1993 Gyro X - worn piston rings

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PacificRoots
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1993 Gyro X - worn piston rings

Post by PacificRoots » Mon Aug 24, 2020 3:51 pm

can anyone point me in the right direction for getting the correct parts for a top end rebuild on the TD01 engine stateside? or know of any compatability with other models ?


backstory if iterested:
I was working on getting the carb adjusted (again)
up on the stand, idling great. give it about half throttle-- still running good.
open up the throttle a few more times. eventually sustained wide open for 30-60 seconds and it would stumble in the middle briefly. almost certain i was briefly seizing up the piston.

turn it off, inspecting things and notice that i forgot to reconnect the oil pump cable to the oil pump, after reinstalling the muffler. checked the compression, it's about ~75psi -- which as I understand is pretty low.
I haven't been able to get it started since.

tl;dr: ran it WOT in the stand w/ oil pump cable disconnected, need new piston rings

cheers!
1993 Honda Gyro X
NJ50MDP -- TD01E -- PA29R-B
ModStatus: Sufficiently stock; fielding suggestions
ISO: Battery door cover; bystarter; rear air box cover; information in English

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motormike
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Re: 1993 Gyro X - worn piston rings

Post by motormike » Mon Aug 24, 2020 4:11 pm

*...doh !
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RideRed
OH-ARRR Racing
#53 Gyro

<Hondas>
<Gyro S><Helix><XL75><NN50M Gyro><NU50 Urban>
..Trooper...Buzby...Jon-Boy...Blooper
Yamahas'93 Jog><'13 Majesty><RD60>

"Live Large - Ride Small"

PacificRoots
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Re: 1993 Gyro X - worn piston rings

Post by PacificRoots » Mon Aug 24, 2020 7:43 pm

Yeah it was pretty painful realization. I'm actually rather proud of my self restraint.... In my younger days It'd have been like when Homer tried to build a barbeque....
1993 Honda Gyro X
NJ50MDP -- TD01E -- PA29R-B
ModStatus: Sufficiently stock; fielding suggestions
ISO: Battery door cover; bystarter; rear air box cover; information in English

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motormike
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Re: 1993 Gyro X - worn piston rings

Post by motormike » Mon Aug 24, 2020 10:15 pm

I should think it would be relatively easy to find
looking in southeast Asia. Have you tried CMSNL ? https://www.cmsnl.com/honda-scooter_model3/
RideRed
OH-ARRR Racing
#53 Gyro

<Hondas>
<Gyro S><Helix><XL75><NN50M Gyro><NU50 Urban>
..Trooper...Buzby...Jon-Boy...Blooper
Yamahas'93 Jog><'13 Majesty><RD60>

"Live Large - Ride Small"

PacificRoots
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Re: 1993 Gyro X - worn piston rings

Post by PacificRoots » Mon Sep 14, 2020 6:23 pm

I did check cmsnl; but didn't want to wait for shipping... Ended up ordering a Universal Parts piston kit and gaskets from parts4scooters.Com or something like that.

They were delivered today. Any advice on install, known pitfalls, etc. Is welcomed.

Also-- I noticed that my cylinder head looks like it has stretch marks on it. (see photo) anybody experienced this?

https://imgur.com/a/EukMtB2
1993 Honda Gyro X
NJ50MDP -- TD01E -- PA29R-B
ModStatus: Sufficiently stock; fielding suggestions
ISO: Battery door cover; bystarter; rear air box cover; information in English

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