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  #11  
Old 08-10-2016, 12:32 AM
0megaMan 0megaMan is offline
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Default Re: Hello from California

If I recall he said in the second video I believe he mentioned he runs a motor with a 38mm stroke, so is the consensus that the 40mm stroke is more desireable?
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  #12  
Old 08-10-2016, 06:44 AM
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Tyler6357 Tyler6357 is offline
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Default Re: Hello from California

Yes, I think the 40mm stroke is more desireable, also, he talks about the top of the piston coming up to the very top of the cylinder which decreases the squish gap (ignition zone). A smaller squish gap creates a more powerful explosion and more power. This, I think, makes the PK80s better, however, this is just my opinion, others might respectfully disagree with me.

Last edited by Tyler6357; 08-10-2016 at 06:52 AM.
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  #13  
Old 08-10-2016, 08:37 AM
0megaMan 0megaMan is offline
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Default Re: Hello from California

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Originally Posted by Tyler6357 View Post
Yes, I think the 40mm stroke is more desireable, also, he talks about the top of the piston coming up to the very top of the cylinder which decreases the squish gap (ignition zone). A smaller squish gap creates a more powerful explosion and more power. This, I think, makes the PK80s better, however, this is just my opinion, others might respectfully disagree with me.
I appreciate the help. Probably going to order a PK80 from Dax. Seems like a good place to start.
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  #14  
Old 08-17-2016, 06:34 PM
0megaMan 0megaMan is offline
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Default Re: Hello from California

Found this on Craigslist for $100, all the cables are loose and the bottom bracket is jiggling around pretty good but everything should be easily repairable.



Pretty sure this was a screaming deal.
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  #15  
Old 08-17-2016, 06:34 PM
0megaMan 0megaMan is offline
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Default Re: Hello from California

GT5?

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  #16  
Old 08-17-2016, 08:12 PM
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MotorBicycleRacing MotorBicycleRacing is offline
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Default Re: Hello from California

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Originally Posted by 0megaMan View Post
GT5?
Looks like a PK 80 from your 3" pic.

Has a RT or RunTong carb.
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  #17  
Old 08-17-2016, 10:04 PM
0megaMan 0megaMan is offline
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Default Re: Hello from California

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Originally Posted by MotorBicycleRacing View Post
Looks like a PK 80 from your 3" pic.

Has a RT or RunTong carb.
Let the games begin. Time to get this thing operating correctly and road trip down to one of your races.
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  #18  
Old 08-17-2016, 10:12 PM
0megaMan 0megaMan is offline
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Default Re: Hello from California

RunTong, don't know if that's good or not.

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  #19  
Old 08-17-2016, 10:13 PM
0megaMan 0megaMan is offline
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Default Re: Hello from California

Better view of the motor.

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  #20  
Old 08-17-2016, 10:35 PM
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Tyler6357 Tyler6357 is offline
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Default Re: Hello from California

That looks good! $100 is a steal! Nice RT Carb upgrade, that is a much better carb than stock. Kinda hard to tell if it's a PK80 or a GT5 without taking the head and cylinder off and looking at the piston and the connecting rod and comparing them to the ones in the video. It looks like a 66cc one and not 49cc. That's a stock pipe and head on it, it don't look that bad at all, nice find!

Last edited by Tyler6357; 08-17-2016 at 10:39 PM.
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