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Yamaha vs Suzuki

Old 03-15-2019, 07:19 AM
  #21  
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Originally Posted by r_ventura_23 View Post
Zuks are so much better.
And so much cheaper. And so much (fill in the blank here).
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Old 03-15-2019, 07:23 AM
  #22  
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Originally Posted by smellslikegrouper View Post

not a chance they are 4.2s in a twin application. Have to be inline four 2.8s or v6 3.3l
I stand corrected.. they are inline 4s.
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Old 03-15-2019, 07:41 AM
  #23  
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Originally Posted by Brian6892 View Post
I stand corrected.. they are inline 4s.
You are a good man.
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Old 03-15-2019, 07:46 AM
  #24  
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Simon Motor Sports say they can flash these f200 inline 4s to 225HP
If I am WOT around 52-53mph. Realistically what kind of increase would I see with a 25hp increase on each engine??
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Old 03-15-2019, 07:46 AM
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I would think it would be hard to trade up from i4 to a v6 and break even
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Old 03-15-2019, 05:52 PM
  #26  
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Originally Posted by friogatto View Post
They have been doing it for years.

Just goes to show how much Yamaha limited the VF200, 225, and 250.

By taking the fuel mappings from the F300 and bumping the rev limiter they were able to squeeze 334hp out of the VF200 (they share the same 4.2L).

I would keep the stock limiter so its more in the 300hp range.

OP, even if you dont have the 4.2L, Hydro may have other solutions to help get the numbers you need. Worth a call to find out.
FYI I believe their dyno data shows max hp being achieved at 5500 RPM. I plan to keep the stock rev limit in place and compare performance.
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Old 03-25-2019, 02:08 PM
  #27  
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250 SHO converted to 300

More than one shop is flashing these motors.
In the above thread he was making 350 at 6600rpm and continued to increase through 7000rpm to 354.
I believe these numbers are at the block.

You can see on the graph HP gain slows from 5000 through 6000, then HP climbs again from 6000 to 7000rpm.

But none of this matters as were talking about 2 different motors.

OP, I agree, keep your stock limiter, see what they can do and if it will get you what you need.
I wouldnt expect more than 1-2mph increase with only 50 addition total HP. Once you get into those upper numbers 1-2mph gets harder and harder to reach.
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