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Old 11-05-2009, 08:04 AM   #1 (permalink)
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178 or 138 stroked???

Which combo would work best? 178 with r-head or 138 with stroker crank and r-head??
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Old 11-05-2009, 08:07 AM   #2 (permalink)
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Re: 178 or 138 stroked???

i was just talking to a guy lastnight that has a 178 +r head. he said it doesnt have as much compression as his 160 +r setup had so hes gonna go back to that i guess. and hes gonna do the stroked crank to . . not sure that is any help but good luck
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Old 11-05-2009, 08:08 AM   #3 (permalink)
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Re: 178 or 138 stroked???

138 + R stroked.... 150cc of nice ride!
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Old 11-05-2009, 08:11 AM   #4 (permalink)
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Re: 178 or 138 stroked???

get the kitako 160 4 valve i bet that thing RIPS!
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Old 11-05-2009, 08:15 AM   #5 (permalink)
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Re: 178 or 138 stroked???

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Originally Posted by monaghan View Post
get the kitako 160 4 valve i bet that thing RIPS!
walks all over those 178 inn house kits
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Old 11-05-2009, 08:32 AM   #6 (permalink)
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Re: 178 or 138 stroked???

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Originally Posted by mxguy19 View Post
Which combo would work best? 178 with r-head or 138 with stroker crank and r-head??
Mark, a 178 kit out the box 17 hp and a 138 stroked 14 hp.
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Old 11-05-2009, 09:19 AM   #7 (permalink)
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Re: 178 or 138 stroked???

anyone have any dyno run files from these 2 different setups?
i have winpep7 and ran a dyno jet dyno for a few years at the last shop i worked for.

i am in same boat.. i have +r head, and i cant decide between the 178+R or 143 Stroked +R setup...
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Old 11-05-2009, 09:22 AM   #8 (permalink)
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Re: 178 or 138 stroked???

which 143 kit
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Old 11-05-2009, 09:23 AM   #9 (permalink)
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Re: 178 or 138 stroked???

Trail Bikes probably? i heard they have fairly large valve reliefs?
i didn't get to far into it research wise yet..
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