GT80 Yamaha Engine REBUILT and TOP Speed Run!

Parts finally came in for my 1980 Yamaha GT80 enduro. I installed the new crankshaft seals also a new piston and rings, gave the engine a quick paint job, and then it was time for a first rip and top speed run! I have big plans for this little Yamaha enduro. This little bike is awesome and there will be more videos uploaded soon.

Part#1 Repairing Yamaha GT80:

Parts Washer Series:

Yamaha DT125 Series:

@kentuckyyankee

#yamaha #gt80 #enduro

[teslaedison]

Top speed run at the end is a nice touch. You show the work and the fruits of the labor. Good job

[Wolfie]

I had a GT80 when I was a kid! Had a blast on that bike.

[kevinbrock]

Try using PVC pipe to put seals in when you have a long shaft to go over. Cheap and it's soft so it will not damage anything, many sizes in quarter-inch increments so you should be able to find just about any size you need.

[josemanuelsilvaramirez]

Hi, I'm from Nicaragua, Central America. In 1992 I bought a 2-stroke yamaha gt 80cc motorcycle, model 1988, I bought it from a neighbor for US$800 with an 8-month term but since I had an accident 2 times, I paid for it in 10 months hahaha. In 1995 I sold it and I regret it to this day because I lent that money plus US$200 to add US$1, 000 and they didn't pay me, my father's cousin was my rat lawyer hahaha Until now when I see this video and hear that sound it came to me mind my cute little Yamaha GT 80cc two-stroke motorcycle. GOD BLESS YOU MUCH MORE.

[dominikphilipp]

I was waiting for this. Love these old enduros - great video!

[du-rron]

22:07 OMG you are a genius!!!! It simply does not get any better than this!!!

[Chris.J.A.B]

Wow, ! About to restore my exact same childhood bike for my kids. Very nice

[iconatlarge]

We have 2 of these including the red one we had since it was brand new in 1980. They are supposed to have a square rear light and the motors were silver. Nice job tho!

[camilosurinach]

Very good video, like the old enduros bikes from the 1970s, Camilo from Puerto Rico, thanks

[andrewsedlak]

Where did you order the piston and rings?

[melfrank]

The coils are the magneto and the generator coil., I have a GT 80, it does have the adjustment on top of the carb for the cable

[kimweigel]

Sure love to hear about what happened to Marcella! Since I have one like her and can't imagine parting with it!

[brockett]

That was fun. If you have pre-mix and the auto oiler is working you will decrease the fuel / air ratio so it will run weak and hot.

[ShogunAutoworks]

I said early when u took off it will gain compression as the honing marks wear in and the rings seat and 👍

[jackrutherford-]

how's your compression? looked like that piston might've been just short of top of cylinder. Throttle braking is my trick too. Hit throttle and brakes together to keep gas flowing.

[Formerlywarmer]

This was my first bike new in 1975 I was 11

[randysegundo]

For the carb, what are the jet settings you start with? In other words, as you screw them in, how many turns when backing out?

[yoyoskr]

Great vid. Just wondering where you ordered your top end rebuild kit?
Can’t seem to find any anywhere..
Would an mx80 pistón and rings work with this engine ? Thnx in advance

[OldManMuskrat]

When I was 7 years old my gt80 would run 40 mph top end

[EricDeKirkwood]

I just bought one of these bikes for $150. I'm looking to restore it to rideable condition to get some basic mechanical skills which I am seriously lacking. Something tells me these videos are going to be super helpful for me! Where is a good place to get parts for these?