thanks.

Interesting... so there is a small fin up to the divider.

Usually, that type of thing is used to correct a (low) velocity condition often caused by too much turbulence out of the induction device (TB, carb). Definitely want to be careful with that when porting.

If you can take a pic, I may be able to make a better determination.
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post #11 of 17 (permalink) Old 05-25-2010, 11:23 AM Thread Starter
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just noticed yesterday that the 650 motor does not fire 180 degrees apart. thats kinda kool and would explain why people say my bike sounds a little like a helicopter at idle. should be popping the head off today. can't wait to get it to the machine shop to get flow numbers.
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post #12 of 17 (permalink) Old 06-15-2010, 10:30 PM Thread Starter
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ok sorry it has been so long between posts. but due to the nature of our country I (living close to Mexico) decided to go buy an ar-15 for self-defence. anyways i havent got any further on the engine kit, but i have got a second job now so i will have money for it real soon. ON A GOOD NOTE!!!! we did a wheel conversion. we have made spacers and adapted a zx6 wheel to fit our bikes. this means we can run a wider tire (180) and have a larger contact patch. also we found that the 2005-06 ninja 636 rims are lighter then the wheels we have. let me know if anyone is interested at [email protected]. I should know more on the enigine on my next paycheck in 2 weeks. thanks for listening and have a good day.
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post #13 of 17 (permalink) Old 06-16-2010, 12:34 AM
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Wish you all the best and please put some pictures so we know what your referening too. Not all of us are Rocket Scientics

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post #14 of 17 (permalink) Old 06-16-2010, 09:07 AM
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Originally Posted by skizzo81 View Post
ok. sencond post. we found that the intake and exhaust runners are highly restricted. almost like kawasaki wanted to make the bike slower on purpose. we also made a nice clutch shim package, that works great. my bike wouldn't lock right away when shifting at 10,500 at full throttle. ummm what else... o yeah i need a set of throttle bodies, they dont have to work right just need them for the flowbench. so far everything is looking very promising. we are still spec'n out the motor so we can properly use the desktop dyno. i give some flow numbers next post.
Could the intake and exhaust runners that are restricted be the area of the engine Kawasaki detuned for better low end and mid range response?
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post #15 of 17 (permalink) Old 06-16-2010, 02:05 PM
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On the intake, narrow runners increase the velocity at which fresh air fills the cylinder. The downside is it becomes restrictive at high RPM. In other words, this boosts low RPM torque.
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post #16 of 17 (permalink) Old 06-16-2010, 04:49 PM Thread Starter
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Could the intake and exhaust runners that are restricted be the area of the engine Kawasaki detuned for better low end and mid range response?
we believe that the smaller runners are for the higher tourqe. but they didnt put a lot of time into the machining and thats where we think they detuned it. we will sharpen everything and put in larger intake valves. but like i said need to wait 2 weeks for a check.
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post #17 of 17 (permalink) Old 06-16-2010, 04:50 PM Thread Starter
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Wish you all the best and please put some pictures so we know what your referening too. Not all of us are Rocket Scientics

ok can do... O are you referring to the larger wheel mod??????
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