2014 map for break in?


7 replies to this topic
  • ca412686

Posted January 21, 2014 - 11:48 AM

#1

Anyone have any ideas for a map on breaking in the bike? Everywhere I look it says that it's scary lean in stock form. What about the motocross action map? Thanks guys. ImageUploadedByThumper Talk1390333700.342305.jpg

  • grayracer513

Posted January 21, 2014 - 01:30 PM

#2

It's not "scary lean" in the first place, and it doesn't hurt a four-stroke to be run lean, anyway.  By the time they are in danger from a lean mixture, they will run like crap as evidence of it, so you'll know long before anything gets hurt.

 

Just break it in by the book and be done with it.



  • delmas

Posted January 21, 2014 - 04:45 PM

#3

It's not "scary lean" in the first place, and it doesn't hurt a four-stroke to be run lean, anyway.  By the time they are in danger from a lean mixture, they will run like crap as evidence of it, so you'll know long before anything gets hurt.

 

Just break it in by the book and be done with it.

nice



  • 250premixer

Posted January 21, 2014 - 06:33 PM

#4

It's not "scary lean" in the first place, and it doesn't hurt a four-stroke to be run lean, anyway. By the time they are in danger from a lean mixture, they will run like crap as evidence of it, so you'll know long before anything gets hurt.

Just break it in by the book and be done with it.

what he said

Anyone have any ideas for a map on breaking in the bike? Everywhere I look it says that it's scary lean in stock form. What about the motocross action map? Thanks guys. http://www.thumpertalk.com/public/style_images/tt34/attachicon.gif ImageUploadedByThumper Talk1390333700.342305.jpg

leaner is meaner

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  • Yammer-Hammer

Posted January 21, 2014 - 11:33 PM

#5

250premixer, on Today, 06:33 PM, said:
what he said
leaner is meaner

Not necessarily true, gasolines stoich is 14.7 for optimal burn. But it produces the most power at about 12.5:1 to 12.6:1 air fuel ratio. Which is rich. So leaner isnt necessarily better. All the carbureted cars at work make the most power on the dyno at arround 12.5:1 air fuel ratio

Edited by Yammer-Hammer, January 21, 2014 - 11:36 PM.


  • 250premixer

Posted January 22, 2014 - 02:58 AM

#6

Not necessarily true, gasolines stoich is 14.7 for optimal burn. But it produces the most power at about 12.5:1 to 12.6:1 air fuel ratio. Which is rich. So leaner isnt necessarily better. All the carbureted cars at work make the most power on the dyno at arround 12.5:1 air fuel ratio

its a joke bro...

  • grayracer513

Posted January 22, 2014 - 07:39 AM

#7

Not necessarily true, gasolines stoich is 14.7 for optimal burn. But it produces the most power at about 12.5:1 to 12.6:1 air fuel ratio. Which is rich. So leaner isnt necessarily better. All the carbureted cars at work make the most power on the dyno at arround 12.5:1 air fuel ratio

Stoichiometric is 14.7 ("...ish"; depends a little on the fuel blend) but max power is normally more like 13-13.5:1, not 12.5. 

 

Two strokes suffer from lean fuel air ratios because the oil is delivered with the fuel.  If the engine gets less fuel, it gets less oil, unless the mix ratio is compensated.  Four-strokes actually start having lube related issues in the cylinder when the mixture is too rich, due to excess fuel washing oil off the lower rings and contaminating the oil.



  • zeuszuki

Posted January 23, 2014 - 07:16 AM

#8

I am starting to understand why manufacturers have such limited warranties ! "Bangshead repeatedly"





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