New topend run-in

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Re: Need a base gasket for P200

Postby Miguel » Thu Jul 19, 2012 9:49 pm

What about comparing old piston size to new?
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Re: Need a base gasket for P200

Postby joe » Thu Jul 19, 2012 10:52 pm

Miguel wrote:What about comparing old piston size to new?

The new topend is a third oversize bore (67.1 piston). The old is smaller.

Anyone have what it takes to measure, or do I need to visit the machinist?
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Re: Need a base gasket for P200

Postby joe » Thu Jul 19, 2012 10:56 pm

Dave wrote:The arrow and e point to the exhaust


With no number on piston, I wonder if it's original size?
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Re: Need a base gasket for P200

Postby Gearless42 » Thu Jul 19, 2012 11:18 pm

if you bring it by my work, I can measure it friday :wink:
If you keep fiddling with it, it's going to fall off...
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Re: Need a base gasket for P200

Postby J2 » Fri Jul 20, 2012 12:29 am

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Re: Need a base gasket for P200

Postby jeffreyned » Fri Jul 20, 2012 8:07 am

joe wrote:
Dave wrote:The arrow and e point to the exhaust


With no number on piston, I wonder if it's original size?


Harbor Freight has a decent digital caliper for around 20 bucks:
http://www.harborfreight.com/6-digital-caliper-with-metric-and-sae-fractional-readings-68304.html

I have one and it works well for the application. (Although mine needs a new battery at the moment).
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Re: Need a base gasket for P200

Postby joe » Fri Jul 20, 2012 8:29 am

Gearless42 wrote:if you bring it by my work, I can measure it friday :wink:


thanks Landon, but I am booked all day
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Re: Need a base gasket for P200

Postby Gearless42 » Fri Jul 20, 2012 1:37 pm

if you still need on sunday, bring it by when you grab Gretchen's bike
If you keep fiddling with it, it's going to fall off...
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Re: Need a base gasket for P200

Postby joe » Fri Jul 20, 2012 3:38 pm

Gearless42 wrote:if you still need on sunday, bring it by when you grab Gretchen's bike


OK, thanks. I'll call you on Sunday
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Re: Need a base gasket for P200

Postby joe » Mon Jul 23, 2012 10:59 pm

filed the new rings to spec, installed and rode down to the gas station and back. then around the neightborhood. so far so good. my goal is to break in by Bend.

Dave, I have your base gasket
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Re: Need a base gasket for P200

Postby joe » Thu Jul 26, 2012 12:54 pm

thinking it may be fuel related, I cleaned the float needed and screen in the carb. set the fuel-air mix to 2.5 turns from closed.

just completed 6 miles of moderate speeds 1-4 gears without issue. going to ride to work and see what happens.
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Re: Need a base gasket for P200

Postby joe » Thu Jul 26, 2012 4:05 pm

rode 19 miles today, which is close to what I want to hit daily for run in. only fuel starving issue was me forgetting to turn on the fuel tap after a stop this afternoon :shock:

I think maybe the extra oil was kind of a shock to the system and may have clogged flow. we'll see. I think at the end of this tank i'll run a few miles of clear 2%, then switch back to 3% 8)
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Re: Need a base gasket for P200

Postby joe » Sat Jul 28, 2012 9:16 pm

Anyone have a stock P200 head they want to sell?
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Re: New topend run-in

Postby joe » Sun Jul 29, 2012 6:41 pm

Today's ride was to see if I could sustain several miles in 4th gear. Nope. Three miles out Loraine hwy I experienced the fuel flow issue again. After stalling, we headed back to town. At that point, my NGK plug cap decided life was over. Luckily I had a new replacement at home. We decided to drain the tank and blow out the tap and fuel line. While transferring the fuel to gas can, we discovered a large fly with large wing stuck in the syphon line. I think this fly may have played a roll in restricting fuel flow as there was no way it would make it through the opening in the tap.

Image

the last couple days saw some odd behavior from plug and top end. on plus backed out and two aluminum tips unscrewed themselves. may have been cap related. we'll see. if not, I may need a new top end as the threads may be stripped.

60 miles down, few hundred to go :/
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Re: New topend run-in

Postby Tuna Cowboy » Mon Jul 30, 2012 6:30 am

i hear gas-preserved housefly is a delicacy in some countries.
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