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Lean running 2.6 225 Yamaha

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J.Kimmerly
 PostPosted: July 13th, 2015, 4:35 pm   
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Im pretty sure there are no air leaks. Ive got it sealed up pretty nice with new gaskets and ive fixed all the pipe plugs from the oil injection delete. I used moto1 gasket maker to join the block where it splits, new orings and seals on the crank. I will have a close look at it though and make sure there are no problem areas.

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Jeff Yammer
 PostPosted: July 13th, 2015, 8:04 pm   
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Always good to truly know.

Hopefully all works out. I'm really interested to know the motors porting etc. any heights measured ?

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DoktorC
 PostPosted: July 13th, 2015, 8:09 pm   
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Jeff Yammer wrote:
Always good to truly know.

Hopefully all works out. I'm really interested to know the motors porting etc. any heights measured ?


I did measure it way back when...but I don't know if I could find my notes.

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hoppy3388
 PostPosted: July 14th, 2015, 5:53 pm   
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doc is that my old powerhead?
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BoomerMuskoka
 PostPosted: July 14th, 2015, 8:49 pm   
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hoppy3388 wrote:
doc is that my old powerhead?


yes...

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J.Kimmerly
 PostPosted: July 15th, 2015, 2:31 am   
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Hoppy do you have the carbs that were set up for this powerhead still?

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OneCycle
 PostPosted: July 15th, 2015, 2:24 pm   
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what jets are in the carbs? stock 140? i think i remember 180's in the carbs for this motor... does that sound right Doc? just trying to remember..
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J.Kimmerly
 PostPosted: July 15th, 2015, 3:57 pm   
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The carbs that came with it had 180s in it. No signs of any air leaks.

Today i put in Air jets around half the size and it seems to have made difference. I was actually running around on the 180 main jets this morning. Its still not where i think it should be but it will get me through this weekend.

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DoktorC
 PostPosted: July 15th, 2015, 4:19 pm   
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180's but with low compression heads is how it was set up when James had it.

I'm glad the small air jets are helping. Sounds like they are the ticket.

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J.Kimmerly
 PostPosted: July 18th, 2015, 4:38 am   
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What is the total advance on the computer ignition? Should I look for the basic ignition?

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