Honda Gyro TG50M (1985)...lets make her faster?

Twilight · Post by **Twilight** » Fri Dec 12, 2008 7:18 pm

I got a call finally from my friend in Japan that made his roadfox go 45mp/h (72km/h). He told me that after having a small amount of machine work done on the cases, you can use many of the spree and dio kits. As for the exhaust port, he said to cut and weld for best fit.

Larger carb and correct fuel mixture is crucial for stock. When he used honda synthetic 2 stroke oil and made sure the opening was not clogged. It was a easy way to get above 33mph.

Going to send me all the details when he goes home this weekend and looks it over =)

Kenny_McCormic · Post by **Kenny_McCormic** » Fri Dec 12, 2008 8:26 pm

Do some machining, put a 72cc kit on it. find a bigger intake for a bigger carb. Build a pipe.

ALOW1 · Post by **ALOW1** » Sat Dec 13, 2008 1:49 am

Kenny_McCormic wrote:Do some machining, put a 72cc kit on it. find a bigger intake for a bigger carb. Build a pipe.

Thats what I was thinking. Will the factory clutches be able to handle it though?

Kenny_McCormic · Post by **Kenny_McCormic** » Sat Dec 13, 2008 11:13 am

I dont see why not.

mousewheels · Post by **mousewheels** » Sat Dec 13, 2008 4:21 pm

He told me that after having a small amount of machine work done on the cases, you can use many of the spree and dio kits.

Hey - Dio! Don't have a cyl, but I think the exhaust port is better oriented for a Gyro. Don't know about the cyl bolt spacing - anyone here put Dio cyls in pre-94 Elites and Aeros?

Sorry for the delay, had to root around for the parts in the pics.

Gyro head is perfect fit for the Aero cyl.

Exhaust port has just a little interference with the case bolt boss on the left side case. Hard to see, but the cyl doesn't sit flush. Might take just minor grinding to fix. Some of the left case could also be modified for exhaust pipe clearance. Its clear of the flywheel/fan, just gets into some of the cooling air duct space.

Pic to show what an exhaust pipe cutaway could intrude on

But on the right case half, the cyl sits flush

P.S. - Never heard about '85's being faster than '86. I have a Black one too, and its not really different from the Reds.

Twilight · Post by **Twilight** » Sun Dec 14, 2008 1:57 pm

Not sure about mine then. I did go to pre-mix at 20:1 with Honda Synthetic 2 stroke. It sure does make the top end more peppy.

I took a day off work and thinking and had some fun; Me and the girl took the gyro's into the snow and ripped it up, some fun ice sliding and circle tracking... never forget it! I'll get the video camera setup if we do another run =)

Also made a igloo.

mousewheels- Would you be interested in some japanese performance parts? Might be able to get some pipes and cylinders, not too sure yet.

Also... might be able to get parts

Thanks for the pics of the parts. What aero is that off of? A 80 or 50?

Kenny_McCormic · Post by **Kenny_McCormic** » Sun Dec 14, 2008 2:03 pm

Do the transfers line up or will it need to be port matched?

Twilight · Post by **Twilight** » Sun Dec 14, 2008 2:08 pm

Looks like they match quite well, not sure cause im not looking at them.

mousewheels · Post by **mousewheels** » Sun Dec 14, 2008 8:05 pm

Not sure about mine then. I did go to pre-mix at 20:1 with Honda Synthetic 2 stroke. It sure does make the top end more peppy.

I'll give premix and up the tire psi this spring. Brr! its cold out, but you tearing up on the ice was no doubt fun. Do get some videos!

mousewheels- Would you be interested in some japanese performance parts? Might be able to get some pipes and cylinders, not too sure yet.

Yeah sure! Thanks for asking

What aero is that off of? A 80 or 50?

Cyl is an '87 Aero 50 = part number 12101-GN2-030. The -030 is slight oversize 'CYLINDER A (0/+0.005)'. You can see the 'A' stamp on in the pic.

Do the transfers line up or will it need to be port matched?

Side by side they look close. I took identical size pics and made a composite so all can see.

Gyro Cyl

Aero Cyl

Composite

Dac · Post by **Dac** » Thu Dec 18, 2008 12:55 am

umm, dudes.....

Honda Hobbit cylinder maybe?

Twilight · Post by **Twilight** » Thu Dec 18, 2008 2:13 am

Nice! My friend has a parts one too... lets see if it fits the cases. I'll hopefully find out this weekend.

mousewheels · Post by **mousewheels** » Thu Dec 18, 2008 2:37 pm

umm, dudes.....

Dac -- Oh, there's an idea, never thought to look at the non-forced air cooled cyls. Ex port is closer -- Thanks!

ALOW1 · Post by **ALOW1** » Thu Dec 18, 2008 3:11 pm

This thread rocks. I dont own a Gyro but the information here is good. And the pictures posted are very good.

Twilight · Post by **Twilight** » Thu Dec 18, 2008 9:38 pm

Yo mouse, wanna do some snow riding?

maddog · Post by **maddog** » Fri Dec 19, 2008 1:20 am

the gyro & spree were never meant to be modified! a yamaha razz has more hi-po parts- i still have rare honda express parts that will scare you